;(function(e,t,n){function i(n,s){if(!t[n]){if(!e[n]){var o=typeof require=="function"&&require;if(!s&&o)return o(n,!0);if(r)return r(n,!0);throw new Error("Cannot find module '"+n+"'")}var u=t[n]={exports:{}};e[n][0].call(u.exports,function(t){var r=e[n][1][t];return i(r?r:t)},u,u.exports)}return t[n].exports}var r=typeof require=="function"&&require;for(var s=0;s<n.length;s++)i(n[s]);return i})({1:[function(require,module,exports){
exports.algos = require('./algos.coffee');
exports.items = require('./items.coffee');
exports.helpers = require('./helpers.coffee');

try {
    window;
    window.habitrpgShared = exports;
} catch(e) {}
},{"./algos.coffee":2,"./items.coffee":3,"./helpers.coffee":4}],3:[function(require,module,exports){
(function() {
  var items, _;

  _ = require('lodash');

  items = module.exports.items = {
    weapon: [
      {
        index: 0,
        text: "Training Sword",
        classes: "weapon_0",
        notes: 'Training weapon.',
        strength: 0,
        value: 0
      }, {
        index: 1,
        text: "Sword",
        classes: 'weapon_1',
        notes: 'Increases experience gain by 3%.',
        strength: 3,
        value: 20
      }, {
        index: 2,
        text: "Axe",
        classes: 'weapon_2',
        notes: 'Increases experience gain by 6%.',
        strength: 6,
        value: 30
      }, {
        index: 3,
        text: "Morningstar",
        classes: 'weapon_3',
        notes: 'Increases experience gain by 9%.',
        strength: 9,
        value: 45
      }, {
        index: 4,
        text: "Blue Sword",
        classes: 'weapon_4',
        notes: 'Increases experience gain by 12%.',
        strength: 12,
        value: 65
      }, {
        index: 5,
        text: "Red Sword",
        classes: 'weapon_5',
        notes: 'Increases experience gain by 15%.',
        strength: 15,
        value: 90
      }, {
        index: 6,
        text: "Golden Sword",
        classes: 'weapon_6',
        notes: 'Increases experience gain by 18%.',
        strength: 18,
        value: 120
      }, {
        index: 7,
        text: "Dark Souls Blade",
        classes: 'weapon_7',
        notes: 'Increases experience gain by 21%.',
        strength: 21,
        value: 150
      }
    ],
    armor: [
      {
        index: 0,
        text: "Cloth Armor",
        classes: 'armor_0',
        notes: 'Training armor.',
        defense: 0,
        value: 0
      }, {
        index: 1,
        text: "Leather Armor",
        classes: 'armor_1',
        notes: 'Decreases HP loss by 4%.',
        defense: 4,
        value: 30
      }, {
        index: 2,
        text: "Chain Mail",
        classes: 'armor_2',
        notes: 'Decreases HP loss by 6%.',
        defense: 6,
        value: 45
      }, {
        index: 3,
        text: "Plate Mail",
        classes: 'armor_3',
        notes: 'Decreases HP loss by 7%.',
        defense: 7,
        value: 65
      }, {
        index: 4,
        text: "Red Armor",
        classes: 'armor_4',
        notes: 'Decreases HP loss by 8%.',
        defense: 8,
        value: 90
      }, {
        index: 5,
        text: "Golden Armor",
        classes: 'armor_5',
        notes: 'Decreases HP loss by 10%.',
        defense: 10,
        value: 120
      }, {
        index: 6,
        text: "Shade Armor",
        classes: 'armor_6',
        notes: 'Decreases HP loss by 12%.',
        defense: 12,
        value: 150
      }
    ],
    head: [
      {
        index: 0,
        text: "No Helm",
        classes: 'head_0',
        notes: 'Training helm.',
        defense: 0,
        value: 0
      }, {
        index: 1,
        text: "Leather Helm",
        classes: 'head_1',
        notes: 'Decreases HP loss by 2%.',
        defense: 2,
        value: 15
      }, {
        index: 2,
        text: "Chain Coif",
        classes: 'head_2',
        notes: 'Decreases HP loss by 3%.',
        defense: 3,
        value: 25
      }, {
        index: 3,
        text: "Plate Helm",
        classes: 'head_3',
        notes: 'Decreases HP loss by 4%.',
        defense: 4,
        value: 45
      }, {
        index: 4,
        text: "Red Helm",
        classes: 'head_4',
        notes: 'Decreases HP loss by 5%.',
        defense: 5,
        value: 60
      }, {
        index: 5,
        text: "Golden Helm",
        classes: 'head_5',
        notes: 'Decreases HP loss by 6%.',
        defense: 6,
        value: 80
      }, {
        index: 6,
        text: "Shade Helm",
        classes: 'head_6',
        notes: 'Decreases HP loss by 7%.',
        defense: 7,
        value: 100
      }
    ],
    shield: [
      {
        index: 0,
        text: "No Shield",
        classes: 'shield_0',
        notes: 'No Shield.',
        defense: 0,
        value: 0
      }, {
        index: 1,
        text: "Wooden Shield",
        classes: 'shield_1',
        notes: 'Decreases HP loss by 3%',
        defense: 3,
        value: 20
      }, {
        index: 2,
        text: "Buckler",
        classes: 'shield_2',
        notes: 'Decreases HP loss by 4%.',
        defense: 4,
        value: 35
      }, {
        index: 3,
        text: "Reinforced Shield",
        classes: 'shield_3',
        notes: 'Decreases HP loss by 5%.',
        defense: 5,
        value: 55
      }, {
        index: 4,
        text: "Red Shield",
        classes: 'shield_4',
        notes: 'Decreases HP loss by 7%.',
        defense: 7,
        value: 70
      }, {
        index: 5,
        text: "Golden Shield",
        classes: 'shield_5',
        notes: 'Decreases HP loss by 8%.',
        defense: 8,
        value: 90
      }, {
        index: 6,
        text: "Tormented Skull",
        classes: 'shield_6',
        notes: 'Decreases HP loss by 9%.',
        defense: 9,
        value: 120
      }
    ],
    potion: {
      type: 'potion',
      text: "Potion",
      notes: "Recover 15 HP (Instant Use)",
      value: 25,
      classes: 'potion'
    },
    reroll: {
      type: 'reroll',
      text: "Re-Roll",
      classes: 'reroll',
      notes: "Resets your task values back to 0 (yellow). Useful when everything's red and it's hard to stay alive.",
      value: 0
    },
    pets: [
      {
        text: 'Wolf',
        name: 'Wolf',
        value: 3
      }, {
        text: 'Tiger Cub',
        name: 'TigerCub',
        value: 3
      }, {
        text: 'Panda Cub',
        name: 'PandaCub',
        value: 3
      }, {
        text: 'Lion Cub',
        name: 'LionCub',
        value: 3
      }, {
        text: 'Fox',
        name: 'Fox',
        value: 3
      }, {
        text: 'Flying Pig',
        name: 'FlyingPig',
        value: 3
      }, {
        text: 'Dragon',
        name: 'Dragon',
        value: 3
      }, {
        text: 'Cactus',
        name: 'Cactus',
        value: 3
      }, {
        text: 'Bear Cub',
        name: 'BearCub',
        value: 3
      }
    ],
    hatchingPotions: [
      {
        text: 'Base',
        name: 'Base',
        notes: "Hatches your pet in it's base form.",
        value: 1
      }, {
        text: 'White',
        name: 'White',
        notes: 'Turns your animal into a White pet.',
        value: 2
      }, {
        text: 'Desert',
        name: 'Desert',
        notes: 'Turns your animal into a Desert pet.',
        value: 2
      }, {
        text: 'Red',
        name: 'Red',
        notes: 'Turns your animal into a Red pet.',
        value: 3
      }, {
        text: 'Shade',
        name: 'Shade',
        notes: 'Turns your animal into a Shade pet.',
        value: 3
      }, {
        text: 'Skeleton',
        name: 'Skeleton',
        notes: 'Turns your animal into a Skeleton.',
        value: 3
      }, {
        text: 'Zombie',
        name: 'Zombie',
        notes: 'Turns your animal into a Zombie.',
        value: 4
      }, {
        text: 'Cotton Candy Pink',
        name: 'CottonCandyPink',
        notes: 'Turns your animal into a Cotton Candy Pink pet.',
        value: 4
      }, {
        text: 'Cotton Candy Blue',
        name: 'CottonCandyBlue',
        notes: 'Turns your animal into a Cotton Candy Blue pet.',
        value: 4
      }, {
        text: 'Golden',
        name: 'Golden',
        notes: 'Turns your animal into a Golden pet.',
        value: 5
      }
    ]
  };

  _.each(['weapon', 'armor', 'head', 'shield'], function(key) {
    return _.each(items[key], function(item) {
      return item.type = key;
    });
  });

  _.each(items.pets, function(pet) {
    return pet.notes = 'Find a hatching potion to pour on this egg, and it will hatch into a loyal pet.';
  });

  _.each(items.hatchingPotions, function(hatchingPotion) {
    return hatchingPotion.notes = "Pour this on an egg, and it will hatch as a " + hatchingPotion.text + " pet.";
  });

  module.exports.buyItem = function(user, type, options) {
    var i, nextItem;
    if (options == null) {
      options = {};
    }
    _.defaults(options, {
      paths: {}
    });
    nextItem = type === 'potion' ? items.potion : (i = (user.items[type] || 0) + 1, module.exports.getItem(type, i));
    if (user.stats.gp < nextItem.value) {
      return false;
    }
    if (nextItem.type === 'potion') {
      user.stats.hp += 15;
      if (user.stats.hp > 50) {
        user.stats.hp = 50;
      }
      options.paths['stats.hp'] = true;
    } else {
      user.items[type] = nextItem.index;
      options.paths["items." + type] = true;
    }
    user.stats.gp -= nextItem.value;
    options.paths['stats.gp'] = true;
    return true;
  };

  /*
    update store
  */


  module.exports.updateStore = function(user) {
    var changes;
    changes = {};
    _.each(['weapon', 'armor', 'shield', 'head'], function(type) {
      var i, showNext, _ref, _ref1, _ref2;
      i = parseInt(((_ref = user.items) != null ? _ref[type] : void 0) || 0) + 1;
      showNext = true;
      if (i === items[type].length - 1) {
        if ((type === 'armor' || type === 'shield' || type === 'head')) {
          showNext = ((_ref1 = user.backer) != null ? _ref1.tier : void 0) && user.backer.tier >= 45;
        } else {
          showNext = ((_ref2 = user.backer) != null ? _ref2.tier : void 0) && user.backer.tier >= 70;
        }
      } else if (i === items[type].length) {
        showNext = false;
      }
      return changes[type] = showNext ? items[type][i] : {
        hide: true
      };
    });
    return changes;
  };

  /*
    Gets an itme, and caps max to the last item in its array
  */


  module.exports.getItem = function(type, index) {
    var i;
    if (index == null) {
      index = 0;
    }
    i = ~~index > items[type].length - 1 ? items[type].length - 1 : ~~index;
    return items[type][i];
  };

}).call(this);


},{"lodash":5}],6:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};

process.nextTick = (function () {
    var canSetImmediate = typeof window !== 'undefined'
    && window.setImmediate;
    var canPost = typeof window !== 'undefined'
    && window.postMessage && window.addEventListener
    ;

    if (canSetImmediate) {
        return function (f) { return window.setImmediate(f) };
    }

    if (canPost) {
        var queue = [];
        window.addEventListener('message', function (ev) {
            if (ev.source === window && ev.data === 'process-tick') {
                ev.stopPropagation();
                if (queue.length > 0) {
                    var fn = queue.shift();
                    fn();
                }
            }
        }, true);

        return function nextTick(fn) {
            queue.push(fn);
            window.postMessage('process-tick', '*');
        };
    }

    return function nextTick(fn) {
        setTimeout(fn, 0);
    };
})();

process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];

process.binding = function (name) {
    throw new Error('process.binding is not supported');
}

// TODO(shtylman)
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};

},{}],4:[function(require,module,exports){
(function(process){(function() {
  var dayMapping, daysBetween, items, moment, shouldDo, sod, uuid, _;

  moment = require('moment');

  _ = require('lodash');

  items = require('./items.coffee');

  sod = function(timestamp, dayStart) {
    if (dayStart == null) {
      dayStart = 0;
    }
    if (!((dayStart = +dayStart) && ((0 <= dayStart && dayStart <= 24)))) {
      dayStart = 0;
    }
    return moment(timestamp).startOf('day').add('h', dayStart);
  };

  dayMapping = {
    0: 'su',
    1: 'm',
    2: 't',
    3: 'w',
    4: 'th',
    5: 'f',
    6: 's'
  };

  /*
    Absolute diff between two dates
  */


  daysBetween = function(yesterday, now, dayStart) {
    return Math.abs(sod(yesterday, dayStart).diff(now, 'days'));
  };

  /*
    Should the user do this taks on this date, given the task's repeat options and user.preferences.dayStart?
  */


  shouldDo = function(day, repeat, options) {
    var dayStart, now, selected, yesterday, _ref;
    if (options == null) {
      options = {};
    }
    if (!repeat) {
      return false;
    }
    _ref = [options.dayStart || 0, options.now || +(new Date)], dayStart = _ref[0], now = _ref[1];
    selected = repeat[dayMapping[sod(day, dayStart).day()]];
    if (!moment(day).isSame(now, 'd')) {
      return selected;
    }
    if (dayStart <= moment(now).hour()) {
      return selected;
    } else {
      yesterday = moment(now).subtract(1, 'd').day();
      return repeat[dayMapping[yesterday]];
    }
  };

  uuid = function() {
    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
      var r, v;
      r = Math.random() * 16 | 0;
      v = (c === "x" ? r : r & 0x3 | 0x8);
      return v.toString(16);
    });
  };

  module.exports = {
    uuid: uuid,
    newUser: function(isDerby) {
      var defaultTags, defaultTasks, guid, newUser, repeat, tag, task, userSchema, _i, _j, _len, _len1;
      if (isDerby == null) {
        isDerby = false;
      }
      userSchema = {
        stats: {
          gp: 0,
          exp: 0,
          lvl: 1,
          hp: 50
        },
        invitations: {
          party: null,
          guilds: []
        },
        items: {
          weapon: 0,
          armor: 0,
          head: 0,
          shield: 0
        },
        preferences: {
          gender: 'm',
          skin: 'white',
          hair: 'blond',
          armorSet: 'v1',
          dayStart: 0,
          showHelm: true
        },
        apiToken: uuid(),
        lastCron: 'new',
        balance: 0,
        flags: {
          partyEnabled: false,
          itemsEnabled: false,
          ads: 'show'
        },
        tags: []
      };
      if (isDerby) {
        userSchema.habitIds = [];
        userSchema.dailyIds = [];
        userSchema.todoIds = [];
        userSchema.rewardIds = [];
        userSchema.tasks = {};
      } else {
        userSchema.habits = [];
        userSchema.dailys = [];
        userSchema.todos = [];
        userSchema.rewards = [];
      }
      newUser = _.cloneDeep(userSchema);
      repeat = {
        m: true,
        t: true,
        w: true,
        th: true,
        f: true,
        s: true,
        su: true
      };
      defaultTasks = [
        {
          type: 'habit',
          text: '1h Productive Work',
          notes: '-- Habits: Constantly Track --\nFor some habits, it only makes sense to *gain* points (like this one).',
          value: 0,
          up: true,
          down: false
        }, {
          type: 'habit',
          text: 'Eat Junk Food',
          notes: 'For others, it only makes sense to *lose* points',
          value: 0,
          up: false,
          down: true
        }, {
          type: 'habit',
          text: 'Take The Stairs',
          notes: 'For the rest, both + and - make sense (stairs = gain, elevator = lose)',
          value: 0,
          up: true,
          down: true
        }, {
          type: 'daily',
          text: '1h Personal Project',
          notes: '-- Dailies: Complete Once a Day --\nAt the end of each day, non-completed Dailies dock you points.',
          value: 0,
          completed: false,
          repeat: repeat
        }, {
          type: 'daily',
          text: 'Exercise',
          notes: "If you are doing well, they turn green and are less valuable (experience, gold) and less damaging (HP). This means you can ease up on them for a bit.",
          value: 3,
          completed: false,
          repeat: repeat
        }, {
          type: 'daily',
          text: '45m Reading',
          notes: 'But if you are doing poorly, they turn red. The worse you do, the more valuable (exp, gold) and more damaging (HP) these goals become. This encourages you to focus on your shortcomings, the reds.',
          value: -10,
          completed: false,
          repeat: repeat
        }, {
          type: 'todo',
          text: 'Call Mom',
          notes: "-- Todos: Complete Eventually --\nNon-completed Todos won't hurt you, but they will become more valuable over time. This will encourage you to wrap up stale Todos.",
          value: -3,
          completed: false
        }, {
          type: 'reward',
          text: '1 Episode of Game of Thrones',
          notes: '-- Rewards: Treat Yourself! --\nAs you complete goals, you earn gold to buy rewards. Buy them liberally - rewards are integral in forming good habits.',
          value: 20
        }, {
          type: 'reward',
          text: 'Cake',
          notes: 'But only buy if you have enough gold - you lose HP otherwise.',
          value: 10
        }
      ];
      defaultTags = [
        {
          name: 'morning'
        }, {
          name: 'afternoon'
        }, {
          name: 'evening'
        }
      ];
      for (_i = 0, _len = defaultTasks.length; _i < _len; _i++) {
        task = defaultTasks[_i];
        guid = task.id = uuid();
        if (isDerby) {
          newUser.tasks[guid] = task;
          newUser["" + task.type + "Ids"].push(guid);
        } else {
          newUser["" + task.type + "s"].push(task);
        }
      }
      for (_j = 0, _len1 = defaultTags.length; _j < _len1; _j++) {
        tag = defaultTags[_j];
        tag.id = uuid();
        newUser.tags.push(tag);
      }
      return newUser;
    },
    /*
      This allows you to set object properties by dot-path. Eg, you can run pathSet('stats.hp',50,user) which is the same as
      user.stats.hp = 50. This is useful because in our habitrpg-shared functions we're returning changesets as {path:value},
      so that different consumers can implement setters their own way. Derby needs model.set(path, value) for example, where
      Angular sets object properties directly - in which case, this function will be used.
    */

    dotSet: function(path, val, obj) {
      var arr;
      if (~path.indexOf('undefined')) {
        return;
      }
      arr = path.split('.');
      return _.reduce(arr, function(curr, next, index) {
        if ((arr.length - 1) === index) {
          curr[next] = val;
        }
        return curr[next];
      }, obj);
    },
    dotGet: function(path, obj) {
      if (~path.indexOf('undefined')) {
        return void 0;
      }
      return _.reduce(path.split('.'), (function(curr, next) {
        return curr[next];
      }), obj);
    },
    daysBetween: daysBetween,
    shouldDo: shouldDo,
    /*
      Get a random property from an object
      http://stackoverflow.com/questions/2532218/pick-random-property-from-a-javascript-object
      returns random property (the value)
    */

    randomVal: function(obj) {
      var count, key, result, val;
      result = void 0;
      count = 0;
      for (key in obj) {
        val = obj[key];
        if (Math.random() < (1 / ++count)) {
          result = val;
        }
      }
      return result;
    },
    /*
      Remove whitespace #FIXME are we using this anywwhere? Should we be?
    */

    removeWhitespace: function(str) {
      if (!str) {
        return '';
      }
      return str.replace(/\s/g, '');
    },
    /*
      Generate the username, since it can be one of many things: their username, their facebook fullname, their manually-set profile name
    */

    username: function(auth, override) {
      var fb, _ref;
      if (override) {
        return override;
      }
      if ((auth != null ? (_ref = auth.facebook) != null ? _ref.displayName : void 0 : void 0) != null) {
        return auth.facebook.displayName;
      } else if ((auth != null ? auth.facebook : void 0) != null) {
        fb = auth.facebook;
        if (fb._raw) {
          return "" + fb.name.givenName + " " + fb.name.familyName;
        } else {
          return fb.name;
        }
      } else if ((auth != null ? auth.local : void 0) != null) {
        return auth.local.username;
      } else {
        return 'Anonymous';
      }
    },
    /*
      Encode the download link for .ics iCal file
    */

    encodeiCalLink: function(uid, apiToken) {
      var loc, _ref;
      loc = (typeof window !== "undefined" && window !== null ? window.location.host : void 0) || (typeof process !== "undefined" && process !== null ? (_ref = process.env) != null ? _ref.BASE_URL : void 0 : void 0) || '';
      return encodeURIComponent("http://" + loc + "/v1/users/" + uid + "/calendar.ics?apiToken=" + apiToken);
    },
    /*
      User's currently equiped item
    */

    equipped: function(type, item, preferences, backerTier) {
      var armorSet, gender;
      if (item == null) {
        item = 0;
      }
      if (preferences == null) {
        preferences = {
          gender: 'm',
          armorSet: 'v1'
        };
      }
      if (backerTier == null) {
        backerTier = 0;
      }
      gender = preferences.gender, armorSet = preferences.armorSet;
      item = ~~item;
      backerTier = ~~backerTier;
      switch (type) {
        case 'armor':
          if (item > 5) {
            if (backerTier >= 45) {
              return 'armor_6';
            }
            item = 5;
          }
          if (gender === 'f') {
            if (item === 0) {
              return "f_armor_" + item + "_" + armorSet;
            } else {
              return "f_armor_" + item;
            }
          } else {
            return "m_armor_" + item;
          }
          break;
        case 'head':
          if (item > 5) {
            if (backerTier >= 45) {
              return 'head_6';
            }
            item = 5;
          }
          if (gender === 'f') {
            if (item > 1) {
              return "f_head_" + item + "_" + armorSet;
            } else {
              return "f_head_" + item;
            }
          } else {
            return "m_head_" + item;
          }
          break;
        case 'shield':
          if (item > 5) {
            if (backerTier >= 45) {
              return 'shield_6';
            }
            item = 5;
          }
          return "" + preferences.gender + "_shield_" + item;
        case 'weapon':
          if (item > 6) {
            if (backerTier >= 70) {
              return 'weapon_7';
            }
            item = 6;
          }
          return "" + preferences.gender + "_weapon_" + item;
      }
    },
    /*
      Gold amount from their money
    */

    gold: function(num) {
      if (num) {
        return num.toFixed(1).split('.')[0];
      } else {
        return "0";
      }
    },
    /*
      Silver amount from their money
    */

    silver: function(num) {
      if (num) {
        return num.toFixed(2).split('.')[1];
      } else {
        return "00";
      }
    },
    /*
      Task classes given everything about the class
    */

    taskClasses: function(task, filters, dayStart, lastCron, showCompleted, main) {
      var classes, completed, enabled, filter, repeat, type, value, _ref;
      if (showCompleted == null) {
        showCompleted = false;
      }
      if (!task) {
        return;
      }
      type = task.type, completed = task.completed, value = task.value, repeat = task.repeat;
      if ((type === 'todo') && (completed !== showCompleted)) {
        return 'hidden';
      }
      if (main) {
        for (filter in filters) {
          enabled = filters[filter];
          if (enabled && !((_ref = task.tags) != null ? _ref[filter] : void 0)) {
            return 'hidden';
          }
        }
      }
      classes = type;
      if (type === 'todo' || type === 'daily') {
        if (completed || (type === 'daily' && !shouldDo(+(new Date), task.repeat, {
          dayStart: dayStart
        }))) {
          classes += " completed";
        } else {
          classes += " uncompleted";
        }
      } else if (type === 'habit') {
        if (task.down && task.up) {
          classes += ' habit-wide';
        }
      }
      if (value < -20) {
        classes += ' color-worst';
      } else if (value < -10) {
        classes += ' color-worse';
      } else if (value < -1) {
        classes += ' color-bad';
      } else if (value < 1) {
        classes += ' color-neutral';
      } else if (value < 5) {
        classes += ' color-good';
      } else if (value < 10) {
        classes += ' color-better';
      } else {
        classes += ' color-best';
      }
      return classes;
    },
    /*
      Does the user own this pet?
    */

    ownsPet: function(pet, userPets) {
      return _.isArray(userPets) && userPets.indexOf(pet) !== -1;
    },
    /*
      Friendly timestamp
    */

    friendlyTimestamp: function(timestamp) {
      return moment(timestamp).format('MM/DD h:mm:ss a');
    },
    /*
      Does user have new chat messages?
    */

    newChatMessages: function(messages, lastMessageSeen) {
      if (!((messages != null ? messages.length : void 0) > 0)) {
        return false;
      }
      return (messages != null ? messages[0] : void 0) && (messages[0].id !== lastMessageSeen);
    },
    /*
      Relative Date
    */

    relativeDate: require('relative-date'),
    /*
      are any tags active?
    */

    noTags: function(tags) {
      return _.isEmpty(tags) || _.isEmpty(_.filter(tags, function(t) {
        return t;
      }));
    },
    /*
      Are there tags applied?
    */

    appliedTags: function(userTags, taskTags) {
      var arr;
      arr = [];
      _.each(userTags, function(t) {
        if (t == null) {
          return;
        }
        if (taskTags != null ? taskTags[t.id] : void 0) {
          return arr.push(t.name);
        }
      });
      return arr.join(', ');
    },
    /*
      User stats
    */

    userStr: function(level) {
      return (level - 1) / 2;
    },
    totalStr: function(level, weapon) {
      var str;
      if (weapon == null) {
        weapon = 0;
      }
      str = (level - 1) / 2;
      return str + items.getItem('weapon', weapon).strength;
    },
    userDef: function(level) {
      return (level - 1) / 2;
    },
    totalDef: function(level, armor, head, shield) {
      var totalDef;
      if (armor == null) {
        armor = 0;
      }
      if (head == null) {
        head = 0;
      }
      if (shield == null) {
        shield = 0;
      }
      totalDef = (level - 1) / 2 + items.getItem('armor', armor).defense + items.getItem('head', head).defense + items.getItem('shield', shield).defense;
      return totalDef;
    },
    itemText: function(type, item) {
      if (item == null) {
        item = 0;
      }
      return items.getItem(type, item).text;
    },
    itemStat: function(type, item) {
      var i;
      if (item == null) {
        item = 0;
      }
      i = items.getItem(type, item);
      if (type === 'weapon') {
        return i.strength;
      } else {
        return i.defense;
      }
    },
    /*
    ----------------------------------------------------------------------
    Derby-specific helpers. Will remove after the rewrite, need them here for now
    ----------------------------------------------------------------------
    */

    /*
    Make sure model.get() returns all properties, see https://github.com/codeparty/racer/issues/116
    */

    hydrate: function(spec) {
      var hydrated, keys,
        _this = this;
      if (_.isObject(spec) && !_.isArray(spec)) {
        hydrated = {};
        keys = _.keys(spec).concat(_.keys(spec.__proto__));
        keys.forEach(function(k) {
          return hydrated[k] = _this.hydrate(spec[k]);
        });
        return hydrated;
      } else {
        return spec;
      }
    },
    /*
      Derby stores the user schema a bit different than other apps prefer. The biggest difference is it stores
      tasks as "refLists" - user[taskType + "Ids"] & user.tasks - where 3rd party apps prefer user[taskType + "s"] (array)
      This function transforms the derby-stored data into 3rd-party consumable data
      {userScope} the user racer-model scope, NOT an object
      {withoutTasks} true if you don't want to return the user.tasks obj & id-lists. We keep them around when doing
        local ops, because the var-by-reference lets us edit the original tasks
    */

    derbyUserToAPI: function(user, options) {
      var uObj;
      if (options == null) {
        options = {};
      }
      _.defaults(options, {
        keepTasks: true,
        asScope: true
      });
      uObj = options.asScope ? user.get() : user;
      _.each(['habit', 'daily', 'todo', 'reward'], function(type) {
        uObj["" + type + "s"] = _.transform(uObj["" + type + "Ids"], function(result, tid) {
          return result.push(uObj.tasks[tid]);
        });
        if (!options.keepTasks) {
          return delete uObj["" + type + "Ids"];
        }
      });
      if (!options.keepTasks) {
        delete uObj.tasks;
      }
      return uObj;
    }
  };

}).call(this);


})(require("__browserify_process"))
},{"./items.coffee":3,"lodash":5,"relative-date":7,"moment":8,"__browserify_process":6}],2:[function(require,module,exports){
(function() {
  var HP, XP, hatchingPotions, helpers, items, moment, obj, pets, randomDrop, updateStats, _, _ref,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  moment = require('moment');

  _ = require('lodash');

  helpers = require('./helpers.coffee');

  items = require('./items.coffee');

  _ref = items.items, pets = _ref.pets, hatchingPotions = _ref.hatchingPotions;

  XP = 15;

  HP = 2;

  obj = module.exports = {};

  obj.revive = function(user, options) {
    var candidate, loseThisItem, owned, paths;
    if (options == null) {
      options = {};
    }
    paths = options.paths || {};
    user.stats.hp = 50;
    user.stats.exp = 0;
    user.stats.gp = 0;
    if (user.stats.lvl > 1) {
      user.stats.lvl--;
    }
    loseThisItem = false;
    owned = user.items;
    if (~~owned.armor > 0 || ~~owned.head > 0 || ~~owned.shield > 0 || ~~owned.weapon > 0) {
      while (!loseThisItem) {
        candidate = {
          0: 'armor',
          1: 'head',
          2: 'shield',
          3: 'weapon'
        }[Math.random() * 4 | 0];
        if (owned[candidate] > 0) {
          loseThisItem = candidate;
        }
      }
      user.items[loseThisItem] = 0;
    }
    return ("stats.hp stats.exp stats.gp stats.lvl items." + loseThisItem).split(' ').forEach(function(path) {
      return paths[path] = 1;
    });
  };

  obj.priorityValue = function(priority) {
    if (priority == null) {
      priority = '!';
    }
    switch (priority) {
      case '!':
        return 1;
      case '!!':
        return 1.5;
      case '!!!':
        return 2;
      default:
        return 1;
    }
  };

  obj.tnl = function(level) {
    var value;
    if (level >= 100) {
      value = 0;
    } else {
      value = Math.round(((Math.pow(level, 2) * 0.25) + (10 * level) + 139.75) / 10) * 10;
    }
    return value;
  };

  /*
    Calculates Exp modificaiton based on level and weapon strength
    {value} task.value for exp gain
    {weaponStrength) weapon strength
    {level} current user level
    {priority} user-defined priority multiplier
  */


  obj.expModifier = function(value, weaponStr, level, priority) {
    var exp, str, strMod, totalStr;
    if (priority == null) {
      priority = '!';
    }
    str = (level - 1) / 2;
    totalStr = (str + weaponStr) / 100;
    strMod = 1 + totalStr;
    exp = value * XP * strMod * obj.priorityValue(priority);
    return Math.round(exp);
  };

  /*
    Calculates HP modification based on level and armor defence
    {value} task.value for hp loss
    {armorDefense} defense from armor
    {helmDefense} defense from helm
    {level} current user level
    {priority} user-defined priority multiplier
  */


  obj.hpModifier = function(value, armorDef, helmDef, shieldDef, level, priority) {
    var def, defMod, hp, totalDef;
    if (priority == null) {
      priority = '!';
    }
    def = (level - 1) / 2;
    totalDef = (def + armorDef + helmDef + shieldDef) / 100;
    defMod = 1 - totalDef;
    hp = value * HP * defMod * obj.priorityValue(priority);
    return Math.round(hp * 10) / 10;
  };

  /*
    Future use
    {priority} user-defined priority multiplier
  */


  obj.gpModifier = function(value, modifier, priority, streak, user) {
    var afterStreak, streakBonus, val;
    if (priority == null) {
      priority = '!';
    }
    val = value * modifier * obj.priorityValue(priority);
    if (streak && user) {
      streakBonus = streak / 100 + 1;
      afterStreak = val * streakBonus;
      if (val > 0) {
        (user._tmp != null ? user._tmp : user._tmp = {}).streakBonus = afterStreak - val;
      }
      return afterStreak;
    } else {
      return val;
    }
  };

  /*
    Calculates the next task.value based on direction
    Uses a capped inverse log y=.95^x, y>= -5
    {currentValue} the current value of the task
    {direction} up or down
  */


  obj.taskDeltaFormula = function(currentValue, direction) {
    var delta;
    if (currentValue < -47.27) {
      currentValue = -47.27;
    } else if (currentValue > 21.27) {
      currentValue = 21.27;
    }
    delta = Math.pow(0.9747, currentValue);
    if (direction === 'up') {
      return delta;
    }
    return -delta;
  };

  /*
    Drop System
  */


  randomDrop = function(user, delta, priority, streak, options) {
    var acceptableDrops, chanceMultiplier, drop, paths, rarity, reachedDropLimit, _base, _base1, _base2, _ref1;
    if (streak == null) {
      streak = 0;
    }
    if (options == null) {
      options = {};
    }
    paths = options.paths || {};
    if ((_base = user.items).lastDrop == null) {
      _base.lastDrop = {
        date: +moment().subtract('d', 1),
        count: 0
      };
    }
    paths['items.lastDrop'] = true;
    reachedDropLimit = (helpers.daysBetween(user.items.lastDrop.date, +(new Date)) === 0) && (user.items.lastDrop.count >= 2);
    if (reachedDropLimit) {
      return;
    }
    chanceMultiplier = Math.abs(delta);
    chanceMultiplier *= obj.priorityValue(priority);
    chanceMultiplier += streak;
    if (((_ref1 = user.flags) != null ? _ref1.dropsEnabled : void 0) && Math.random() < (.05 * chanceMultiplier)) {
      rarity = Math.random();
      if (rarity > .5) {
        drop = helpers.randomVal(pets);
        ((_base1 = user.items).eggs != null ? (_base1 = user.items).eggs : _base1.eggs = []).push(drop);
        paths['items.eggs'] = true;
        drop.type = 'Egg';
        drop.dialog = "You've found a " + drop.text + " Egg! " + drop.notes;
      } else {
        acceptableDrops = [];
        if (rarity < .1) {
          acceptableDrops = ['Base', 'White', 'Desert', 'Red', 'Shade', 'Skeleton', 'Zombie', 'CottonCandyPink', 'CottonCandyBlue', 'Golden'];
        } else if (rarity < .2) {
          acceptableDrops = ['Base', 'White', 'Desert', 'Red', 'Shade', 'Skeleton', 'Zombie', 'CottonCandyPink', 'CottonCandyBlue'];
        } else if (rarity < .3) {
          acceptableDrops = ['Base', 'White', 'Desert', 'Red', 'Shade', 'Skeleton'];
        } else {
          acceptableDrops = ['Base', 'White', 'Desert'];
        }
        acceptableDrops = hatchingPotions.filter(function(hatchingPotion) {
          var _ref2;
          return _ref2 = hatchingPotion.name, __indexOf.call(acceptableDrops, _ref2) >= 0;
        });
        drop = helpers.randomVal(acceptableDrops);
        ((_base2 = user.items).hatchingPotions != null ? (_base2 = user.items).hatchingPotions : _base2.hatchingPotions = []).push(drop.name);
        paths['items.hatchingPotions'] = true;
        drop.type = 'HatchingPotion';
        drop.dialog = "You've found a " + drop.text + " Hatching Potion! " + drop.notes;
      }
      (user._tmp != null ? user._tmp : user._tmp = {}).drop = drop;
      user.items.lastDrop.date = +(new Date);
      user.items.lastDrop.count++;
      return paths['items.lastDrop'] = true;
    }
  };

  obj.score = function(user, task, direction, options) {
    var addPoints, calculateDelta, cron, delta, exp, gp, hp, lvl, num, paths, priority, streak, subtractPoints, times, type, value, _ref1, _ref2;
    if (options == null) {
      options = {};
    }
    _ref1 = user.stats, gp = _ref1.gp, hp = _ref1.hp, exp = _ref1.exp, lvl = _ref1.lvl;
    type = task.type, value = task.value, streak = task.streak;
    _ref2 = [options.paths || {}, options.times || 1, options.cron || false], paths = _ref2[0], times = _ref2[1], cron = _ref2[2];
    priority = task.priority || '!';
    if (task.value > user.stats.gp && task.type === 'reward') {
      return;
    }
    delta = 0;
    calculateDelta = function(adjustvalue) {
      if (adjustvalue == null) {
        adjustvalue = true;
      }
      return _.times(times, function() {
        var nextDelta;
        nextDelta = obj.taskDeltaFormula(value, direction);
        if (adjustvalue) {
          value += nextDelta;
        }
        return delta += nextDelta;
      });
    };
    addPoints = function() {
      var weaponStr;
      weaponStr = items.getItem('weapon', user.items.weapon).strength;
      exp += obj.expModifier(delta, weaponStr, user.stats.lvl, priority) / 2;
      if (streak) {
        return gp += obj.gpModifier(delta, 1, priority, streak, user);
      } else {
        return gp += obj.gpModifier(delta, 1, priority);
      }
    };
    subtractPoints = function() {
      var armorDef, headDef, shieldDef;
      armorDef = items.getItem('armor', user.items.armor).defense;
      headDef = items.getItem('head', user.items.head).defense;
      shieldDef = items.getItem('shield', user.items.shield).defense;
      return hp += obj.hpModifier(delta, armorDef, headDef, shieldDef, user.stats.lvl, priority);
    };
    switch (type) {
      case 'habit':
        calculateDelta();
        if (delta > 0) {
          addPoints();
        } else {
          subtractPoints();
        }
        if (task.value !== value) {
          (task.history != null ? task.history : task.history = []).push({
            date: +(new Date),
            value: value
          });
          paths["tasks." + task.id + ".history"] = true;
        }
        break;
      case 'daily':
        if (cron) {
          calculateDelta();
          subtractPoints();
          task.streak = 0;
        } else {
          calculateDelta();
          addPoints();
          if (direction === 'up') {
            streak = streak ? streak + 1 : 1;
          } else {
            streak = streak ? streak - 1 : 0;
          }
          task.streak = streak;
        }
        paths["tasks." + task.id + ".streak"] = true;
        break;
      case 'todo':
        if (cron) {
          calculateDelta();
        } else {
          calculateDelta();
          addPoints();
        }
        break;
      case 'reward':
        calculateDelta(false);
        gp -= Math.abs(task.value);
        num = parseFloat(task.value).toFixed(2);
        if (gp < 0) {
          hp += gp;
          gp = 0;
        }
    }
    task.value = value;
    paths["tasks." + task.id + ".value"] = true;
    updateStats(user, {
      hp: hp,
      exp: exp,
      gp: gp
    }, {
      paths: paths
    });
    if (direction === 'up') {
      randomDrop(user, delta, priority, streak, {
        paths: paths
      });
    }
    return delta;
  };

  /*
    Updates user stats with new stats. Handles death, leveling up, etc
    {stats} new stats
    {update} if aggregated changes, pass in userObj as update. otherwise commits will be made immediately
  */


  updateStats = function(user, newStats, options) {
    var gp, paths, tnl;
    if (options == null) {
      options = {};
    }
    paths = options.paths || {};
    if (user.stats.hp <= 0) {
      return;
    }
    if (newStats.hp != null) {
      if (newStats.hp <= 0) {
        user.stats.hp = 0;
        paths['stats.hp'] = true;
        return;
      } else {
        user.stats.hp = newStats.hp;
        paths['stats.hp'] = true;
      }
    }
    if (newStats.exp != null) {
      tnl = obj.tnl(user.stats.lvl);
      if (user.stats.lvl >= 100) {
        newStats.gp += newStats.exp / 15;
        newStats.exp = 0;
        user.stats.lvl = 100;
      } else {
        if (newStats.exp >= tnl) {
          user.stats.exp = newStats.exp;
          while (newStats.exp >= tnl && user.stats.lvl < 100) {
            newStats.exp -= tnl;
            user.stats.lvl++;
            tnl = obj.tnl(user.stats.lvl);
          }
          if (user.stats.lvl === 100) {
            newStats.exp = 0;
          }
          user.stats.hp = 50;
        }
      }
      user.stats.exp = newStats.exp;
      paths["stats.exp"] = true;
      paths['stats.lvl'] = true;
      paths['stats.gp'] = true;
      paths['stats.hp'] = true;
      if (user.flags == null) {
        user.flags = {};
      }
      if (!user.flags.customizationsNotification && (user.stats.exp > 10 || user.stats.lvl > 1)) {
        user.flags.customizationsNotification = true;
        paths['flags.customizationsNotification'] = true;
      }
      if (!user.flags.itemsEnabled && user.stats.lvl >= 2) {
        user.flags.itemsEnabled = true;
        paths['flags.itemsEnabled'] = true;
      }
      if (!user.flags.partyEnabled && user.stats.lvl >= 3) {
        user.flags.partyEnabled = true;
        paths['flags.partyEnabled'] = true;
      }
      if (!user.flags.dropsEnabled && user.stats.lvl >= 4) {
        user.flags.dropsEnabled = true;
        paths['flags.dropsEnabled'] = true;
      }
    }
    if (newStats.gp != null) {
      if ((typeof gp === "undefined" || gp === null) || gp < 0) {
        gp = 0.0;
      }
      return user.stats.gp = newStats.gp;
    }
  };

  /*
    At end of day, add value to all incomplete Daily & Todo tasks (further incentive)
    For incomplete Dailys, deduct experience
    Make sure to run this function once in a while as server will not take care of overnight calculations.
    And you have to run it every time client connects.
    {user}
  */


  obj.cron = function(user, options) {
    var daysMissed, expTally, lvl, now, paths, todoTally, _base, _base1, _ref1, _ref2;
    if (options == null) {
      options = {};
    }
    _ref1 = [options.paths || {}, +options.now || +(new Date)], paths = _ref1[0], now = _ref1[1];
    if ((user.lastCron == null) || user.lastCron === 'new' || moment(user.lastCron).isAfter(now)) {
      user.lastCron = now;
      paths['lastCron'] = true;
      return;
    }
    daysMissed = helpers.daysBetween(user.lastCron, now, (_ref2 = user.preferences) != null ? _ref2.dayStart : void 0);
    if (!(daysMissed > 0)) {
      return;
    }
    user.lastCron = now;
    paths['lastCron'] = true;
    if (user.flags.rest === true) {
      return;
    }
    todoTally = 0;
    user.todos.concat(user.dailys).forEach(function(task) {
      var absVal, completed, id, repeat, scheduleMisses, type;
      id = task.id, type = task.type, completed = task.completed, repeat = task.repeat;
      if (!completed) {
        scheduleMisses = daysMissed;
        if ((type === 'daily') && repeat) {
          scheduleMisses = 0;
          _.times(daysMissed, function(n) {
            var thatDay, _ref3;
            thatDay = moment(now).subtract('days', n + 1);
            if (helpers.shouldDo(thatDay, repeat, {
              dayStart: (_ref3 = obj.preferences) != null ? _ref3.dayStart : void 0
            })) {
              return scheduleMisses++;
            }
          });
        }
        if (scheduleMisses > 0) {
          obj.score(user, task, 'down', {
            times: scheduleMisses,
            cron: true,
            paths: paths
          });
        }
      }
      switch (type) {
        case 'daily':
          (task.history != null ? task.history : task.history = []).push({
            date: +(new Date),
            value: task.value
          });
          paths["tasks." + task.id + ".history"] = true;
          task.completed = false;
          return paths["tasks." + task.id + ".completed"] = true;
        case 'todo':
          absVal = completed ? Math.abs(task.value) : task.value;
          return todoTally += absVal;
      }
    });
    user.habits.forEach(function(task) {
      if (task.up === false || task.down === false) {
        if (Math.abs(task.value) < 0.1) {
          task.value = 0;
        } else {
          task.value = task.value / 2;
        }
        return paths["tasks." + task.id + ".value"] = true;
      }
    });
    ((_base = (user.history != null ? user.history : user.history = {})).todos != null ? (_base = (user.history != null ? user.history : user.history = {})).todos : _base.todos = []).push({
      date: now,
      value: todoTally
    });
    expTally = user.stats.exp;
    lvl = 0;
    while (lvl < (user.stats.lvl - 1)) {
      lvl++;
      expTally += obj.tnl(lvl);
    }
    ((_base1 = user.history).exp != null ? (_base1 = user.history).exp : _base1.exp = []).push({
      date: now,
      value: expTally
    });
    paths["history"] = true;
    return user;
  };

}).call(this);


},{"./items.coffee":3,"./helpers.coffee":4,"lodash":5,"moment":8}],5:[function(require,module,exports){
(function(global){/**
 * @license
 * Lo-Dash 1.3.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modern -o ./dist/lodash.js`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.4.4 <http://underscorejs.org/>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
 * Available under MIT license <http://lodash.com/license>
 */
;(function(window) {

  /** Used as a safe reference for `undefined` in pre ES5 environments */
  var undefined;

  /** Used to pool arrays and objects used internally */
  var arrayPool = [],
      objectPool = [];

  /** Used to generate unique IDs */
  var idCounter = 0;

  /** Used internally to indicate various things */
  var indicatorObject = {};

  /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */
  var keyPrefix = +new Date + '';

  /** Used as the size when optimizations are enabled for large arrays */
  var largeArraySize = 75;

  /** Used as the max size of the `arrayPool` and `objectPool` */
  var maxPoolSize = 40;

  /** Used to match empty string literals in compiled template source */
  var reEmptyStringLeading = /\b__p \+= '';/g,
      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

  /** Used to match HTML entities */
  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g;

  /**
   * Used to match ES6 template delimiters
   * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-7.8.6
   */
  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

  /** Used to match regexp flags from their coerced string values */
  var reFlags = /\w*$/;

  /** Used to match "interpolate" template delimiters */
  var reInterpolate = /<%=([\s\S]+?)%>/g;

  /** Used to detect functions containing a `this` reference */
  var reThis = (reThis = /\bthis\b/) && reThis.test(runInContext) && reThis;

  /** Used to detect and test whitespace */
  var whitespace = (
    // whitespace
    ' \t\x0B\f\xA0\ufeff' +

    // line terminators
    '\n\r\u2028\u2029' +

    // unicode category "Zs" space separators
    '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
  );

  /** Used to match leading whitespace and zeros to be removed */
  var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)');

  /** Used to ensure capturing order of template delimiters */
  var reNoMatch = /($^)/;

  /** Used to match HTML characters */
  var reUnescapedHtml = /[&<>"']/g;

  /** Used to match unescaped characters in compiled string literals */
  var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;

  /** Used to assign default `context` object properties */
  var contextProps = [
    'Array', 'Boolean', 'Date', 'Function', 'Math', 'Number', 'Object',
    'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
    'parseInt', 'setImmediate', 'setTimeout'
  ];

  /** Used to make template sourceURLs easier to identify */
  var templateCounter = 0;

  /** `Object#toString` result shortcuts */
  var argsClass = '[object Arguments]',
      arrayClass = '[object Array]',
      boolClass = '[object Boolean]',
      dateClass = '[object Date]',
      errorClass = '[object Error]',
      funcClass = '[object Function]',
      numberClass = '[object Number]',
      objectClass = '[object Object]',
      regexpClass = '[object RegExp]',
      stringClass = '[object String]';

  /** Used to identify object classifications that `_.clone` supports */
  var cloneableClasses = {};
  cloneableClasses[funcClass] = false;
  cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
  cloneableClasses[boolClass] = cloneableClasses[dateClass] =
  cloneableClasses[numberClass] = cloneableClasses[objectClass] =
  cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;

  /** Used to determine if values are of the language type Object */
  var objectTypes = {
    'boolean': false,
    'function': true,
    'object': true,
    'number': false,
    'string': false,
    'undefined': false
  };

  /** Used to escape characters for inclusion in compiled string literals */
  var stringEscapes = {
    '\\': '\\',
    "'": "'",
    '\n': 'n',
    '\r': 'r',
    '\t': 't',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  /** Detect free variable `exports` */
  var freeExports = objectTypes[typeof exports] && exports;

  /** Detect free variable `module` */
  var freeModule = objectTypes[typeof module] && module && module.exports == freeExports && module;

  /** Detect free variable `global`, from Node.js or Browserified code, and use it as `window` */
  var freeGlobal = objectTypes[typeof global] && global;
  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
    window = freeGlobal;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * A basic implementation of `_.indexOf` without support for binary searches
   * or `fromIndex` constraints.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {Mixed} value The value to search for.
   * @param {Number} [fromIndex=0] The index to search from.
   * @returns {Number} Returns the index of the matched value or `-1`.
   */
  function basicIndexOf(array, value, fromIndex) {
    var index = (fromIndex || 0) - 1,
        length = array.length;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * An implementation of `_.contains` for cache objects that mimics the return
   * signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
   *
   * @private
   * @param {Object} cache The cache object to inspect.
   * @param {Mixed} value The value to search for.
   * @returns {Number} Returns `0` if `value` is found, else `-1`.
   */
  function cacheIndexOf(cache, value) {
    var type = typeof value;
    cache = cache.cache;

    if (type == 'boolean' || value == null) {
      return cache[value];
    }
    if (type != 'number' && type != 'string') {
      type = 'object';
    }
    var key = type == 'number' ? value : keyPrefix + value;
    cache = cache[type] || (cache[type] = {});

    return type == 'object'
      ? (cache[key] && basicIndexOf(cache[key], value) > -1 ? 0 : -1)
      : (cache[key] ? 0 : -1);
  }

  /**
   * Adds a given `value` to the corresponding cache object.
   *
   * @private
   * @param {Mixed} value The value to add to the cache.
   */
  function cachePush(value) {
    var cache = this.cache,
        type = typeof value;

    if (type == 'boolean' || value == null) {
      cache[value] = true;
    } else {
      if (type != 'number' && type != 'string') {
        type = 'object';
      }
      var key = type == 'number' ? value : keyPrefix + value,
          typeCache = cache[type] || (cache[type] = {});

      if (type == 'object') {
        if ((typeCache[key] || (typeCache[key] = [])).push(value) == this.array.length) {
          cache[type] = false;
        }
      } else {
        typeCache[key] = true;
      }
    }
  }

  /**
   * Used by `_.max` and `_.min` as the default `callback` when a given
   * `collection` is a string value.
   *
   * @private
   * @param {String} value The character to inspect.
   * @returns {Number} Returns the code unit of given character.
   */
  function charAtCallback(value) {
    return value.charCodeAt(0);
  }

  /**
   * Used by `sortBy` to compare transformed `collection` values, stable sorting
   * them in ascending order.
   *
   * @private
   * @param {Object} a The object to compare to `b`.
   * @param {Object} b The object to compare to `a`.
   * @returns {Number} Returns the sort order indicator of `1` or `-1`.
   */
  function compareAscending(a, b) {
    var ai = a.index,
        bi = b.index;

    a = a.criteria;
    b = b.criteria;

    // ensure a stable sort in V8 and other engines
    // http://code.google.com/p/v8/issues/detail?id=90
    if (a !== b) {
      if (a > b || typeof a == 'undefined') {
        return 1;
      }
      if (a < b || typeof b == 'undefined') {
        return -1;
      }
    }
    return ai < bi ? -1 : 1;
  }

  /**
   * Creates a cache object to optimize linear searches of large arrays.
   *
   * @private
   * @param {Array} [array=[]] The array to search.
   * @returns {Null|Object} Returns the cache object or `null` if caching should not be used.
   */
  function createCache(array) {
    var index = -1,
        length = array.length;

    var cache = getObject();
    cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false;

    var result = getObject();
    result.array = array;
    result.cache = cache;
    result.push = cachePush;

    while (++index < length) {
      result.push(array[index]);
    }
    return cache.object === false
      ? (releaseObject(result), null)
      : result;
  }

  /**
   * Used by `template` to escape characters for inclusion in compiled
   * string literals.
   *
   * @private
   * @param {String} match The matched character to escape.
   * @returns {String} Returns the escaped character.
   */
  function escapeStringChar(match) {
    return '\\' + stringEscapes[match];
  }

  /**
   * Gets an array from the array pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Array} The array from the pool.
   */
  function getArray() {
    return arrayPool.pop() || [];
  }

  /**
   * Gets an object from the object pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Object} The object from the pool.
   */
  function getObject() {
    return objectPool.pop() || {
      'array': null,
      'cache': null,
      'criteria': null,
      'false': false,
      'index': 0,
      'leading': false,
      'maxWait': 0,
      'null': false,
      'number': null,
      'object': null,
      'push': null,
      'string': null,
      'trailing': false,
      'true': false,
      'undefined': false,
      'value': null
    };
  }

  /**
   * A no-operation function.
   *
   * @private
   */
  function noop() {
    // no operation performed
  }

  /**
   * Releases the given `array` back to the array pool.
   *
   * @private
   * @param {Array} [array] The array to release.
   */
  function releaseArray(array) {
    array.length = 0;
    if (arrayPool.length < maxPoolSize) {
      arrayPool.push(array);
    }
  }

  /**
   * Releases the given `object` back to the object pool.
   *
   * @private
   * @param {Object} [object] The object to release.
   */
  function releaseObject(object) {
    var cache = object.cache;
    if (cache) {
      releaseObject(cache);
    }
    object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null;
    if (objectPool.length < maxPoolSize) {
      objectPool.push(object);
    }
  }

  /**
   * Slices the `collection` from the `start` index up to, but not including,
   * the `end` index.
   *
   * Note: This function is used, instead of `Array#slice`, to support node lists
   * in IE < 9 and to ensure dense arrays are returned.
   *
   * @private
   * @param {Array|Object|String} collection The collection to slice.
   * @param {Number} start The start index.
   * @param {Number} end The end index.
   * @returns {Array} Returns the new array.
   */
  function slice(array, start, end) {
    start || (start = 0);
    if (typeof end == 'undefined') {
      end = array ? array.length : 0;
    }
    var index = -1,
        length = end - start || 0,
        result = Array(length < 0 ? 0 : length);

    while (++index < length) {
      result[index] = array[start + index];
    }
    return result;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new `lodash` function using the given `context` object.
   *
   * @static
   * @memberOf _
   * @category Utilities
   * @param {Object} [context=window] The context object.
   * @returns {Function} Returns the `lodash` function.
   */
  function runInContext(context) {
    // Avoid issues with some ES3 environments that attempt to use values, named
    // after built-in constructors like `Object`, for the creation of literals.
    // ES5 clears this up by stating that literals must use built-in constructors.
    // See http://es5.github.com/#x11.1.5.
    context = context ? _.defaults(window.Object(), context, _.pick(window, contextProps)) : window;

    /** Native constructor references */
    var Array = context.Array,
        Boolean = context.Boolean,
        Date = context.Date,
        Function = context.Function,
        Math = context.Math,
        Number = context.Number,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /**
     * Used for `Array` method references.
     *
     * Normally `Array.prototype` would suffice, however, using an array literal
     * avoids issues in Narwhal.
     */
    var arrayRef = [];

    /** Used for native method references */
    var objectProto = Object.prototype,
        stringProto = String.prototype;

    /** Used to restore the original `_` reference in `noConflict` */
    var oldDash = context._;

    /** Used to detect if a method is native */
    var reNative = RegExp('^' +
      String(objectProto.valueOf)
        .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
        .replace(/valueOf|for [^\]]+/g, '.+?') + '$'
    );

    /** Native method shortcuts */
    var ceil = Math.ceil,
        clearTimeout = context.clearTimeout,
        concat = arrayRef.concat,
        floor = Math.floor,
        fnToString = Function.prototype.toString,
        getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
        hasOwnProperty = objectProto.hasOwnProperty,
        push = arrayRef.push,
        propertyIsEnumerable = objectProto.propertyIsEnumerable,
        setImmediate = context.setImmediate,
        setTimeout = context.setTimeout,
        toString = objectProto.toString;

    /* Native method shortcuts for methods with the same name as other `lodash` methods */
    var nativeBind = reNative.test(nativeBind = toString.bind) && nativeBind,
        nativeCreate = reNative.test(nativeCreate =  Object.create) && nativeCreate,
        nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray,
        nativeIsFinite = context.isFinite,
        nativeIsNaN = context.isNaN,
        nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys,
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random,
        nativeSlice = arrayRef.slice;

    /** Detect various environments */
    var isIeOpera = reNative.test(context.attachEvent),
        isV8 = nativeBind && !/\n|true/.test(nativeBind + isIeOpera);

    /** Used to lookup a built-in constructor by [[Class]] */
    var ctorByClass = {};
    ctorByClass[arrayClass] = Array;
    ctorByClass[boolClass] = Boolean;
    ctorByClass[dateClass] = Date;
    ctorByClass[funcClass] = Function;
    ctorByClass[objectClass] = Object;
    ctorByClass[numberClass] = Number;
    ctorByClass[regexpClass] = RegExp;
    ctorByClass[stringClass] = String;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object, which wraps the given `value`, to enable method
     * chaining.
     *
     * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
     * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
     * and `unshift`
     *
     * Chaining is supported in custom builds as long as the `value` method is
     * implicitly or explicitly included in the build.
     *
     * The chainable wrapper functions are:
     * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
     * `compose`, `concat`, `countBy`, `createCallback`, `debounce`, `defaults`,
     * `defer`, `delay`, `difference`, `filter`, `flatten`, `forEach`, `forIn`,
     * `forOwn`, `functions`, `groupBy`, `initial`, `intersection`, `invert`,
     * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
     * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `push`, `range`,
     * `reject`, `rest`, `reverse`, `shuffle`, `slice`, `sort`, `sortBy`, `splice`,
     * `tap`, `throttle`, `times`, `toArray`, `transform`, `union`, `uniq`, `unshift`,
     * `unzip`, `values`, `where`, `without`, `wrap`, and `zip`
     *
     * The non-chainable wrapper functions are:
     * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `has`,
     * `identity`, `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`,
     * `isElement`, `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`,
     * `isNull`, `isNumber`, `isObject`, `isPlainObject`, `isRegExp`, `isString`,
     * `isUndefined`, `join`, `lastIndexOf`, `mixin`, `noConflict`, `parseInt`,
     * `pop`, `random`, `reduce`, `reduceRight`, `result`, `shift`, `size`, `some`,
     * `sortedIndex`, `runInContext`, `template`, `unescape`, `uniqueId`, and `value`
     *
     * The wrapper functions `first` and `last` return wrapped values when `n` is
     * passed, otherwise they return unwrapped values.
     *
     * @name _
     * @constructor
     * @alias chain
     * @category Chaining
     * @param {Mixed} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns a `lodash` instance.
     * @example
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // returns an unwrapped value
     * wrapped.reduce(function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * // returns a wrapped value
     * var squares = wrapped.map(function(num) {
     *   return num * num;
     * });
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
      return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
       ? value
       : new lodashWrapper(value);
    }

    /**
     * A fast path for creating `lodash` wrapper objects.
     *
     * @private
     * @param {Mixed} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns a `lodash` instance.
     */
    function lodashWrapper(value) {
      this.__wrapped__ = value;
    }
    // ensure `new lodashWrapper` is an instance of `lodash`
    lodashWrapper.prototype = lodash.prototype;

    /**
     * An object used to flag environments features.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    var support = lodash.support = {};

    /**
     * Detect if `Function#bind` exists and is inferred to be fast (all but V8).
     *
     * @memberOf _.support
     * @type Boolean
     */
    support.fastBind = nativeBind && !isV8;

    /**
     * By default, the template delimiters used by Lo-Dash are similar to those in
     * embedded Ruby (ERB). Change the following template settings to use alternative
     * delimiters.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    lodash.templateSettings = {

      /**
       * Used to detect `data` property values to be HTML-escaped.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'escape': /<%-([\s\S]+?)%>/g,

      /**
       * Used to detect code to be evaluated.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'evaluate': /<%([\s\S]+?)%>/g,

      /**
       * Used to detect `data` property values to inject.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'interpolate': reInterpolate,

      /**
       * Used to reference the data object in the template text.
       *
       * @memberOf _.templateSettings
       * @type String
       */
      'variable': '',

      /**
       * Used to import variables into the compiled template.
       *
       * @memberOf _.templateSettings
       * @type Object
       */
      'imports': {

        /**
         * A reference to the `lodash` function.
         *
         * @memberOf _.templateSettings.imports
         * @type Function
         */
        '_': lodash
      }
    };

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a function that, when called, invokes `func` with the `this` binding
     * of `thisArg` and prepends any `partialArgs` to the arguments passed to the
     * bound function.
     *
     * @private
     * @param {Function|String} func The function to bind or the method name.
     * @param {Mixed} [thisArg] The `this` binding of `func`.
     * @param {Array} partialArgs An array of arguments to be partially applied.
     * @param {Object} [idicator] Used to indicate binding by key or partially
     *  applying arguments from the right.
     * @returns {Function} Returns the new bound function.
     */
    function createBound(func, thisArg, partialArgs, indicator) {
      var isFunc = isFunction(func),
          isPartial = !partialArgs,
          key = thisArg;

      // juggle arguments
      if (isPartial) {
        var rightIndicator = indicator;
        partialArgs = thisArg;
      }
      else if (!isFunc) {
        if (!indicator) {
          throw new TypeError;
        }
        thisArg = func;
      }

      function bound() {
        // `Function#bind` spec
        // http://es5.github.com/#x15.3.4.5
        var args = arguments,
            thisBinding = isPartial ? this : thisArg;

        if (!isFunc) {
          func = thisArg[key];
        }
        if (partialArgs.length) {
          args = args.length
            ? (args = nativeSlice.call(args), rightIndicator ? args.concat(partialArgs) : partialArgs.concat(args))
            : partialArgs;
        }
        if (this instanceof bound) {
          // ensure `new bound` is an instance of `func`
          thisBinding = createObject(func.prototype);

          // mimic the constructor's `return` behavior
          // http://es5.github.com/#x13.2.2
          var result = func.apply(thisBinding, args);
          return isObject(result) ? result : thisBinding;
        }
        return func.apply(thisBinding, args);
      }
      return bound;
    }

    /**
     * Creates a new object with the specified `prototype`.
     *
     * @private
     * @param {Object} prototype The prototype object.
     * @returns {Object} Returns the new object.
     */
    function createObject(prototype) {
      return isObject(prototype) ? nativeCreate(prototype) : {};
    }

    /**
     * Used by `escape` to convert characters to HTML entities.
     *
     * @private
     * @param {String} match The matched character to escape.
     * @returns {String} Returns the escaped character.
     */
    function escapeHtmlChar(match) {
      return htmlEscapes[match];
    }

    /**
     * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
     * customized, this method returns the custom method, otherwise it returns
     * the `basicIndexOf` function.
     *
     * @private
     * @returns {Function} Returns the "indexOf" function.
     */
    function getIndexOf(array, value, fromIndex) {
      var result = (result = lodash.indexOf) === indexOf ? basicIndexOf : result;
      return result;
    }

    /**
     * Creates a function that juggles arguments, allowing argument overloading
     * for `_.flatten` and `_.uniq`, before passing them to the given `func`.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @returns {Function} Returns the new function.
     */
    function overloadWrapper(func) {
      return function(array, flag, callback, thisArg) {
        // juggle arguments
        if (typeof flag != 'boolean' && flag != null) {
          thisArg = callback;
          callback = !(thisArg && thisArg[flag] === array) ? flag : undefined;
          flag = false;
        }
        if (callback != null) {
          callback = lodash.createCallback(callback, thisArg);
        }
        return func(array, flag, callback, thisArg);
      };
    }

    /**
     * A fallback implementation of `isPlainObject` which checks if a given `value`
     * is an object created by the `Object` constructor, assuming objects created
     * by the `Object` constructor have no inherited enumerable properties and that
     * there are no `Object.prototype` extensions.
     *
     * @private
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if `value` is a plain object, else `false`.
     */
    function shimIsPlainObject(value) {
      var ctor,
          result;

      // avoid non Object objects, `arguments` objects, and DOM elements
      if (!(value && toString.call(value) == objectClass) ||
          (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor))) {
        return false;
      }
      // In most environments an object's own properties are iterated before
      // its inherited properties. If the last iterated property is an object's
      // own property then there are no inherited enumerable properties.
      forIn(value, function(value, key) {
        result = key;
      });
      return result === undefined || hasOwnProperty.call(value, result);
    }

    /**
     * Used by `unescape` to convert HTML entities to characters.
     *
     * @private
     * @param {String} match The matched character to unescape.
     * @returns {String} Returns the unescaped character.
     */
    function unescapeHtmlChar(match) {
      return htmlUnescapes[match];
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Checks if `value` is an `arguments` object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is an `arguments` object, else `false`.
     * @example
     *
     * (function() { return _.isArguments(arguments); })(1, 2, 3);
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    function isArguments(value) {
      return toString.call(value) == argsClass;
    }

    /**
     * Checks if `value` is an array.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is an array, else `false`.
     * @example
     *
     * (function() { return _.isArray(arguments); })();
     * // => false
     *
     * _.isArray([1, 2, 3]);
     * // => true
     */
    var isArray = nativeIsArray;

    /**
     * A fallback implementation of `Object.keys` which produces an array of the
     * given object's own enumerable property names.
     *
     * @private
     * @type Function
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns a new array of property names.
     */
    var shimKeys = function (object) {
      var index, iterable = object, result = [];
      if (!iterable) return result;
      if (!(objectTypes[typeof object])) return result;    
        for (index in iterable) {
          if (hasOwnProperty.call(iterable, index)) {
            result.push(index);    
          }
        }    
      return result
    };

    /**
     * Creates an array composed of the own enumerable property names of `object`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns a new array of property names.
     * @example
     *
     * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
     * // => ['one', 'two', 'three'] (order is not guaranteed)
     */
    var keys = !nativeKeys ? shimKeys : function(object) {
      if (!isObject(object)) {
        return [];
      }
      return nativeKeys(object);
    };

    /**
     * Used to convert characters to HTML entities:
     *
     * Though the `>` character is escaped for symmetry, characters like `>` and `/`
     * don't require escaping in HTML and have no special meaning unless they're part
     * of a tag or an unquoted attribute value.
     * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
     */
    var htmlEscapes = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;'
    };

    /** Used to convert HTML entities to characters */
    var htmlUnescapes = invert(htmlEscapes);

    /*--------------------------------------------------------------------------*/

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object. Subsequent sources will overwrite property assignments of previous
     * sources. If a `callback` function is passed, it will be executed to produce
     * the assigned values. The `callback` is bound to `thisArg` and invoked with
     * two arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @type Function
     * @alias extend
     * @category Objects
     * @param {Object} object The destination object.
     * @param {Object} [source1, source2, ...] The source objects.
     * @param {Function} [callback] The function to customize assigning values.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * _.assign({ 'name': 'moe' }, { 'age': 40 });
     * // => { 'name': 'moe', 'age': 40 }
     *
     * var defaults = _.partialRight(_.assign, function(a, b) {
     *   return typeof a == 'undefined' ? b : a;
     * });
     *
     * var food = { 'name': 'apple' };
     * defaults(food, { 'name': 'banana', 'type': 'fruit' });
     * // => { 'name': 'apple', 'type': 'fruit' }
     */
    var assign = function (object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {
        var callback = lodash.createCallback(args[--argsLength - 1], args[argsLength--], 2);
      } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {
        callback = args[--argsLength];
      }
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {    
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];    
        }    
        }
      }
      return result
    };

    /**
     * Creates a clone of `value`. If `deep` is `true`, nested objects will also
     * be cloned, otherwise they will be assigned by reference. If a `callback`
     * function is passed, it will be executed to produce the cloned values. If
     * `callback` returns `undefined`, cloning will be handled by the method instead.
     * The `callback` is bound to `thisArg` and invoked with one argument; (value).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to clone.
     * @param {Boolean} [deep=false] A flag to indicate a deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @param- {Array} [stackA=[]] Tracks traversed source objects.
     * @param- {Array} [stackB=[]] Associates clones with source counterparts.
     * @returns {Mixed} Returns the cloned `value`.
     * @example
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * var shallow = _.clone(stooges);
     * shallow[0] === stooges[0];
     * // => true
     *
     * var deep = _.clone(stooges, true);
     * deep[0] === stooges[0];
     * // => false
     *
     * _.mixin({
     *   'clone': _.partialRight(_.clone, function(value) {
     *     return _.isElement(value) ? value.cloneNode(false) : undefined;
     *   })
     * });
     *
     * var clone = _.clone(document.body);
     * clone.childNodes.length;
     * // => 0
     */
    function clone(value, deep, callback, thisArg, stackA, stackB) {
      var result = value;

      // allows working with "Collections" methods without using their `callback`
      // argument, `index|key`, for this method's `callback`
      if (typeof deep != 'boolean' && deep != null) {
        thisArg = callback;
        callback = deep;
        deep = false;
      }
      if (typeof callback == 'function') {
        callback = (typeof thisArg == 'undefined')
          ? callback
          : lodash.createCallback(callback, thisArg, 1);

        result = callback(result);
        if (typeof result != 'undefined') {
          return result;
        }
        result = value;
      }
      // inspect [[Class]]
      var isObj = isObject(result);
      if (isObj) {
        var className = toString.call(result);
        if (!cloneableClasses[className]) {
          return result;
        }
        var isArr = isArray(result);
      }
      // shallow clone
      if (!isObj || !deep) {
        return isObj
          ? (isArr ? slice(result) : assign({}, result))
          : result;
      }
      var ctor = ctorByClass[className];
      switch (className) {
        case boolClass:
        case dateClass:
          return new ctor(+result);

        case numberClass:
        case stringClass:
          return new ctor(result);

        case regexpClass:
          return ctor(result.source, reFlags.exec(result));
      }
      // check for circular references and return corresponding clone
      var initedStack = !stackA;
      stackA || (stackA = getArray());
      stackB || (stackB = getArray());

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == value) {
          return stackB[length];
        }
      }
      // init cloned object
      result = isArr ? ctor(result.length) : {};

      // add array properties assigned by `RegExp#exec`
      if (isArr) {
        if (hasOwnProperty.call(value, 'index')) {
          result.index = value.index;
        }
        if (hasOwnProperty.call(value, 'input')) {
          result.input = value.input;
        }
      }
      // add the source value to the stack of traversed objects
      // and associate it with its clone
      stackA.push(value);
      stackB.push(result);

      // recursively populate clone (susceptible to call stack limits)
      (isArr ? forEach : forOwn)(value, function(objValue, key) {
        result[key] = clone(objValue, deep, callback, undefined, stackA, stackB);
      });

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * Creates a deep clone of `value`. If a `callback` function is passed,
     * it will be executed to produce the cloned values. If `callback` returns
     * `undefined`, cloning will be handled by the method instead. The `callback`
     * is bound to `thisArg` and invoked with one argument; (value).
     *
     * Note: This method is loosely based on the structured clone algorithm. Functions
     * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
     * objects created by constructors other than `Object` are cloned to plain `Object` objects.
     * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the deep cloned `value`.
     * @example
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * var deep = _.cloneDeep(stooges);
     * deep[0] === stooges[0];
     * // => false
     *
     * var view = {
     *   'label': 'docs',
     *   'node': element
     * };
     *
     * var clone = _.cloneDeep(view, function(value) {
     *   return _.isElement(value) ? value.cloneNode(true) : undefined;
     * });
     *
     * clone.node == view.node;
     * // => false
     */
    function cloneDeep(value, callback, thisArg) {
      return clone(value, true, callback, thisArg);
    }

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object for all destination properties that resolve to `undefined`. Once a
     * property is set, additional defaults of the same property will be ignored.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The destination object.
     * @param {Object} [source1, source2, ...] The source objects.
     * @param- {Object} [guard] Allows working with `_.reduce` without using its
     *  callback's `key` and `object` arguments as sources.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var food = { 'name': 'apple' };
     * _.defaults(food, { 'name': 'banana', 'type': 'fruit' });
     * // => { 'name': 'apple', 'type': 'fruit' }
     */
    var defaults = function (object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {    
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (typeof result[index] == 'undefined') result[index] = iterable[index];    
        }    
        }
      }
      return result
    };

    /**
     * This method is similar to `_.find`, except that it returns the key of the
     * element that passes the callback check, instead of the element itself.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to search.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the key of the found element, else `undefined`.
     * @example
     *
     * _.findKey({ 'a': 1, 'b': 2, 'c': 3, 'd': 4 }, function(num) {
     *   return num % 2 == 0;
     * });
     * // => 'b'
     */
    function findKey(object, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg);
      forOwn(object, function(value, key, object) {
        if (callback(value, key, object)) {
          result = key;
          return false;
        }
      });
      return result;
    }

    /**
     * Iterates over `object`'s own and inherited enumerable properties, executing
     * the `callback` for each property. The `callback` is bound to `thisArg` and
     * invoked with three arguments; (value, key, object). Callbacks may exit iteration
     * early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Dog(name) {
     *   this.name = name;
     * }
     *
     * Dog.prototype.bark = function() {
     *   alert('Woof, woof!');
     * };
     *
     * _.forIn(new Dog('Dagny'), function(value, key) {
     *   alert(key);
     * });
     * // => alerts 'name' and 'bark' (order is not guaranteed)
     */
    var forIn = function (collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : lodash.createCallback(callback, thisArg);    
        for (index in iterable) {
          if (callback(iterable[index], index, collection) === false) return result;    
        }    
      return result
    };

    /**
     * Iterates over an object's own enumerable properties, executing the `callback`
     * for each property. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, key, object). Callbacks may exit iteration early by explicitly
     * returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
     *   alert(key);
     * });
     * // => alerts '0', '1', and 'length' (order is not guaranteed)
     */
    var forOwn = function (collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : lodash.createCallback(callback, thisArg);    
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (callback(iterable[index], index, collection) === false) return result;    
        }    
      return result
    };

    /**
     * Creates a sorted array of all enumerable properties, own and inherited,
     * of `object` that have function values.
     *
     * @static
     * @memberOf _
     * @alias methods
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns a new array of property names that have function values.
     * @example
     *
     * _.functions(_);
     * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
     */
    function functions(object) {
      var result = [];
      forIn(object, function(value, key) {
        if (isFunction(value)) {
          result.push(key);
        }
      });
      return result.sort();
    }

    /**
     * Checks if the specified object `property` exists and is a direct property,
     * instead of an inherited property.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to check.
     * @param {String} property The property to check for.
     * @returns {Boolean} Returns `true` if key is a direct property, else `false`.
     * @example
     *
     * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
     * // => true
     */
    function has(object, property) {
      return object ? hasOwnProperty.call(object, property) : false;
    }

    /**
     * Creates an object composed of the inverted keys and values of the given `object`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to invert.
     * @returns {Object} Returns the created inverted object.
     * @example
     *
     *  _.invert({ 'first': 'moe', 'second': 'larry' });
     * // => { 'moe': 'first', 'larry': 'second' }
     */
    function invert(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = {};

      while (++index < length) {
        var key = props[index];
        result[object[key]] = key;
      }
      return result;
    }

    /**
     * Checks if `value` is a boolean value.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a boolean value, else `false`.
     * @example
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false || toString.call(value) == boolClass;
    }

    /**
     * Checks if `value` is a date.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a date, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     */
    function isDate(value) {
      return value ? (typeof value == 'object' && toString.call(value) == dateClass) : false;
    }

    /**
     * Checks if `value` is a DOM element.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     */
    function isElement(value) {
      return value ? value.nodeType === 1 : false;
    }

    /**
     * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
     * length of `0` and objects with no own enumerable properties are considered
     * "empty".
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object|String} value The value to inspect.
     * @returns {Boolean} Returns `true`, if the `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({});
     * // => true
     *
     * _.isEmpty('');
     * // => true
     */
    function isEmpty(value) {
      var result = true;
      if (!value) {
        return result;
      }
      var className = toString.call(value),
          length = value.length;

      if ((className == arrayClass || className == stringClass || className == argsClass ) ||
          (className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
        return !length;
      }
      forOwn(value, function() {
        return (result = false);
      });
      return result;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent to each other. If `callback` is passed, it will be executed to
     * compare values. If `callback` returns `undefined`, comparisons will be handled
     * by the method instead. The `callback` is bound to `thisArg` and invoked with
     * two arguments; (a, b).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} a The value to compare.
     * @param {Mixed} b The other value to compare.
     * @param {Function} [callback] The function to customize comparing values.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @param- {Array} [stackA=[]] Tracks traversed `a` objects.
     * @param- {Array} [stackB=[]] Tracks traversed `b` objects.
     * @returns {Boolean} Returns `true`, if the values are equivalent, else `false`.
     * @example
     *
     * var moe = { 'name': 'moe', 'age': 40 };
     * var copy = { 'name': 'moe', 'age': 40 };
     *
     * moe == copy;
     * // => false
     *
     * _.isEqual(moe, copy);
     * // => true
     *
     * var words = ['hello', 'goodbye'];
     * var otherWords = ['hi', 'goodbye'];
     *
     * _.isEqual(words, otherWords, function(a, b) {
     *   var reGreet = /^(?:hello|hi)$/i,
     *       aGreet = _.isString(a) && reGreet.test(a),
     *       bGreet = _.isString(b) && reGreet.test(b);
     *
     *   return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
     * });
     * // => true
     */
    function isEqual(a, b, callback, thisArg, stackA, stackB) {
      // used to indicate that when comparing objects, `a` has at least the properties of `b`
      var whereIndicator = callback === indicatorObject;
      if (typeof callback == 'function' && !whereIndicator) {
        callback = lodash.createCallback(callback, thisArg, 2);
        var result = callback(a, b);
        if (typeof result != 'undefined') {
          return !!result;
        }
      }
      // exit early for identical values
      if (a === b) {
        // treat `+0` vs. `-0` as not equal
        return a !== 0 || (1 / a == 1 / b);
      }
      var type = typeof a,
          otherType = typeof b;

      // exit early for unlike primitive values
      if (a === a &&
          (!a || (type != 'function' && type != 'object')) &&
          (!b || (otherType != 'function' && otherType != 'object'))) {
        return false;
      }
      // exit early for `null` and `undefined`, avoiding ES3's Function#call behavior
      // http://es5.github.com/#x15.3.4.4
      if (a == null || b == null) {
        return a === b;
      }
      // compare [[Class]] names
      var className = toString.call(a),
          otherClass = toString.call(b);

      if (className == argsClass) {
        className = objectClass;
      }
      if (otherClass == argsClass) {
        otherClass = objectClass;
      }
      if (className != otherClass) {
        return false;
      }
      switch (className) {
        case boolClass:
        case dateClass:
          // coerce dates and booleans to numbers, dates to milliseconds and booleans
          // to `1` or `0`, treating invalid dates coerced to `NaN` as not equal
          return +a == +b;

        case numberClass:
          // treat `NaN` vs. `NaN` as equal
          return (a != +a)
            ? b != +b
            // but treat `+0` vs. `-0` as not equal
            : (a == 0 ? (1 / a == 1 / b) : a == +b);

        case regexpClass:
        case stringClass:
          // coerce regexes to strings (http://es5.github.com/#x15.10.6.4)
          // treat string primitives and their corresponding object instances as equal
          return a == String(b);
      }
      var isArr = className == arrayClass;
      if (!isArr) {
        // unwrap any `lodash` wrapped values
        if (hasOwnProperty.call(a, '__wrapped__ ') || hasOwnProperty.call(b, '__wrapped__')) {
          return isEqual(a.__wrapped__ || a, b.__wrapped__ || b, callback, thisArg, stackA, stackB);
        }
        // exit for functions and DOM nodes
        if (className != objectClass) {
          return false;
        }
        // in older versions of Opera, `arguments` objects have `Array` constructors
        var ctorA = a.constructor,
            ctorB = b.constructor;

        // non `Object` object instances with different constructors are not equal
        if (ctorA != ctorB && !(
              isFunction(ctorA) && ctorA instanceof ctorA &&
              isFunction(ctorB) && ctorB instanceof ctorB
            )) {
          return false;
        }
      }
      // assume cyclic structures are equal
      // the algorithm for detecting cyclic structures is adapted from ES 5.1
      // section 15.12.3, abstract operation `JO` (http://es5.github.com/#x15.12.3)
      var initedStack = !stackA;
      stackA || (stackA = getArray());
      stackB || (stackB = getArray());

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == a) {
          return stackB[length] == b;
        }
      }
      var size = 0;
      result = true;

      // add `a` and `b` to the stack of traversed objects
      stackA.push(a);
      stackB.push(b);

      // recursively compare objects and arrays (susceptible to call stack limits)
      if (isArr) {
        length = a.length;
        size = b.length;

        // compare lengths to determine if a deep comparison is necessary
        result = size == a.length;
        if (!result && !whereIndicator) {
          return result;
        }
        // deep compare the contents, ignoring non-numeric properties
        while (size--) {
          var index = length,
              value = b[size];

          if (whereIndicator) {
            while (index--) {
              if ((result = isEqual(a[index], value, callback, thisArg, stackA, stackB))) {
                break;
              }
            }
          } else if (!(result = isEqual(a[size], value, callback, thisArg, stackA, stackB))) {
            break;
          }
        }
        return result;
      }
      // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
      // which, in this case, is more costly
      forIn(b, function(value, key, b) {
        if (hasOwnProperty.call(b, key)) {
          // count the number of properties.
          size++;
          // deep compare each property value.
          return (result = hasOwnProperty.call(a, key) && isEqual(a[key], value, callback, thisArg, stackA, stackB));
        }
      });

      if (result && !whereIndicator) {
        // ensure both objects have the same number of properties
        forIn(a, function(value, key, a) {
          if (hasOwnProperty.call(a, key)) {
            // `size` will be `-1` if `a` has more properties than `b`
            return (result = --size > -1);
          }
        });
      }
      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * Checks if `value` is, or can be coerced to, a finite number.
     *
     * Note: This is not the same as native `isFinite`, which will return true for
     * booleans and empty strings. See http://es5.github.com/#x15.1.2.5.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is finite, else `false`.
     * @example
     *
     * _.isFinite(-101);
     * // => true
     *
     * _.isFinite('10');
     * // => true
     *
     * _.isFinite(true);
     * // => false
     *
     * _.isFinite('');
     * // => false
     *
     * _.isFinite(Infinity);
     * // => false
     */
    function isFinite(value) {
      return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
    }

    /**
     * Checks if `value` is a function.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a function, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     */
    function isFunction(value) {
      return typeof value == 'function';
    }

    /**
     * Checks if `value` is the language type of Object.
     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(1);
     * // => false
     */
    function isObject(value) {
      // check if the value is the ECMAScript language type of Object
      // http://es5.github.com/#x8
      // and avoid a V8 bug
      // http://code.google.com/p/v8/issues/detail?id=2291
      return !!(value && objectTypes[typeof value]);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * Note: This is not the same as native `isNaN`, which will return `true` for
     * `undefined` and other values. See http://es5.github.com/#x15.1.2.4.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // `NaN` as a primitive is the only value that is not equal to itself
      // (perform the [[Class]] check first to avoid errors with some host objects in IE)
      return isNumber(value) && value != +value
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(undefined);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is a number.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a number, else `false`.
     * @example
     *
     * _.isNumber(8.4 * 5);
     * // => true
     */
    function isNumber(value) {
      return typeof value == 'number' || toString.call(value) == numberClass;
    }

    /**
     * Checks if a given `value` is an object created by the `Object` constructor.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if `value` is a plain object, else `false`.
     * @example
     *
     * function Stooge(name, age) {
     *   this.name = name;
     *   this.age = age;
     * }
     *
     * _.isPlainObject(new Stooge('moe', 40));
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'name': 'moe', 'age': 40 });
     * // => true
     */
    var isPlainObject = function(value) {
      if (!(value && toString.call(value) == objectClass)) {
        return false;
      }
      var valueOf = value.valueOf,
          objProto = typeof valueOf == 'function' && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);

      return objProto
        ? (value == objProto || getPrototypeOf(value) == objProto)
        : shimIsPlainObject(value);
    };

    /**
     * Checks if `value` is a regular expression.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a regular expression, else `false`.
     * @example
     *
     * _.isRegExp(/moe/);
     * // => true
     */
    function isRegExp(value) {
      return value ? (typeof value == 'object' && toString.call(value) == regexpClass) : false;
    }

    /**
     * Checks if `value` is a string.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is a string, else `false`.
     * @example
     *
     * _.isString('moe');
     * // => true
     */
    function isString(value) {
      return typeof value == 'string' || toString.call(value) == stringClass;
    }

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Mixed} value The value to check.
     * @returns {Boolean} Returns `true`, if the `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     */
    function isUndefined(value) {
      return typeof value == 'undefined';
    }

    /**
     * Recursively merges own enumerable properties of the source object(s), that
     * don't resolve to `undefined`, into the destination object. Subsequent sources
     * will overwrite property assignments of previous sources. If a `callback` function
     * is passed, it will be executed to produce the merged values of the destination
     * and source properties. If `callback` returns `undefined`, merging will be
     * handled by the method instead. The `callback` is bound to `thisArg` and
     * invoked with two arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The destination object.
     * @param {Object} [source1, source2, ...] The source objects.
     * @param {Function} [callback] The function to customize merging properties.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @param- {Object} [deepIndicator] Indicates that `stackA` and `stackB` are
     *  arrays of traversed objects, instead of source objects.
     * @param- {Array} [stackA=[]] Tracks traversed source objects.
     * @param- {Array} [stackB=[]] Associates values with source counterparts.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var names = {
     *   'stooges': [
     *     { 'name': 'moe' },
     *     { 'name': 'larry' }
     *   ]
     * };
     *
     * var ages = {
     *   'stooges': [
     *     { 'age': 40 },
     *     { 'age': 50 }
     *   ]
     * };
     *
     * _.merge(names, ages);
     * // => { 'stooges': [{ 'name': 'moe', 'age': 40 }, { 'name': 'larry', 'age': 50 }] }
     *
     * var food = {
     *   'fruits': ['apple'],
     *   'vegetables': ['beet']
     * };
     *
     * var otherFood = {
     *   'fruits': ['banana'],
     *   'vegetables': ['carrot']
     * };
     *
     * _.merge(food, otherFood, function(a, b) {
     *   return _.isArray(a) ? a.concat(b) : undefined;
     * });
     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
     */
    function merge(object, source, deepIndicator) {
      var args = arguments,
          index = 0,
          length = 2;

      if (!isObject(object)) {
        return object;
      }
      if (deepIndicator === indicatorObject) {
        var callback = args[3],
            stackA = args[4],
            stackB = args[5];
      } else {
        var initedStack = true;
        stackA = getArray();
        stackB = getArray();

        // allows working with `_.reduce` and `_.reduceRight` without
        // using their `callback` arguments, `index|key` and `collection`
        if (typeof deepIndicator != 'number') {
          length = args.length;
        }
        if (length > 3 && typeof args[length - 2] == 'function') {
          callback = lodash.createCallback(args[--length - 1], args[length--], 2);
        } else if (length > 2 && typeof args[length - 1] == 'function') {
          callback = args[--length];
        }
      }
      while (++index < length) {
        (isArray(args[index]) ? forEach : forOwn)(args[index], function(source, key) {
          var found,
              isArr,
              result = source,
              value = object[key];

          if (source && ((isArr = isArray(source)) || isPlainObject(source))) {
            // avoid merging previously merged cyclic sources
            var stackLength = stackA.length;
            while (stackLength--) {
              if ((found = stackA[stackLength] == source)) {
                value = stackB[stackLength];
                break;
              }
            }
            if (!found) {
              var isShallow;
              if (callback) {
                result = callback(value, source);
                if ((isShallow = typeof result != 'undefined')) {
                  value = result;
                }
              }
              if (!isShallow) {
                value = isArr
                  ? (isArray(value) ? value : [])
                  : (isPlainObject(value) ? value : {});
              }
              // add `source` and associated `value` to the stack of traversed objects
              stackA.push(source);
              stackB.push(value);

              // recursively merge objects and arrays (susceptible to call stack limits)
              if (!isShallow) {
                value = merge(value, source, indicatorObject, callback, stackA, stackB);
              }
            }
          }
          else {
            if (callback) {
              result = callback(value, source);
              if (typeof result == 'undefined') {
                result = source;
              }
            }
            if (typeof result != 'undefined') {
              value = result;
            }
          }
          object[key] = value;
        });
      }

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return object;
    }

    /**
     * Creates a shallow clone of `object` excluding the specified properties.
     * Property names may be specified as individual arguments or as arrays of
     * property names. If a `callback` function is passed, it will be executed
     * for each property in the `object`, omitting the properties `callback`
     * returns truthy for. The `callback` is bound to `thisArg` and invoked
     * with three arguments; (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Function|String} callback|[prop1, prop2, ...] The properties to omit
     *  or the function called per iteration.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object without the omitted properties.
     * @example
     *
     * _.omit({ 'name': 'moe', 'age': 40 }, 'age');
     * // => { 'name': 'moe' }
     *
     * _.omit({ 'name': 'moe', 'age': 40 }, function(value) {
     *   return typeof value == 'number';
     * });
     * // => { 'name': 'moe' }
     */
    function omit(object, callback, thisArg) {
      var indexOf = getIndexOf(),
          isFunc = typeof callback == 'function',
          result = {};

      if (isFunc) {
        callback = lodash.createCallback(callback, thisArg);
      } else {
        var props = concat.apply(arrayRef, nativeSlice.call(arguments, 1));
      }
      forIn(object, function(value, key, object) {
        if (isFunc
              ? !callback(value, key, object)
              : indexOf(props, key) < 0
            ) {
          result[key] = value;
        }
      });
      return result;
    }

    /**
     * Creates a two dimensional array of the given object's key-value pairs,
     * i.e. `[[key1, value1], [key2, value2]]`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns new array of key-value pairs.
     * @example
     *
     * _.pairs({ 'moe': 30, 'larry': 40 });
     * // => [['moe', 30], ['larry', 40]] (order is not guaranteed)
     */
    function pairs(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        var key = props[index];
        result[index] = [key, object[key]];
      }
      return result;
    }

    /**
     * Creates a shallow clone of `object` composed of the specified properties.
     * Property names may be specified as individual arguments or as arrays of property
     * names. If `callback` is passed, it will be executed for each property in the
     * `object`, picking the properties `callback` returns truthy for. The `callback`
     * is bound to `thisArg` and invoked with three arguments; (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
     *  per iteration or properties to pick, either as individual arguments or arrays.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object composed of the picked properties.
     * @example
     *
     * _.pick({ 'name': 'moe', '_userid': 'moe1' }, 'name');
     * // => { 'name': 'moe' }
     *
     * _.pick({ 'name': 'moe', '_userid': 'moe1' }, function(value, key) {
     *   return key.charAt(0) != '_';
     * });
     * // => { 'name': 'moe' }
     */
    function pick(object, callback, thisArg) {
      var result = {};
      if (typeof callback != 'function') {
        var index = -1,
            props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
            length = isObject(object) ? props.length : 0;

        while (++index < length) {
          var key = props[index];
          if (key in object) {
            result[key] = object[key];
          }
        }
      } else {
        callback = lodash.createCallback(callback, thisArg);
        forIn(object, function(value, key, object) {
          if (callback(value, key, object)) {
            result[key] = value;
          }
        });
      }
      return result;
    }

    /**
     * An alternative to `_.reduce`, this method transforms an `object` to a new
     * `accumulator` object which is the result of running each of its elements
     * through the `callback`, with each `callback` execution potentially mutating
     * the `accumulator` object. The `callback` is bound to `thisArg` and invoked
     * with four arguments; (accumulator, value, key, object). Callbacks may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [accumulator] The custom accumulator value.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the accumulated value.
     * @example
     *
     * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) {
     *   num *= num;
     *   if (num % 2) {
     *     return result.push(num) < 3;
     *   }
     * });
     * // => [1, 9, 25]
     *
     * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     * });
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function transform(object, callback, accumulator, thisArg) {
      var isArr = isArray(object);
      callback = lodash.createCallback(callback, thisArg, 4);

      if (accumulator == null) {
        if (isArr) {
          accumulator = [];
        } else {
          var ctor = object && object.constructor,
              proto = ctor && ctor.prototype;

          accumulator = createObject(proto);
        }
      }
      (isArr ? forEach : forOwn)(object, function(value, index, object) {
        return callback(accumulator, value, index, object);
      });
      return accumulator;
    }

    /**
     * Creates an array composed of the own enumerable property values of `object`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns a new array of property values.
     * @example
     *
     * _.values({ 'one': 1, 'two': 2, 'three': 3 });
     * // => [1, 2, 3] (order is not guaranteed)
     */
    function values(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        result[index] = object[props[index]];
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array of elements from the specified indexes, or keys, of the
     * `collection`. Indexes may be specified as individual arguments or as arrays
     * of indexes.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Array|Number|String} [index1, index2, ...] The indexes of
     *  `collection` to retrieve, either as individual arguments or arrays.
     * @returns {Array} Returns a new array of elements corresponding to the
     *  provided indexes.
     * @example
     *
     * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
     * // => ['a', 'c', 'e']
     *
     * _.at(['moe', 'larry', 'curly'], 0, 2);
     * // => ['moe', 'curly']
     */
    function at(collection) {
      var index = -1,
          props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
          length = props.length,
          result = Array(length);

      while(++index < length) {
        result[index] = collection[props[index]];
      }
      return result;
    }

    /**
     * Checks if a given `target` element is present in a `collection` using strict
     * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
     * as the offset from the end of the collection.
     *
     * @static
     * @memberOf _
     * @alias include
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Mixed} target The value to check for.
     * @param {Number} [fromIndex=0] The index to search from.
     * @returns {Boolean} Returns `true` if the `target` element is found, else `false`.
     * @example
     *
     * _.contains([1, 2, 3], 1);
     * // => true
     *
     * _.contains([1, 2, 3], 1, 2);
     * // => false
     *
     * _.contains({ 'name': 'moe', 'age': 40 }, 'moe');
     * // => true
     *
     * _.contains('curly', 'ur');
     * // => true
     */
    function contains(collection, target, fromIndex) {
      var index = -1,
          indexOf = getIndexOf(),
          length = collection ? collection.length : 0,
          result = false;

      fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
      if (length && typeof length == 'number') {
        result = (isString(collection)
          ? collection.indexOf(target, fromIndex)
          : indexOf(collection, target, fromIndex)
        ) > -1;
      } else {
        forOwn(collection, function(value) {
          if (++index >= fromIndex) {
            return !(result = value === target);
          }
        });
      }
      return result;
    }

    /**
     * Creates an object composed of keys returned from running each element of the
     * `collection` through the given `callback`. The corresponding value of each key
     * is the number of times the key was returned by the `callback`. The `callback`
     * is bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    function countBy(collection, callback, thisArg) {
      var result = {};
      callback = lodash.createCallback(callback, thisArg);

      forEach(collection, function(value, key, collection) {
        key = String(callback(value, key, collection));
        (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
      });
      return result;
    }

    /**
     * Checks if the `callback` returns a truthy value for **all** elements of a
     * `collection`. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias all
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Boolean} Returns `true` if all elements pass the callback check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes'], Boolean);
     * // => false
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.every(stooges, 'age');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.every(stooges, { 'age': 50 });
     * // => false
     */
    function every(collection, callback, thisArg) {
      var result = true;
      callback = lodash.createCallback(callback, thisArg);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if (!(result = !!callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return (result = !!callback(value, index, collection));
        });
      }
      return result;
    }

    /**
     * Examines each element in a `collection`, returning an array of all elements
     * the `callback` returns truthy for. The `callback` is bound to `thisArg` and
     * invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias select
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that passed the callback check.
     * @example
     *
     * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [2, 4, 6]
     *
     * var food = [
     *   { 'name': 'apple',  'organic': false, 'type': 'fruit' },
     *   { 'name': 'carrot', 'organic': true,  'type': 'vegetable' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.filter(food, 'organic');
     * // => [{ 'name': 'carrot', 'organic': true, 'type': 'vegetable' }]
     *
     * // using "_.where" callback shorthand
     * _.filter(food, { 'type': 'fruit' });
     * // => [{ 'name': 'apple', 'organic': false, 'type': 'fruit' }]
     */
    function filter(collection, callback, thisArg) {
      var result = [];
      callback = lodash.createCallback(callback, thisArg);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            result.push(value);
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result.push(value);
          }
        });
      }
      return result;
    }

    /**
     * Examines each element in a `collection`, returning the first that the `callback`
     * returns truthy for. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias detect, findWhere
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the found element, else `undefined`.
     * @example
     *
     * _.find([1, 2, 3, 4], function(num) {
     *   return num % 2 == 0;
     * });
     * // => 2
     *
     * var food = [
     *   { 'name': 'apple',  'organic': false, 'type': 'fruit' },
     *   { 'name': 'banana', 'organic': true,  'type': 'fruit' },
     *   { 'name': 'beet',   'organic': false, 'type': 'vegetable' }
     * ];
     *
     * // using "_.where" callback shorthand
     * _.find(food, { 'type': 'vegetable' });
     * // => { 'name': 'beet', 'organic': false, 'type': 'vegetable' }
     *
     * // using "_.pluck" callback shorthand
     * _.find(food, 'organic');
     * // => { 'name': 'banana', 'organic': true, 'type': 'fruit' }
     */
    function find(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            return value;
          }
        }
      } else {
        var result;
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result = value;
            return false;
          }
        });
        return result;
      }
    }

    /**
     * Iterates over a `collection`, executing the `callback` for each element in
     * the `collection`. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection). Callbacks may exit iteration early
     * by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @alias each
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array|Object|String} Returns `collection`.
     * @example
     *
     * _([1, 2, 3]).forEach(alert).join(',');
     * // => alerts each number and returns '1,2,3'
     *
     * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, alert);
     * // => alerts each number value (order is not guaranteed)
     */
    function forEach(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = callback && typeof thisArg == 'undefined' ? callback : lodash.createCallback(callback, thisArg);
      if (typeof length == 'number') {
        while (++index < length) {
          if (callback(collection[index], index, collection) === false) {
            break;
          }
        }
      } else {
        forOwn(collection, callback);
      }
      return collection;
    }

    /**
     * Creates an object composed of keys returned from running each element of the
     * `collection` through the `callback`. The corresponding value of each key is
     * an array of elements passed to `callback` that returned the key. The `callback`
     * is bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * // using "_.pluck" callback shorthand
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    function groupBy(collection, callback, thisArg) {
      var result = {};
      callback = lodash.createCallback(callback, thisArg);

      forEach(collection, function(value, key, collection) {
        key = String(callback(value, key, collection));
        (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
      });
      return result;
    }

    /**
     * Invokes the method named by `methodName` on each element in the `collection`,
     * returning an array of the results of each invoked method. Additional arguments
     * will be passed to each invoked method. If `methodName` is a function, it will
     * be invoked for, and `this` bound to, each element in the `collection`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|String} methodName The name of the method to invoke or
     *  the function invoked per iteration.
     * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the method with.
     * @returns {Array} Returns a new array of the results of each invoked method.
     * @example
     *
     * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invoke([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    function invoke(collection, methodName) {
      var args = nativeSlice.call(arguments, 2),
          index = -1,
          isFunc = typeof methodName == 'function',
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
      });
      return result;
    }

    /**
     * Creates an array of values by running each element in the `collection`
     * through the `callback`. The `callback` is bound to `thisArg` and invoked with
     * three arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias collect
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of the results of each `callback` execution.
     * @example
     *
     * _.map([1, 2, 3], function(num) { return num * 3; });
     * // => [3, 6, 9]
     *
     * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
     * // => [3, 6, 9] (order is not guaranteed)
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.map(stooges, 'name');
     * // => ['moe', 'larry']
     */
    function map(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = lodash.createCallback(callback, thisArg);
      if (typeof length == 'number') {
        var result = Array(length);
        while (++index < length) {
          result[index] = callback(collection[index], index, collection);
        }
      } else {
        result = [];
        forOwn(collection, function(value, key, collection) {
          result[++index] = callback(value, key, collection);
        });
      }
      return result;
    }

    /**
     * Retrieves the maximum value of an `array`. If `callback` is passed,
     * it will be executed for each value in the `array` to generate the
     * criterion by which the value is ranked. The `callback` is bound to
     * `thisArg` and invoked with three arguments; (value, index, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * _.max(stooges, function(stooge) { return stooge.age; });
     * // => { 'name': 'larry', 'age': 50 };
     *
     * // using "_.pluck" callback shorthand
     * _.max(stooges, 'age');
     * // => { 'name': 'larry', 'age': 50 };
     */
    function max(collection, callback, thisArg) {
      var computed = -Infinity,
          result = computed;

      if (!callback && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value > result) {
            result = value;
          }
        }
      } else {
        callback = (!callback && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current > computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the minimum value of an `array`. If `callback` is passed,
     * it will be executed for each value in the `array` to generate the
     * criterion by which the value is ranked. The `callback` is bound to `thisArg`
     * and invoked with three arguments; (value, index, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * _.min(stooges, function(stooge) { return stooge.age; });
     * // => { 'name': 'moe', 'age': 40 };
     *
     * // using "_.pluck" callback shorthand
     * _.min(stooges, 'age');
     * // => { 'name': 'moe', 'age': 40 };
     */
    function min(collection, callback, thisArg) {
      var computed = Infinity,
          result = computed;

      if (!callback && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value < result) {
            result = value;
          }
        }
      } else {
        callback = (!callback && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current < computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the value of a specified property from all elements in the `collection`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {String} property The property to pluck.
     * @returns {Array} Returns a new array of property values.
     * @example
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * _.pluck(stooges, 'name');
     * // => ['moe', 'larry']
     */
    function pluck(collection, property) {
      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        var result = Array(length);
        while (++index < length) {
          result[index] = collection[index][property];
        }
      }
      return result || map(collection, property);
    }

    /**
     * Reduces a `collection` to a value which is the accumulated result of running
     * each element in the `collection` through the `callback`, where each successive
     * `callback` execution consumes the return value of the previous execution.
     * If `accumulator` is not passed, the first element of the `collection` will be
     * used as the initial `accumulator` value. The `callback` is bound to `thisArg`
     * and invoked with four arguments; (accumulator, value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @alias foldl, inject
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [accumulator] Initial value of the accumulator.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the accumulated value.
     * @example
     *
     * var sum = _.reduce([1, 2, 3], function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     *   return result;
     * }, {});
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function reduce(collection, callback, accumulator, thisArg) {
      if (!collection) return accumulator;
      var noaccum = arguments.length < 3;
      callback = lodash.createCallback(callback, thisArg, 4);

      var index = -1,
          length = collection.length;

      if (typeof length == 'number') {
        if (noaccum) {
          accumulator = collection[++index];
        }
        while (++index < length) {
          accumulator = callback(accumulator, collection[index], index, collection);
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          accumulator = noaccum
            ? (noaccum = false, value)
            : callback(accumulator, value, index, collection)
        });
      }
      return accumulator;
    }

    /**
     * This method is similar to `_.reduce`, except that it iterates over a
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias foldr
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {Mixed} [accumulator] Initial value of the accumulator.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the accumulated value.
     * @example
     *
     * var list = [[0, 1], [2, 3], [4, 5]];
     * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    function reduceRight(collection, callback, accumulator, thisArg) {
      var iterable = collection,
          length = collection ? collection.length : 0,
          noaccum = arguments.length < 3;

      if (typeof length != 'number') {
        var props = keys(collection);
        length = props.length;
      }
      callback = lodash.createCallback(callback, thisArg, 4);
      forEach(collection, function(value, index, collection) {
        index = props ? props[--length] : --length;
        accumulator = noaccum
          ? (noaccum = false, iterable[index])
          : callback(accumulator, iterable[index], index, collection);
      });
      return accumulator;
    }

    /**
     * The opposite of `_.filter`, this method returns the elements of a
     * `collection` that `callback` does **not** return truthy for.
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that did **not** pass the
     *  callback check.
     * @example
     *
     * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [1, 3, 5]
     *
     * var food = [
     *   { 'name': 'apple',  'organic': false, 'type': 'fruit' },
     *   { 'name': 'carrot', 'organic': true,  'type': 'vegetable' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.reject(food, 'organic');
     * // => [{ 'name': 'apple', 'organic': false, 'type': 'fruit' }]
     *
     * // using "_.where" callback shorthand
     * _.reject(food, { 'type': 'fruit' });
     * // => [{ 'name': 'carrot', 'organic': true, 'type': 'vegetable' }]
     */
    function reject(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg);
      return filter(collection, function(value, index, collection) {
        return !callback(value, index, collection);
      });
    }

    /**
     * Creates an array of shuffled `array` values, using a version of the
     * Fisher-Yates shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to shuffle.
     * @returns {Array} Returns a new shuffled collection.
     * @example
     *
     * _.shuffle([1, 2, 3, 4, 5, 6]);
     * // => [4, 1, 6, 3, 5, 2]
     */
    function shuffle(collection) {
      var index = -1,
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        var rand = floor(nativeRandom() * (++index + 1));
        result[index] = result[rand];
        result[rand] = value;
      });
      return result;
    }

    /**
     * Gets the size of the `collection` by returning `collection.length` for arrays
     * and array-like objects or the number of own enumerable properties for objects.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to inspect.
     * @returns {Number} Returns `collection.length` or number of own enumerable properties.
     * @example
     *
     * _.size([1, 2]);
     * // => 2
     *
     * _.size({ 'one': 1, 'two': 2, 'three': 3 });
     * // => 3
     *
     * _.size('curly');
     * // => 5
     */
    function size(collection) {
      var length = collection ? collection.length : 0;
      return typeof length == 'number' ? length : keys(collection).length;
    }

    /**
     * Checks if the `callback` returns a truthy value for **any** element of a
     * `collection`. The function returns as soon as it finds passing value, and
     * does not iterate over the entire `collection`. The `callback` is bound to
     * `thisArg` and invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias any
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Boolean} Returns `true` if any element passes the callback check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var food = [
     *   { 'name': 'apple',  'organic': false, 'type': 'fruit' },
     *   { 'name': 'carrot', 'organic': true,  'type': 'vegetable' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.some(food, 'organic');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.some(food, { 'type': 'meat' });
     * // => false
     */
    function some(collection, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if ((result = callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return !(result = callback(value, index, collection));
        });
      }
      return !!result;
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in the `collection` through the `callback`. This method
     * performs a stable sort, that is, it will preserve the original sort order of
     * equal elements. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of sorted elements.
     * @example
     *
     * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
     * // => [3, 1, 2]
     *
     * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
     * // => [3, 1, 2]
     *
     * // using "_.pluck" callback shorthand
     * _.sortBy(['banana', 'strawberry', 'apple'], 'length');
     * // => ['apple', 'banana', 'strawberry']
     */
    function sortBy(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      callback = lodash.createCallback(callback, thisArg);
      forEach(collection, function(value, key, collection) {
        var object = result[++index] = getObject();
        object.criteria = callback(value, key, collection);
        object.index = index;
        object.value = value;
      });

      length = result.length;
      result.sort(compareAscending);
      while (length--) {
        var object = result[length];
        result[length] = object.value;
        releaseObject(object);
      }
      return result;
    }

    /**
     * Converts the `collection` to an array.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|String} collection The collection to convert.
     * @returns {Array} Returns the new converted array.
     * @example
     *
     * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
     * // => [2, 3, 4]
     */
    function toArray(collection) {
      if (collection && typeof collection.length == 'number') {
        return slice(collection);
      }
      return values(collection);
    }

    /**
     * Examines each element in a `collection`, returning an array of all elements
     * that have the given `properties`. When checking `properties`, this method
     * performs a deep comparison between values to determine if they are equivalent
     * to each other.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|String} collection The collection to iterate over.
     * @param {Object} properties The object of property values to filter by.
     * @returns {Array} Returns a new array of elements that have the given `properties`.
     * @example
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * _.where(stooges, { 'age': 40 });
     * // => [{ 'name': 'moe', 'age': 40 }]
     */
    var where = filter;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array with all falsey values of `array` removed. The values
     * `false`, `null`, `0`, `""`, `undefined` and `NaN` are all falsey.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to compact.
     * @returns {Array} Returns a new filtered array.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * Creates an array of `array` elements not present in the other arrays
     * using strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {Array} [array1, array2, ...] Arrays to check.
     * @returns {Array} Returns a new array of `array` elements not present in the
     *  other arrays.
     * @example
     *
     * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
     * // => [1, 3, 4]
     */
    function difference(array) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          seen = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
          result = [];

      var isLarge = length >= largeArraySize && indexOf === basicIndexOf;

      if (isLarge) {
        var cache = createCache(seen);
        if (cache) {
          indexOf = cacheIndexOf;
          seen = cache;
        } else {
          isLarge = false;
        }
      }
      while (++index < length) {
        var value = array[index];
        if (indexOf(seen, value) < 0) {
          result.push(value);
        }
      }
      if (isLarge) {
        releaseObject(seen);
      }
      return result;
    }

    /**
     * This method is similar to `_.find`, except that it returns the index of
     * the element that passes the callback check, instead of the element itself.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the index of the found element, else `-1`.
     * @example
     *
     * _.findIndex(['apple', 'banana', 'beet'], function(food) {
     *   return /^b/.test(food);
     * });
     * // => 1
     */
    function findIndex(array, callback, thisArg) {
      var index = -1,
          length = array ? array.length : 0;

      callback = lodash.createCallback(callback, thisArg);
      while (++index < length) {
        if (callback(array[index], index, array)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * Gets the first element of the `array`. If a number `n` is passed, the first
     * `n` elements of the `array` are returned. If a `callback` function is passed,
     * elements at the beginning of the array are returned as long as the `callback`
     * returns truthy. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias head, take
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|Number|String} [callback|n] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is passed, it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the first element(s) of `array`.
     * @example
     *
     * _.first([1, 2, 3]);
     * // => 1
     *
     * _.first([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.first([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [1, 2]
     *
     * var food = [
     *   { 'name': 'banana', 'organic': true },
     *   { 'name': 'beet',   'organic': false },
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.first(food, 'organic');
     * // => [{ 'name': 'banana', 'organic': true }]
     *
     * var food = [
     *   { 'name': 'apple',  'type': 'fruit' },
     *   { 'name': 'banana', 'type': 'fruit' },
     *   { 'name': 'beet',   'type': 'vegetable' }
     * ];
     *
     * // using "_.where" callback shorthand
     * _.first(food, { 'type': 'fruit' });
     * // => [{ 'name': 'apple', 'type': 'fruit' }, { 'name': 'banana', 'type': 'fruit' }]
     */
    function first(array, callback, thisArg) {
      if (array) {
        var n = 0,
            length = array.length;

        if (typeof callback != 'number' && callback != null) {
          var index = -1;
          callback = lodash.createCallback(callback, thisArg);
          while (++index < length && callback(array[index], index, array)) {
            n++;
          }
        } else {
          n = callback;
          if (n == null || thisArg) {
            return array[0];
          }
        }
        return slice(array, 0, nativeMin(nativeMax(0, n), length));
      }
    }

    /**
     * Flattens a nested array (the nesting can be to any depth). If `isShallow`
     * is truthy, `array` will only be flattened a single level. If `callback`
     * is passed, each element of `array` is passed through a `callback` before
     * flattening. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to flatten.
     * @param {Boolean} [isShallow=false] A flag to indicate only flattening a single level.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new flattened array.
     * @example
     *
     * _.flatten([1, [2], [3, [[4]]]]);
     * // => [1, 2, 3, 4];
     *
     * _.flatten([1, [2], [3, [[4]]]], true);
     * // => [1, 2, 3, [[4]]];
     *
     * var stooges = [
     *   { 'name': 'curly', 'quotes': ['Oh, a wise guy, eh?', 'Poifect!'] },
     *   { 'name': 'moe', 'quotes': ['Spread out!', 'You knucklehead!'] }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.flatten(stooges, 'quotes');
     * // => ['Oh, a wise guy, eh?', 'Poifect!', 'Spread out!', 'You knucklehead!']
     */
    var flatten = overloadWrapper(function flatten(array, isShallow, callback) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (callback) {
          value = callback(value, index, array);
        }
        // recursively flatten arrays (susceptible to call stack limits)
        if (isArray(value)) {
          push.apply(result, isShallow ? value : flatten(value));
        } else {
          result.push(value);
        }
      }
      return result;
    });

    /**
     * Gets the index at which the first occurrence of `value` is found using
     * strict equality for comparisons, i.e. `===`. If the `array` is already
     * sorted, passing `true` for `fromIndex` will run a faster binary search.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Mixed} value The value to search for.
     * @param {Boolean|Number} [fromIndex=0] The index to search from or `true` to
     *  perform a binary search on a sorted `array`.
     * @returns {Number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 1
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 4
     *
     * _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
     * // => 2
     */
    function indexOf(array, value, fromIndex) {
      if (typeof fromIndex == 'number') {
        var length = array ? array.length : 0;
        fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0);
      } else if (fromIndex) {
        var index = sortedIndex(array, value);
        return array[index] === value ? index : -1;
      }
      return array ? basicIndexOf(array, value, fromIndex) : -1;
    }

    /**
     * Gets all but the last element of `array`. If a number `n` is passed, the
     * last `n` elements are excluded from the result. If a `callback` function
     * is passed, elements at the end of the array are excluded from the result
     * as long as the `callback` returns truthy. The `callback` is bound to
     * `thisArg` and invoked with three arguments; (value, index, array).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|Number|String} [callback|n=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is passed, it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     *
     * _.initial([1, 2, 3], 2);
     * // => [1]
     *
     * _.initial([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [1]
     *
     * var food = [
     *   { 'name': 'beet',   'organic': false },
     *   { 'name': 'carrot', 'organic': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.initial(food, 'organic');
     * // => [{ 'name': 'beet',   'organic': false }]
     *
     * var food = [
     *   { 'name': 'banana', 'type': 'fruit' },
     *   { 'name': 'beet',   'type': 'vegetable' },
     *   { 'name': 'carrot', 'type': 'vegetable' }
     * ];
     *
     * // using "_.where" callback shorthand
     * _.initial(food, { 'type': 'vegetable' });
     * // => [{ 'name': 'banana', 'type': 'fruit' }]
     */
    function initial(array, callback, thisArg) {
      if (!array) {
        return [];
      }
      var n = 0,
          length = array.length;

      if (typeof callback != 'number' && callback != null) {
        var index = length;
        callback = lodash.createCallback(callback, thisArg);
        while (index-- && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : callback || n;
      }
      return slice(array, 0, nativeMin(nativeMax(0, length - n), length));
    }

    /**
     * Computes the intersection of all the passed-in arrays using strict equality
     * for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} [array1, array2, ...] Arrays to process.
     * @returns {Array} Returns a new array of unique elements that are present
     *  in **all** of the arrays.
     * @example
     *
     * _.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]);
     * // => [1, 2]
     */
    function intersection(array) {
      var args = arguments,
          argsLength = args.length,
          argsIndex = -1,
          caches = getArray(),
          index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          result = [],
          seen = getArray();

      while (++argsIndex < argsLength) {
        var value = args[argsIndex];
        caches[argsIndex] = indexOf === basicIndexOf &&
          (value ? value.length : 0) >= largeArraySize &&
          createCache(argsIndex ? args[argsIndex] : seen);
      }
      outer:
      while (++index < length) {
        var cache = caches[0];
        value = array[index];

        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
          argsIndex = argsLength;
          (cache || seen).push(value);
          while (--argsIndex) {
            cache = caches[argsIndex];
            if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
              continue outer;
            }
          }
          result.push(value);
        }
      }
      while (argsLength--) {
        cache = caches[argsLength];
        if (cache) {
          releaseObject(cache);
        }
      }
      releaseArray(caches);
      releaseArray(seen);
      return result;
    }

    /**
     * Gets the last element of the `array`. If a number `n` is passed, the
     * last `n` elements of the `array` are returned. If a `callback` function
     * is passed, elements at the end of the array are returned as long as the
     * `callback` returns truthy. The `callback` is bound to `thisArg` and
     * invoked with three arguments;(value, index, array).
     *
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|Number|String} [callback|n] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is passed, it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Mixed} Returns the last element(s) of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     *
     * _.last([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.last([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [2, 3]
     *
     * var food = [
     *   { 'name': 'beet',   'organic': false },
     *   { 'name': 'carrot', 'organic': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.last(food, 'organic');
     * // => [{ 'name': 'carrot', 'organic': true }]
     *
     * var food = [
     *   { 'name': 'banana', 'type': 'fruit' },
     *   { 'name': 'beet',   'type': 'vegetable' },
     *   { 'name': 'carrot', 'type': 'vegetable' }
     * ];
     *
     * // using "_.where" callback shorthand
     * _.last(food, { 'type': 'vegetable' });
     * // => [{ 'name': 'beet', 'type': 'vegetable' }, { 'name': 'carrot', 'type': 'vegetable' }]
     */
    function last(array, callback, thisArg) {
      if (array) {
        var n = 0,
            length = array.length;

        if (typeof callback != 'number' && callback != null) {
          var index = length;
          callback = lodash.createCallback(callback, thisArg);
          while (index-- && callback(array[index], index, array)) {
            n++;
          }
        } else {
          n = callback;
          if (n == null || thisArg) {
            return array[length - 1];
          }
        }
        return slice(array, nativeMax(0, length - n));
      }
    }

    /**
     * Gets the index at which the last occurrence of `value` is found using strict
     * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
     * as the offset from the end of the collection.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Mixed} value The value to search for.
     * @param {Number} [fromIndex=array.length-1] The index to search from.
     * @returns {Number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 4
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 1
     */
    function lastIndexOf(array, value, fromIndex) {
      var index = array ? array.length : 0;
      if (typeof fromIndex == 'number') {
        index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
      }
      while (index--) {
        if (array[index] === value) {
          return index;
        }
      }
      return -1;
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to but not including `end`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Number} [start=0] The start of the range.
     * @param {Number} end The end of the range.
     * @param {Number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns a new range array.
     * @example
     *
     * _.range(10);
     * // => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
     *
     * _.range(1, 11);
     * // => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
     *
     * _.range(0, 30, 5);
     * // => [0, 5, 10, 15, 20, 25]
     *
     * _.range(0, -10, -1);
     * // => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
     *
     * _.range(0);
     * // => []
     */
    function range(start, end, step) {
      start = +start || 0;
      step = +step || 1;

      if (end == null) {
        end = start;
        start = 0;
      }
      // use `Array(length)` so V8 will avoid the slower "dictionary" mode
      // http://youtu.be/XAqIpGU8ZZk#t=17m25s
      var index = -1,
          length = nativeMax(0, ceil((end - start) / step)),
          result = Array(length);

      while (++index < length) {
        result[index] = start;
        start += step;
      }
      return result;
    }

    /**
     * The opposite of `_.initial`, this method gets all but the first value of
     * `array`. If a number `n` is passed, the first `n` values are excluded from
     * the result. If a `callback` function is passed, elements at the beginning
     * of the array are excluded from the result as long as the `callback` returns
     * truthy. The `callback` is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias drop, tail
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|Number|String} [callback|n=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is passed, it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.rest([1, 2, 3]);
     * // => [2, 3]
     *
     * _.rest([1, 2, 3], 2);
     * // => [3]
     *
     * _.rest([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [3]
     *
     * var food = [
     *   { 'name': 'banana', 'organic': true },
     *   { 'name': 'beet',   'organic': false },
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.rest(food, 'organic');
     * // => [{ 'name': 'beet', 'organic': false }]
     *
     * var food = [
     *   { 'name': 'apple',  'type': 'fruit' },
     *   { 'name': 'banana', 'type': 'fruit' },
     *   { 'name': 'beet',   'type': 'vegetable' }
     * ];
     *
     * // using "_.where" callback shorthand
     * _.rest(food, { 'type': 'fruit' });
     * // => [{ 'name': 'beet', 'type': 'vegetable' }]
     */
    function rest(array, callback, thisArg) {
      if (typeof callback != 'number' && callback != null) {
        var n = 0,
            index = -1,
            length = array ? array.length : 0;

        callback = lodash.createCallback(callback, thisArg);
        while (++index < length && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
      }
      return slice(array, n);
    }

    /**
     * Uses a binary search to determine the smallest index at which the `value`
     * should be inserted into `array` in order to maintain the sort order of the
     * sorted `array`. If `callback` is passed, it will be executed for `value` and
     * each element in `array` to compute their sort ranking. The `callback` is
     * bound to `thisArg` and invoked with one argument; (value).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to inspect.
     * @param {Mixed} value The value to evaluate.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Number} Returns the index at which the value should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([20, 30, 50], 40);
     * // => 2
     *
     * // using "_.pluck" callback shorthand
     * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
     * // => 2
     *
     * var dict = {
     *   'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
     * };
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return dict.wordToNumber[word];
     * });
     * // => 2
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return this.wordToNumber[word];
     * }, dict);
     * // => 2
     */
    function sortedIndex(array, value, callback, thisArg) {
      var low = 0,
          high = array ? array.length : low;

      // explicitly reference `identity` for better inlining in Firefox
      callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity;
      value = callback(value);

      while (low < high) {
        var mid = (low + high) >>> 1;
        (callback(array[mid]) < value)
          ? low = mid + 1
          : high = mid;
      }
      return low;
    }

    /**
     * Computes the union of the passed-in arrays using strict equality for
     * comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} [array1, array2, ...] Arrays to process.
     * @returns {Array} Returns a new array of unique values, in order, that are
     *  present in one or more of the arrays.
     * @example
     *
     * _.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);
     * // => [1, 2, 3, 101, 10]
     */
    function union(array) {
      if (!isArray(array)) {
        arguments[0] = array ? nativeSlice.call(array) : arrayRef;
      }
      return uniq(concat.apply(arrayRef, arguments));
    }

    /**
     * Creates a duplicate-value-free version of the `array` using strict equality
     * for comparisons, i.e. `===`. If the `array` is already sorted, passing `true`
     * for `isSorted` will run a faster algorithm. If `callback` is passed, each
     * element of `array` is passed through the `callback` before uniqueness is computed.
     * The `callback` is bound to `thisArg` and invoked with three arguments; (value, index, array).
     *
     * If a property name is passed for `callback`, the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is passed for `callback`, the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias unique
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {Boolean} [isSorted=false] A flag to indicate that the `array` is already sorted.
     * @param {Function|Object|String} [callback=identity] The function called per
     *  iteration. If a property name or object is passed, it will be used to create
     *  a "_.pluck" or "_.where" style callback, respectively.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a duplicate-value-free array.
     * @example
     *
     * _.uniq([1, 2, 1, 3, 1]);
     * // => [1, 2, 3]
     *
     * _.uniq([1, 1, 2, 2, 3], true);
     * // => [1, 2, 3]
     *
     * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); });
     * // => ['A', 'b', 'C']
     *
     * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math);
     * // => [1, 2.5, 3]
     *
     * // using "_.pluck" callback shorthand
     * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    var uniq = overloadWrapper(function(array, isSorted, callback) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          result = [];

      var isLarge = !isSorted && length >= largeArraySize && indexOf === basicIndexOf,
          seen = (callback || isLarge) ? getArray() : result;

      if (isLarge) {
        var cache = createCache(seen);
        if (cache) {
          indexOf = cacheIndexOf;
          seen = cache;
        } else {
          isLarge = false;
          seen = callback ? seen : (releaseArray(seen), result);
        }
      }
      while (++index < length) {
        var value = array[index],
            computed = callback ? callback(value, index, array) : value;

        if (isSorted
              ? !index || seen[seen.length - 1] !== computed
              : indexOf(seen, computed) < 0
            ) {
          if (callback || isLarge) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      if (isLarge) {
        releaseArray(seen.array);
        releaseObject(seen);
      } else if (callback) {
        releaseArray(seen);
      }
      return result;
    });

    /**
     * The inverse of `_.zip`, this method splits groups of elements into arrays
     * composed of elements from each group at their corresponding indexes.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to process.
     * @returns {Array} Returns a new array of the composed arrays.
     * @example
     *
     * _.unzip([['moe', 30, true], ['larry', 40, false]]);
     * // => [['moe', 'larry'], [30, 40], [true, false]];
     */
    function unzip(array) {
      var index = -1,
          length = array ? max(pluck(array, 'length')) : 0,
          result = Array(length < 0 ? 0 : length);

      while (++index < length) {
        result[index] = pluck(array, index);
      }
      return result;
    }

    /**
     * Creates an array with all occurrences of the passed values removed using
     * strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to filter.
     * @param {Mixed} [value1, value2, ...] Values to remove.
     * @returns {Array} Returns a new filtered array.
     * @example
     *
     * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
     * // => [2, 3, 4]
     */
    function without(array) {
      return difference(array, nativeSlice.call(arguments, 1));
    }

    /**
     * Groups the elements of each array at their corresponding indexes. Useful for
     * separate data sources that are coordinated through matching array indexes.
     * For a matrix of nested arrays, `_.zip.apply(...)` can transpose the matrix
     * in a similar fashion.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} [array1, array2, ...] Arrays to process.
     * @returns {Array} Returns a new array of grouped elements.
     * @example
     *
     * _.zip(['moe', 'larry'], [30, 40], [true, false]);
     * // => [['moe', 30, true], ['larry', 40, false]]
     */
    function zip(array) {
      return array ? unzip(arguments) : [];
    }

    /**
     * Creates an object composed from arrays of `keys` and `values`. Pass either
     * a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`, or
     * two arrays, one of `keys` and one of corresponding `values`.
     *
     * @static
     * @memberOf _
     * @alias object
     * @category Arrays
     * @param {Array} keys The array of keys.
     * @param {Array} [values=[]] The array of values.
     * @returns {Object} Returns an object composed of the given keys and
     *  corresponding values.
     * @example
     *
     * _.zipObject(['moe', 'larry'], [30, 40]);
     * // => { 'moe': 30, 'larry': 40 }
     */
    function zipObject(keys, values) {
      var index = -1,
          length = keys ? keys.length : 0,
          result = {};

      while (++index < length) {
        var key = keys[index];
        if (values) {
          result[key] = values[index];
        } else {
          result[key[0]] = key[1];
        }
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * If `n` is greater than `0`, a function is created that is restricted to
     * executing `func`, with the `this` binding and arguments of the created
     * function, only after it is called `n` times. If `n` is less than `1`,
     * `func` is executed immediately, without a `this` binding or additional
     * arguments, and its result is returned.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Number} n The number of times the function must be called before
     * it is executed.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var renderNotes = _.after(notes.length, render);
     * _.forEach(notes, function(note) {
     *   note.asyncSave({ 'success': renderNotes });
     * });
     * // `renderNotes` is run once, after all notes have saved
     */
    function after(n, func) {
      if (n < 1) {
        return func();
      }
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with the `this`
     * binding of `thisArg` and prepends any additional `bind` arguments to those
     * passed to the bound function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to bind.
     * @param {Mixed} [thisArg] The `this` binding of `func`.
     * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var func = function(greeting) {
     *   return greeting + ' ' + this.name;
     * };
     *
     * func = _.bind(func, { 'name': 'moe' }, 'hi');
     * func();
     * // => 'hi moe'
     */
    function bind(func, thisArg) {
      // use `Function#bind` if it exists and is fast
      // (in V8 `Function#bind` is slower except when partially applied)
      return support.fastBind || (nativeBind && arguments.length > 2)
        ? nativeBind.call.apply(nativeBind, arguments)
        : createBound(func, thisArg, nativeSlice.call(arguments, 2));
    }

    /**
     * Binds methods on `object` to `object`, overwriting the existing method.
     * Method names may be specified as individual arguments or as arrays of method
     * names. If no method names are provided, all the function properties of `object`
     * will be bound.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *  'label': 'docs',
     *  'onClick': function() { alert('clicked ' + this.label); }
     * };
     *
     * _.bindAll(view);
     * jQuery('#docs').on('click', view.onClick);
     * // => alerts 'clicked docs', when the button is clicked
     */
    function bindAll(object) {
      var funcs = arguments.length > 1 ? concat.apply(arrayRef, nativeSlice.call(arguments, 1)) : functions(object),
          index = -1,
          length = funcs.length;

      while (++index < length) {
        var key = funcs[index];
        object[key] = bind(object[key], object);
      }
      return object;
    }

    /**
     * Creates a function that, when called, invokes the method at `object[key]`
     * and prepends any additional `bindKey` arguments to those passed to the bound
     * function. This method differs from `_.bind` by allowing bound functions to
     * reference methods that will be redefined or don't yet exist.
     * See http://michaux.ca/articles/lazy-function-definition-pattern.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object the method belongs to.
     * @param {String} key The key of the method.
     * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'name': 'moe',
     *   'greet': function(greeting) {
     *     return greeting + ' ' + this.name;
     *   }
     * };
     *
     * var func = _.bindKey(object, 'greet', 'hi');
     * func();
     * // => 'hi moe'
     *
     * object.greet = function(greeting) {
     *   return greeting + ', ' + this.name + '!';
     * };
     *
     * func();
     * // => 'hi, moe!'
     */
    function bindKey(object, key) {
      return createBound(object, key, nativeSlice.call(arguments, 2), indicatorObject);
    }

    /**
     * Creates a function that is the composition of the passed functions,
     * where each function consumes the return value of the function that follows.
     * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
     * Each function is executed with the `this` binding of the composed function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} [func1, func2, ...] Functions to compose.
     * @returns {Function} Returns the new composed function.
     * @example
     *
     * var greet = function(name) { return 'hi ' + name; };
     * var exclaim = function(statement) { return statement + '!'; };
     * var welcome = _.compose(exclaim, greet);
     * welcome('moe');
     * // => 'hi moe!'
     */
    function compose() {
      var funcs = arguments;
      return function() {
        var args = arguments,
            length = funcs.length;

        while (length--) {
          args = [funcs[length].apply(this, args)];
        }
        return args[0];
      };
    }

    /**
     * Produces a callback bound to an optional `thisArg`. If `func` is a property
     * name, the created callback will return the property value for a given element.
     * If `func` is an object, the created callback will return `true` for elements
     * that contain the equivalent object properties, otherwise it will return `false`.
     *
     * Note: All Lo-Dash methods, that accept a `callback` argument, use `_.createCallback`.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Mixed} [func=identity] The value to convert to a callback.
     * @param {Mixed} [thisArg] The `this` binding of the created callback.
     * @param {Number} [argCount=3] The number of arguments the callback accepts.
     * @returns {Function} Returns a callback function.
     * @example
     *
     * var stooges = [
     *   { 'name': 'moe', 'age': 40 },
     *   { 'name': 'larry', 'age': 50 }
     * ];
     *
     * // wrap to create custom callback shorthands
     * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
     *   var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
     *   return !match ? func(callback, thisArg) : function(object) {
     *     return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
     *   };
     * });
     *
     * _.filter(stooges, 'age__gt45');
     * // => [{ 'name': 'larry', 'age': 50 }]
     *
     * // create mixins with support for "_.pluck" and "_.where" callback shorthands
     * _.mixin({
     *   'toLookup': function(collection, callback, thisArg) {
     *     callback = _.createCallback(callback, thisArg);
     *     return _.reduce(collection, function(result, value, index, collection) {
     *       return (result[callback(value, index, collection)] = value, result);
     *     }, {});
     *   }
     * });
     *
     * _.toLookup(stooges, 'name');
     * // => { 'moe': { 'name': 'moe', 'age': 40 }, 'larry': { 'name': 'larry', 'age': 50 } }
     */
    function createCallback(func, thisArg, argCount) {
      if (func == null) {
        return identity;
      }
      var type = typeof func;
      if (type != 'function') {
        if (type != 'object') {
          return function(object) {
            return object[func];
          };
        }
        var props = keys(func);
        return function(object) {
          var length = props.length,
              result = false;
          while (length--) {
            if (!(result = isEqual(object[props[length]], func[props[length]], indicatorObject))) {
              break;
            }
          }
          return result;
        };
      }
      if (typeof thisArg == 'undefined' || (reThis && !reThis.test(fnToString.call(func)))) {
        return func;
      }
      if (argCount === 1) {
        return function(value) {
          return func.call(thisArg, value);
        };
      }
      if (argCount === 2) {
        return function(a, b) {
          return func.call(thisArg, a, b);
        };
      }
      if (argCount === 4) {
        return function(accumulator, value, index, collection) {
          return func.call(thisArg, accumulator, value, index, collection);
        };
      }
      return function(value, index, collection) {
        return func.call(thisArg, value, index, collection);
      };
    }

    /**
     * Creates a function that will delay the execution of `func` until after
     * `wait` milliseconds have elapsed since the last time it was invoked. Pass
     * an `options` object to indicate that `func` should be invoked on the leading
     * and/or trailing edge of the `wait` timeout. Subsequent calls to the debounced
     * function will return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true`, `func` will be called
     * on the trailing edge of the timeout only if the the debounced function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to debounce.
     * @param {Number} wait The number of milliseconds to delay.
     * @param {Object} options The options object.
     *  [leading=false] A boolean to specify execution on the leading edge of the timeout.
     *  [maxWait] The maximum time `func` is allowed to be delayed before it's called.
     *  [trailing=true] A boolean to specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * var lazyLayout = _.debounce(calculateLayout, 300);
     * jQuery(window).on('resize', lazyLayout);
     *
     * jQuery('#postbox').on('click', _.debounce(sendMail, 200, {
     *   'leading': true,
     *   'trailing': false
     * });
     */
    function debounce(func, wait, options) {
      var args,
          result,
          thisArg,
          callCount = 0,
          lastCalled = 0,
          maxWait = false,
          maxTimeoutId = null,
          timeoutId = null,
          trailing = true;

      function clear() {
        clearTimeout(maxTimeoutId);
        clearTimeout(timeoutId);
        callCount = 0;
        maxTimeoutId = timeoutId = null;
      }

      function delayed() {
        var isCalled = trailing && (!leading || callCount > 1);
        clear();
        if (isCalled) {
          if (maxWait !== false) {
            lastCalled = new Date;
          }
          result = func.apply(thisArg, args);
        }
      }

      function maxDelayed() {
        clear();
        if (trailing || (maxWait !== wait)) {
          lastCalled = new Date;
          result = func.apply(thisArg, args);
        }
      }

      wait = nativeMax(0, wait || 0);
      if (options === true) {
        var leading = true;
        trailing = false;
      } else if (isObject(options)) {
        leading = options.leading;
        maxWait = 'maxWait' in options && nativeMax(wait, options.maxWait || 0);
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      return function() {
        args = arguments;
        thisArg = this;
        callCount++;

        // avoid issues with Titanium and `undefined` timeout ids
        // https://github.com/appcelerator/titanium_mobile/blob/3_1_0_GA/android/titanium/src/java/ti/modules/titanium/TitaniumModule.java#L185-L192
        clearTimeout(timeoutId);

        if (maxWait === false) {
          if (leading && callCount < 2) {
            result = func.apply(thisArg, args);
          }
        } else {
          var now = new Date;
          if (!maxTimeoutId && !leading) {
            lastCalled = now;
          }
          var remaining = maxWait - (now - lastCalled);
          if (remaining <= 0) {
            clearTimeout(maxTimeoutId);
            maxTimeoutId = null;
            lastCalled = now;
            result = func.apply(thisArg, args);
          }
          else if (!maxTimeoutId) {
            maxTimeoutId = setTimeout(maxDelayed, remaining);
          }
        }
        if (wait !== maxWait) {
          timeoutId = setTimeout(delayed, wait);
        }
        return result;
      };
    }

    /**
     * Defers executing the `func` function until the current call stack has cleared.
     * Additional arguments will be passed to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to defer.
     * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
     * @returns {Number} Returns the timer id.
     * @example
     *
     * _.defer(function() { alert('deferred'); });
     * // returns from the function before `alert` is called
     */
    function defer(func) {
      var args = nativeSlice.call(arguments, 1);
      return setTimeout(function() { func.apply(undefined, args); }, 1);
    }
    // use `setImmediate` if it's available in Node.js
    if (isV8 && freeModule && typeof setImmediate == 'function') {
      defer = bind(setImmediate, context);
    }

    /**
     * Executes the `func` function after `wait` milliseconds. Additional arguments
     * will be passed to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to delay.
     * @param {Number} wait The number of milliseconds to delay execution.
     * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
     * @returns {Number} Returns the timer id.
     * @example
     *
     * var log = _.bind(console.log, console);
     * _.delay(log, 1000, 'logged later');
     * // => 'logged later' (Appears after one second.)
     */
    function delay(func, wait) {
      var args = nativeSlice.call(arguments, 2);
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * passed, it will be used to determine the cache key for storing the result
     * based on the arguments passed to the memoized function. By default, the first
     * argument passed to the memoized function is used as the cache key. The `func`
     * is executed with the `this` binding of the memoized function. The result
     * cache is exposed as the `cache` property on the memoized function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] A function used to resolve the cache key.
     * @returns {Function} Returns the new memoizing function.
     * @example
     *
     * var fibonacci = _.memoize(function(n) {
     *   return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
     * });
     */
    function memoize(func, resolver) {
      function memoized() {
        var cache = memoized.cache,
            key = keyPrefix + (resolver ? resolver.apply(this, arguments) : arguments[0]);

        return hasOwnProperty.call(cache, key)
          ? cache[key]
          : (cache[key] = func.apply(this, arguments));
      }
      memoized.cache = {};
      return memoized;
    }

    /**
     * Creates a function that is restricted to execute `func` once. Repeat calls to
     * the function will return the value of the first call. The `func` is executed
     * with the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // `initialize` executes `createApplication` once
     */
    function once(func) {
      var ran,
          result;

      return function() {
        if (ran) {
          return result;
        }
        ran = true;
        result = func.apply(this, arguments);

        // clear the `func` variable so the function may be garbage collected
        func = null;
        return result;
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with any additional
     * `partial` arguments prepended to those passed to the new function. This
     * method is similar to `_.bind`, except it does **not** alter the `this` binding.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var greet = function(greeting, name) { return greeting + ' ' + name; };
     * var hi = _.partial(greet, 'hi');
     * hi('moe');
     * // => 'hi moe'
     */
    function partial(func) {
      return createBound(func, nativeSlice.call(arguments, 1));
    }

    /**
     * This method is similar to `_.partial`, except that `partial` arguments are
     * appended to those passed to the new function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var defaultsDeep = _.partialRight(_.merge, _.defaults);
     *
     * var options = {
     *   'variable': 'data',
     *   'imports': { 'jq': $ }
     * };
     *
     * defaultsDeep(options, _.templateSettings);
     *
     * options.variable
     * // => 'data'
     *
     * options.imports
     * // => { '_': _, 'jq': $ }
     */
    function partialRight(func) {
      return createBound(func, nativeSlice.call(arguments, 1), null, indicatorObject);
    }

    /**
     * Creates a function that, when executed, will only call the `func` function
     * at most once per every `wait` milliseconds. Pass an `options` object to
     * indicate that `func` should be invoked on the leading and/or trailing edge
     * of the `wait` timeout. Subsequent calls to the throttled function will
     * return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true`, `func` will be called
     * on the trailing edge of the timeout only if the the throttled function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to throttle.
     * @param {Number} wait The number of milliseconds to throttle executions to.
     * @param {Object} options The options object.
     *  [leading=true] A boolean to specify execution on the leading edge of the timeout.
     *  [trailing=true] A boolean to specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * var throttled = _.throttle(updatePosition, 100);
     * jQuery(window).on('scroll', throttled);
     *
     * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
     *   'trailing': false
     * }));
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (options === false) {
        leading = false;
      } else if (isObject(options)) {
        leading = 'leading' in options ? options.leading : leading;
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      options = getObject();
      options.leading = leading;
      options.maxWait = wait;
      options.trailing = trailing;

      var result = debounce(func, wait, options);
      releaseObject(options);
      return result;
    }

    /**
     * Creates a function that passes `value` to the `wrapper` function as its
     * first argument. Additional arguments passed to the function are appended
     * to those passed to the `wrapper` function. The `wrapper` is executed with
     * the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Mixed} value The value to wrap.
     * @param {Function} wrapper The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var hello = function(name) { return 'hello ' + name; };
     * hello = _.wrap(hello, function(func) {
     *   return 'before, ' + func('moe') + ', after';
     * });
     * hello();
     * // => 'before, hello moe, after'
     */
    function wrap(value, wrapper) {
      return function() {
        var args = [value];
        push.apply(args, arguments);
        return wrapper.apply(this, args);
      };
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
     * corresponding HTML entities.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {String} string The string to escape.
     * @returns {String} Returns the escaped string.
     * @example
     *
     * _.escape('Moe, Larry & Curly');
     * // => 'Moe, Larry &amp; Curly'
     */
    function escape(string) {
      return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar);
    }

    /**
     * This method returns the first argument passed to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Mixed} value Any value.
     * @returns {Mixed} Returns `value`.
     * @example
     *
     * var moe = { 'name': 'moe' };
     * moe === _.identity(moe);
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Adds functions properties of `object` to the `lodash` function and chainable
     * wrapper.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Object} object The object of function properties to add to `lodash`.
     * @example
     *
     * _.mixin({
     *   'capitalize': function(string) {
     *     return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
     *   }
     * });
     *
     * _.capitalize('moe');
     * // => 'Moe'
     *
     * _('moe').capitalize();
     * // => 'Moe'
     */
    function mixin(object) {
      forEach(functions(object), function(methodName) {
        var func = lodash[methodName] = object[methodName];

        lodash.prototype[methodName] = function() {
          var value = this.__wrapped__,
              args = [value];

          push.apply(args, arguments);
          var result = func.apply(lodash, args);
          return (value && typeof value == 'object' && value === result)
            ? this
            : new lodashWrapper(result);
        };
      });
    }

    /**
     * Reverts the '_' variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      context._ = oldDash;
      return this;
    }

    /**
     * Converts the given `value` into an integer of the specified `radix`.
     * If `radix` is `undefined` or `0`, a `radix` of `10` is used unless the
     * `value` is a hexadecimal, in which case a `radix` of `16` is used.
     *
     * Note: This method avoids differences in native ES3 and ES5 `parseInt`
     * implementations. See http://es5.github.com/#E.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {String} value The value to parse.
     * @param {Number} [radix] The radix used to interpret the value to parse.
     * @returns {Number} Returns the new integer value.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     */
    var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) {
      // Firefox and Opera still follow the ES3 specified implementation of `parseInt`
      return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0);
    };

    /**
     * Produces a random number between `min` and `max` (inclusive). If only one
     * argument is passed, a number between `0` and the given number will be returned.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Number} [min=0] The minimum possible value.
     * @param {Number} [max=1] The maximum possible value.
     * @returns {Number} Returns a random number.
     * @example
     *
     * _.random(0, 5);
     * // => a number between 0 and 5
     *
     * _.random(5);
     * // => also a number between 0 and 5
     */
    function random(min, max) {
      if (min == null && max == null) {
        max = 1;
      }
      min = +min || 0;
      if (max == null) {
        max = min;
        min = 0;
      } else {
        max = +max || 0;
      }
      var rand = nativeRandom();
      return (min % 1 || max % 1)
        ? min + nativeMin(rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1))), max)
        : min + floor(rand * (max - min + 1));
    }

    /**
     * Resolves the value of `property` on `object`. If `property` is a function,
     * it will be invoked with the `this` binding of `object` and its result returned,
     * else the property value is returned. If `object` is falsey, then `undefined`
     * is returned.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Object} object The object to inspect.
     * @param {String} property The property to get the value of.
     * @returns {Mixed} Returns the resolved value.
     * @example
     *
     * var object = {
     *   'cheese': 'crumpets',
     *   'stuff': function() {
     *     return 'nonsense';
     *   }
     * };
     *
     * _.result(object, 'cheese');
     * // => 'crumpets'
     *
     * _.result(object, 'stuff');
     * // => 'nonsense'
     */
    function result(object, property) {
      var value = object ? object[property] : undefined;
      return isFunction(value) ? object[property]() : value;
    }

    /**
     * A micro-templating method that handles arbitrary delimiters, preserves
     * whitespace, and correctly escapes quotes within interpolated code.
     *
     * Note: In the development build, `_.template` utilizes sourceURLs for easier
     * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
     *
     * For more information on precompiling templates see:
     * http://lodash.com/#custom-builds
     *
     * For more information on Chrome extension sandboxes see:
     * http://developer.chrome.com/stable/extensions/sandboxingEval.html
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {String} text The template text.
     * @param {Object} data The data object used to populate the text.
     * @param {Object} options The options object.
     *  escape - The "escape" delimiter regexp.
     *  evaluate - The "evaluate" delimiter regexp.
     *  interpolate - The "interpolate" delimiter regexp.
     *  sourceURL - The sourceURL of the template's compiled source.
     *  variable - The data object variable name.
     * @returns {Function|String} Returns a compiled function when no `data` object
     *  is given, else it returns the interpolated text.
     * @example
     *
     * // using a compiled template
     * var compiled = _.template('hello <%= name %>');
     * compiled({ 'name': 'moe' });
     * // => 'hello moe'
     *
     * var list = '<% _.forEach(people, function(name) { %><li><%= name %></li><% }); %>';
     * _.template(list, { 'people': ['moe', 'larry'] });
     * // => '<li>moe</li><li>larry</li>'
     *
     * // using the "escape" delimiter to escape HTML in data property values
     * _.template('<b><%- value %></b>', { 'value': '<script>' });
     * // => '<b>&lt;script&gt;</b>'
     *
     * // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
     * _.template('hello ${ name }', { 'name': 'curly' });
     * // => 'hello curly'
     *
     * // using the internal `print` function in "evaluate" delimiters
     * _.template('<% print("hello " + epithet); %>!', { 'epithet': 'stooge' });
     * // => 'hello stooge!'
     *
     * // using custom template delimiters
     * _.templateSettings = {
     *   'interpolate': /{{([\s\S]+?)}}/g
     * };
     *
     * _.template('hello {{ name }}!', { 'name': 'mustache' });
     * // => 'hello mustache!'
     *
     * // using the `sourceURL` option to specify a custom sourceURL for the template
     * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
     * compiled(data);
     * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
     *
     * // using the `variable` option to ensure a with-statement isn't used in the compiled template
     * var compiled = _.template('hi <%= data.name %>!', null, { 'variable': 'data' });
     * compiled.source;
     * // => function(data) {
     *   var __t, __p = '', __e = _.escape;
     *   __p += 'hi ' + ((__t = ( data.name )) == null ? '' : __t) + '!';
     *   return __p;
     * }
     *
     * // using the `source` property to inline compiled templates for meaningful
     * // line numbers in error messages and a stack trace
     * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
     *   var JST = {\
     *     "main": ' + _.template(mainText).source + '\
     *   };\
     * ');
     */
    function template(text, data, options) {
      // based on John Resig's `tmpl` implementation
      // http://ejohn.org/blog/javascript-micro-templating/
      // and Laura Doktorova's doT.js
      // https://github.com/olado/doT
      var settings = lodash.templateSettings;
      text || (text = '');

      // avoid missing dependencies when `iteratorTemplate` is not defined
      options = defaults({}, options, settings);

      var imports = defaults({}, options.imports, settings.imports),
          importsKeys = keys(imports),
          importsValues = values(imports);

      var isEvaluating,
          index = 0,
          interpolate = options.interpolate || reNoMatch,
          source = "__p += '";

      // compile the regexp to match each delimiter
      var reDelimiters = RegExp(
        (options.escape || reNoMatch).source + '|' +
        interpolate.source + '|' +
        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
        (options.evaluate || reNoMatch).source + '|$'
      , 'g');

      text.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
        interpolateValue || (interpolateValue = esTemplateValue);

        // escape characters that cannot be included in string literals
        source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar);

        // replace delimiters with snippets
        if (escapeValue) {
          source += "' +\n__e(" + escapeValue + ") +\n'";
        }
        if (evaluateValue) {
          isEvaluating = true;
          source += "';\n" + evaluateValue + ";\n__p += '";
        }
        if (interpolateValue) {
          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
        }
        index = offset + match.length;

        // the JS engine embedded in Adobe products requires returning the `match`
        // string in order to produce the correct `offset` value
        return match;
      });

      source += "';\n";

      // if `variable` is not specified, wrap a with-statement around the generated
      // code to add the data object to the top of the scope chain
      var variable = options.variable,
          hasVariable = variable;

      if (!hasVariable) {
        variable = 'obj';
        source = 'with (' + variable + ') {\n' + source + '\n}\n';
      }
      // cleanup code by stripping empty strings
      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
        .replace(reEmptyStringMiddle, '$1')
        .replace(reEmptyStringTrailing, '$1;');

      // frame code as the function body
      source = 'function(' + variable + ') {\n' +
        (hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') +
        "var __t, __p = '', __e = _.escape" +
        (isEvaluating
          ? ', __j = Array.prototype.join;\n' +
            "function print() { __p += __j.call(arguments, '') }\n"
          : ';\n'
        ) +
        source +
        'return __p\n}';

      // Use a sourceURL for easier debugging and wrap in a multi-line comment to
      // avoid issues with Narwhal, IE conditional compilation, and the JS engine
      // embedded in Adobe products.
      // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
      var sourceURL = '\n/*\n//@ sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';

      try {
        var result = Function(importsKeys, 'return ' + source + sourceURL).apply(undefined, importsValues);
      } catch(e) {
        e.source = source;
        throw e;
      }
      if (data) {
        return result(data);
      }
      // provide the compiled function's source via its `toString` method, in
      // supported environments, or the `source` property as a convenience for
      // inlining compiled templates during the build process
      result.source = source;
      return result;
    }

    /**
     * Executes the `callback` function `n` times, returning an array of the results
     * of each `callback` execution. The `callback` is bound to `thisArg` and invoked
     * with one argument; (index).
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Number} n The number of times to execute the callback.
     * @param {Function} callback The function called per iteration.
     * @param {Mixed} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of the results of each `callback` execution.
     * @example
     *
     * var diceRolls = _.times(3, _.partial(_.random, 1, 6));
     * // => [3, 6, 4]
     *
     * _.times(3, function(n) { mage.castSpell(n); });
     * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
     *
     * _.times(3, function(n) { this.cast(n); }, mage);
     * // => also calls `mage.castSpell(n)` three times
     */
    function times(n, callback, thisArg) {
      n = (n = +n) > -1 ? n : 0;
      var index = -1,
          result = Array(n);

      callback = lodash.createCallback(callback, thisArg, 1);
      while (++index < n) {
        result[index] = callback(index);
      }
      return result;
    }

    /**
     * The inverse of `_.escape`, this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to their
     * corresponding characters.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {String} string The string to unescape.
     * @returns {String} Returns the unescaped string.
     * @example
     *
     * _.unescape('Moe, Larry &amp; Curly');
     * // => 'Moe, Larry & Curly'
     */
    function unescape(string) {
      return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar);
    }

    /**
     * Generates a unique ID. If `prefix` is passed, the ID will be appended to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {String} [prefix] The value to prefix the ID with.
     * @returns {String} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return String(prefix == null ? '' : prefix) + id;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Invokes `interceptor` with the `value` as the first argument, and then
     * returns `value`. The purpose of this method is to "tap into" a method chain,
     * in order to perform operations on intermediate results within the chain.
     *
     * @static
     * @memberOf _
     * @category Chaining
     * @param {Mixed} value The value to pass to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {Mixed} Returns `value`.
     * @example
     *
     * _([1, 2, 3, 4])
     *  .filter(function(num) { return num % 2 == 0; })
     *  .tap(alert)
     *  .map(function(num) { return num * num; })
     *  .value();
     * // => // [2, 4] (alerted)
     * // => [4, 16]
     */
    function tap(value, interceptor) {
      interceptor(value);
      return value;
    }

    /**
     * Produces the `toString` result of the wrapped value.
     *
     * @name toString
     * @memberOf _
     * @category Chaining
     * @returns {String} Returns the string result.
     * @example
     *
     * _([1, 2, 3]).toString();
     * // => '1,2,3'
     */
    function wrapperToString() {
      return String(this.__wrapped__);
    }

    /**
     * Extracts the wrapped value.
     *
     * @name valueOf
     * @memberOf _
     * @alias value
     * @category Chaining
     * @returns {Mixed} Returns the wrapped value.
     * @example
     *
     * _([1, 2, 3]).valueOf();
     * // => [1, 2, 3]
     */
    function wrapperValueOf() {
      return this.__wrapped__;
    }

    /*--------------------------------------------------------------------------*/

    // add functions that return wrapped values when chaining
    lodash.after = after;
    lodash.assign = assign;
    lodash.at = at;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.compact = compact;
    lodash.compose = compose;
    lodash.countBy = countBy;
    lodash.createCallback = createCallback;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.filter = filter;
    lodash.flatten = flatten;
    lodash.forEach = forEach;
    lodash.forIn = forIn;
    lodash.forOwn = forOwn;
    lodash.functions = functions;
    lodash.groupBy = groupBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.invert = invert;
    lodash.invoke = invoke;
    lodash.keys = keys;
    lodash.map = map;
    lodash.max = max;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.min = min;
    lodash.omit = omit;
    lodash.once = once;
    lodash.pairs = pairs;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.pick = pick;
    lodash.pluck = pluck;
    lodash.range = range;
    lodash.reject = reject;
    lodash.rest = rest;
    lodash.shuffle = shuffle;
    lodash.sortBy = sortBy;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.times = times;
    lodash.toArray = toArray;
    lodash.transform = transform;
    lodash.union = union;
    lodash.uniq = uniq;
    lodash.unzip = unzip;
    lodash.values = values;
    lodash.where = where;
    lodash.without = without;
    lodash.wrap = wrap;
    lodash.zip = zip;
    lodash.zipObject = zipObject;

    // add aliases
    lodash.collect = map;
    lodash.drop = rest;
    lodash.each = forEach;
    lodash.extend = assign;
    lodash.methods = functions;
    lodash.object = zipObject;
    lodash.select = filter;
    lodash.tail = rest;
    lodash.unique = uniq;

    // add functions to `lodash.prototype`
    mixin(lodash);

    // add Underscore compat
    lodash.chain = lodash;
    lodash.prototype.chain = function() { return this; };

    /*--------------------------------------------------------------------------*/

    // add functions that return unwrapped values when chaining
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.contains = contains;
    lodash.escape = escape;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.has = has;
    lodash.identity = identity;
    lodash.indexOf = indexOf;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isBoolean = isBoolean;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isNaN = isNaN;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isString = isString;
    lodash.isUndefined = isUndefined;
    lodash.lastIndexOf = lastIndexOf;
    lodash.mixin = mixin;
    lodash.noConflict = noConflict;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.result = result;
    lodash.runInContext = runInContext;
    lodash.size = size;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.template = template;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;

    // add aliases
    lodash.all = every;
    lodash.any = some;
    lodash.detect = find;
    lodash.findWhere = find;
    lodash.foldl = reduce;
    lodash.foldr = reduceRight;
    lodash.include = contains;
    lodash.inject = reduce;

    forOwn(lodash, function(func, methodName) {
      if (!lodash.prototype[methodName]) {
        lodash.prototype[methodName] = function() {
          var args = [this.__wrapped__];
          push.apply(args, arguments);
          return func.apply(lodash, args);
        };
      }
    });

    /*--------------------------------------------------------------------------*/

    // add functions capable of returning wrapped and unwrapped values when chaining
    lodash.first = first;
    lodash.last = last;

    // add aliases
    lodash.take = first;
    lodash.head = first;

    forOwn(lodash, function(func, methodName) {
      if (!lodash.prototype[methodName]) {
        lodash.prototype[methodName]= function(callback, thisArg) {
          var result = func(this.__wrapped__, callback, thisArg);
          return callback == null || (thisArg && typeof callback != 'function')
            ? result
            : new lodashWrapper(result);
        };
      }
    });

    /*--------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type String
     */
    lodash.VERSION = '1.3.1';

    // add "Chaining" functions to the wrapper
    lodash.prototype.toString = wrapperToString;
    lodash.prototype.value = wrapperValueOf;
    lodash.prototype.valueOf = wrapperValueOf;

    // add `Array` functions that return unwrapped values
    forEach(['join', 'pop', 'shift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        return func.apply(this.__wrapped__, arguments);
      };
    });

    // add `Array` functions that return the wrapped value
    forEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        func.apply(this.__wrapped__, arguments);
        return this;
      };
    });

    // add `Array` functions that return new wrapped values
    forEach(['concat', 'slice', 'splice'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        return new lodashWrapper(func.apply(this.__wrapped__, arguments));
      };
    });

    return lodash;
  }

  /*--------------------------------------------------------------------------*/

  // expose Lo-Dash
  var _ = runInContext();

  // some AMD build optimizers, like r.js, check for specific condition patterns like the following:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Expose Lo-Dash to the global object even when an AMD loader is present in
    // case Lo-Dash was injected by a third-party script and not intended to be
    // loaded as a module. The global assignment can be reverted in the Lo-Dash
    // module via its `noConflict()` method.
    window._ = _;

    // define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module
    define(function() {
      return _;
    });
  }
  // check for `exports` after `define` in case a build optimizer adds an `exports` object
  else if (freeExports && !freeExports.nodeType) {
    // in Node.js or RingoJS v0.8.0+
    if (freeModule) {
      (freeModule.exports = _)._ = _;
    }
    // in Narwhal or RingoJS v0.7.0-
    else {
      freeExports._ = _;
    }
  }
  else {
    // in a browser or Rhino
    window._ = _;
  }
}(this));

})(window)
},{}],7:[function(require,module,exports){
var relativeDate = (function(undefined){

  var SECOND = 1000,
      MINUTE = 60 * SECOND,
      HOUR = 60 * MINUTE,
      DAY = 24 * HOUR,
      WEEK = 7 * DAY,
      YEAR = DAY * 365,
      MONTH = YEAR / 12;

  var formats = [
    [ 0.7 * MINUTE, 'just now' ],
    [ 1.5 * MINUTE, 'a minute ago' ],
    [ 60 * MINUTE, 'minutes ago', MINUTE ],
    [ 1.5 * HOUR, 'an hour ago' ],
    [ DAY, 'hours ago', HOUR ],
    [ 2 * DAY, 'yesterday' ],
    [ 7 * DAY, 'days ago', DAY ],
    [ 1.5 * WEEK, 'a week ago'],
    [ MONTH, 'weeks ago', WEEK ],
    [ 1.5 * MONTH, 'a month ago' ],
    [ YEAR, 'months ago', MONTH ],
    [ 1.5 * YEAR, 'a year ago' ],
    [ Number.MAX_VALUE, 'years ago', YEAR ]
  ];

  function relativeDate(input,reference){
    !reference && ( reference = (new Date).getTime() );
    reference instanceof Date && ( reference = reference.getTime() );
    input instanceof Date && ( input = input.getTime() );
    
    var delta = reference - input,
        format, i, len;

    for(i = -1, len=formats.length; ++i < len; ){
      format = formats[i];
      if(delta < format[0]){
        return format[2] == undefined ? format[1] : Math.round(delta/format[2]) + ' ' + format[1];
      }
    };
  }

  return relativeDate;

})();

if(typeof module != 'undefined' && module.exports){
  module.exports = relativeDate;
}

},{}],8:[function(require,module,exports){
(function(){// moment.js
// version : 2.0.0
// author : Tim Wood
// license : MIT
// momentjs.com

(function (undefined) {

    /************************************
        Constants
    ************************************/

    var moment,
        VERSION = "2.0.0",
        round = Math.round, i,
        // internal storage for language config files
        languages = {},

        // check for nodeJS
        hasModule = (typeof module !== 'undefined' && module.exports),

        // ASP.NET json date format regex
        aspNetJsonRegex = /^\/?Date\((\-?\d+)/i,

        // format tokens
        formattingTokens = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|YYYYY|YYYY|YY|a|A|hh?|HH?|mm?|ss?|SS?S?|X|zz?|ZZ?|.)/g,
        localFormattingTokens = /(\[[^\[]*\])|(\\)?(LT|LL?L?L?|l{1,4})/g,

        // parsing tokens
        parseMultipleFormatChunker = /([0-9a-zA-Z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+)/gi,

        // parsing token regexes
        parseTokenOneOrTwoDigits = /\d\d?/, // 0 - 99
        parseTokenOneToThreeDigits = /\d{1,3}/, // 0 - 999
        parseTokenThreeDigits = /\d{3}/, // 000 - 999
        parseTokenFourDigits = /\d{1,4}/, // 0 - 9999
        parseTokenSixDigits = /[+\-]?\d{1,6}/, // -999,999 - 999,999
        parseTokenWord = /[0-9]*[a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+|[\u0600-\u06FF]+\s*?[\u0600-\u06FF]+/i, // any word (or two) characters or numbers including two word month in arabic.
        parseTokenTimezone = /Z|[\+\-]\d\d:?\d\d/i, // +00:00 -00:00 +0000 -0000 or Z
        parseTokenT = /T/i, // T (ISO seperator)
        parseTokenTimestampMs = /[\+\-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123

        // preliminary iso regex
        // 0000-00-00 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000
        isoRegex = /^\s*\d{4}-\d\d-\d\d((T| )(\d\d(:\d\d(:\d\d(\.\d\d?\d?)?)?)?)?([\+\-]\d\d:?\d\d)?)?/,
        isoFormat = 'YYYY-MM-DDTHH:mm:ssZ',

        // iso time formats and regexes
        isoTimes = [
            ['HH:mm:ss.S', /(T| )\d\d:\d\d:\d\d\.\d{1,3}/],
            ['HH:mm:ss', /(T| )\d\d:\d\d:\d\d/],
            ['HH:mm', /(T| )\d\d:\d\d/],
            ['HH', /(T| )\d\d/]
        ],

        // timezone chunker "+10:00" > ["10", "00"] or "-1530" > ["-15", "30"]
        parseTimezoneChunker = /([\+\-]|\d\d)/gi,

        // getter and setter names
        proxyGettersAndSetters = 'Month|Date|Hours|Minutes|Seconds|Milliseconds'.split('|'),
        unitMillisecondFactors = {
            'Milliseconds' : 1,
            'Seconds' : 1e3,
            'Minutes' : 6e4,
            'Hours' : 36e5,
            'Days' : 864e5,
            'Months' : 2592e6,
            'Years' : 31536e6
        },

        // format function strings
        formatFunctions = {},

        // tokens to ordinalize and pad
        ordinalizeTokens = 'DDD w W M D d'.split(' '),
        paddedTokens = 'M D H h m s w W'.split(' '),

        formatTokenFunctions = {
            M    : function () {
                return this.month() + 1;
            },
            MMM  : function (format) {
                return this.lang().monthsShort(this, format);
            },
            MMMM : function (format) {
                return this.lang().months(this, format);
            },
            D    : function () {
                return this.date();
            },
            DDD  : function () {
                return this.dayOfYear();
            },
            d    : function () {
                return this.day();
            },
            dd   : function (format) {
                return this.lang().weekdaysMin(this, format);
            },
            ddd  : function (format) {
                return this.lang().weekdaysShort(this, format);
            },
            dddd : function (format) {
                return this.lang().weekdays(this, format);
            },
            w    : function () {
                return this.week();
            },
            W    : function () {
                return this.isoWeek();
            },
            YY   : function () {
                return leftZeroFill(this.year() % 100, 2);
            },
            YYYY : function () {
                return leftZeroFill(this.year(), 4);
            },
            YYYYY : function () {
                return leftZeroFill(this.year(), 5);
            },
            a    : function () {
                return this.lang().meridiem(this.hours(), this.minutes(), true);
            },
            A    : function () {
                return this.lang().meridiem(this.hours(), this.minutes(), false);
            },
            H    : function () {
                return this.hours();
            },
            h    : function () {
                return this.hours() % 12 || 12;
            },
            m    : function () {
                return this.minutes();
            },
            s    : function () {
                return this.seconds();
            },
            S    : function () {
                return ~~(this.milliseconds() / 100);
            },
            SS   : function () {
                return leftZeroFill(~~(this.milliseconds() / 10), 2);
            },
            SSS  : function () {
                return leftZeroFill(this.milliseconds(), 3);
            },
            Z    : function () {
                var a = -this.zone(),
                    b = "+";
                if (a < 0) {
                    a = -a;
                    b = "-";
                }
                return b + leftZeroFill(~~(a / 60), 2) + ":" + leftZeroFill(~~a % 60, 2);
            },
            ZZ   : function () {
                var a = -this.zone(),
                    b = "+";
                if (a < 0) {
                    a = -a;
                    b = "-";
                }
                return b + leftZeroFill(~~(10 * a / 6), 4);
            },
            X    : function () {
                return this.unix();
            }
        };

    function padToken(func, count) {
        return function (a) {
            return leftZeroFill(func.call(this, a), count);
        };
    }
    function ordinalizeToken(func) {
        return function (a) {
            return this.lang().ordinal(func.call(this, a));
        };
    }

    while (ordinalizeTokens.length) {
        i = ordinalizeTokens.pop();
        formatTokenFunctions[i + 'o'] = ordinalizeToken(formatTokenFunctions[i]);
    }
    while (paddedTokens.length) {
        i = paddedTokens.pop();
        formatTokenFunctions[i + i] = padToken(formatTokenFunctions[i], 2);
    }
    formatTokenFunctions.DDDD = padToken(formatTokenFunctions.DDD, 3);


    /************************************
        Constructors
    ************************************/

    function Language() {

    }

    // Moment prototype object
    function Moment(config) {
        extend(this, config);
    }

    // Duration Constructor
    function Duration(duration) {
        var data = this._data = {},
            years = duration.years || duration.year || duration.y || 0,
            months = duration.months || duration.month || duration.M || 0,
            weeks = duration.weeks || duration.week || duration.w || 0,
            days = duration.days || duration.day || duration.d || 0,
            hours = duration.hours || duration.hour || duration.h || 0,
            minutes = duration.minutes || duration.minute || duration.m || 0,
            seconds = duration.seconds || duration.second || duration.s || 0,
            milliseconds = duration.milliseconds || duration.millisecond || duration.ms || 0;

        // representation for dateAddRemove
        this._milliseconds = milliseconds +
            seconds * 1e3 + // 1000
            minutes * 6e4 + // 1000 * 60
            hours * 36e5; // 1000 * 60 * 60
        // Because of dateAddRemove treats 24 hours as different from a
        // day when working around DST, we need to store them separately
        this._days = days +
            weeks * 7;
        // It is impossible translate months into days without knowing
        // which months you are are talking about, so we have to store
        // it separately.
        this._months = months +
            years * 12;

        // The following code bubbles up values, see the tests for
        // examples of what that means.
        data.milliseconds = milliseconds % 1000;
        seconds += absRound(milliseconds / 1000);

        data.seconds = seconds % 60;
        minutes += absRound(seconds / 60);

        data.minutes = minutes % 60;
        hours += absRound(minutes / 60);

        data.hours = hours % 24;
        days += absRound(hours / 24);

        days += weeks * 7;
        data.days = days % 30;

        months += absRound(days / 30);

        data.months = months % 12;
        years += absRound(months / 12);

        data.years = years;
    }


    /************************************
        Helpers
    ************************************/


    function extend(a, b) {
        for (var i in b) {
            if (b.hasOwnProperty(i)) {
                a[i] = b[i];
            }
        }
        return a;
    }

    function absRound(number) {
        if (number < 0) {
            return Math.ceil(number);
        } else {
            return Math.floor(number);
        }
    }

    // left zero fill a number
    // see http://jsperf.com/left-zero-filling for performance comparison
    function leftZeroFill(number, targetLength) {
        var output = number + '';
        while (output.length < targetLength) {
            output = '0' + output;
        }
        return output;
    }

    // helper function for _.addTime and _.subtractTime
    function addOrSubtractDurationFromMoment(mom, duration, isAdding) {
        var ms = duration._milliseconds,
            d = duration._days,
            M = duration._months,
            currentDate;

        if (ms) {
            mom._d.setTime(+mom + ms * isAdding);
        }
        if (d) {
            mom.date(mom.date() + d * isAdding);
        }
        if (M) {
            currentDate = mom.date();
            mom.date(1)
                .month(mom.month() + M * isAdding)
                .date(Math.min(currentDate, mom.daysInMonth()));
        }
    }

    // check if is an array
    function isArray(input) {
        return Object.prototype.toString.call(input) === '[object Array]';
    }

    // compare two arrays, return the number of differences
    function compareArrays(array1, array2) {
        var len = Math.min(array1.length, array2.length),
            lengthDiff = Math.abs(array1.length - array2.length),
            diffs = 0,
            i;
        for (i = 0; i < len; i++) {
            if (~~array1[i] !== ~~array2[i]) {
                diffs++;
            }
        }
        return diffs + lengthDiff;
    }


    /************************************
        Languages
    ************************************/


    Language.prototype = {
        set : function (config) {
            var prop, i;
            for (i in config) {
                prop = config[i];
                if (typeof prop === 'function') {
                    this[i] = prop;
                } else {
                    this['_' + i] = prop;
                }
            }
        },

        _months : "January_February_March_April_May_June_July_August_September_October_November_December".split("_"),
        months : function (m) {
            return this._months[m.month()];
        },

        _monthsShort : "Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec".split("_"),
        monthsShort : function (m) {
            return this._monthsShort[m.month()];
        },

        monthsParse : function (monthName) {
            var i, mom, regex, output;

            if (!this._monthsParse) {
                this._monthsParse = [];
            }

            for (i = 0; i < 12; i++) {
                // make the regex if we don't have it already
                if (!this._monthsParse[i]) {
                    mom = moment([2000, i]);
                    regex = '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
                    this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
                }
                // test the regex
                if (this._monthsParse[i].test(monthName)) {
                    return i;
                }
            }
        },

        _weekdays : "Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday".split("_"),
        weekdays : function (m) {
            return this._weekdays[m.day()];
        },

        _weekdaysShort : "Sun_Mon_Tue_Wed_Thu_Fri_Sat".split("_"),
        weekdaysShort : function (m) {
            return this._weekdaysShort[m.day()];
        },

        _weekdaysMin : "Su_Mo_Tu_We_Th_Fr_Sa".split("_"),
        weekdaysMin : function (m) {
            return this._weekdaysMin[m.day()];
        },

        _longDateFormat : {
            LT : "h:mm A",
            L : "MM/DD/YYYY",
            LL : "MMMM D YYYY",
            LLL : "MMMM D YYYY LT",
            LLLL : "dddd, MMMM D YYYY LT"
        },
        longDateFormat : function (key) {
            var output = this._longDateFormat[key];
            if (!output && this._longDateFormat[key.toUpperCase()]) {
                output = this._longDateFormat[key.toUpperCase()].replace(/MMMM|MM|DD|dddd/g, function (val) {
                    return val.slice(1);
                });
                this._longDateFormat[key] = output;
            }
            return output;
        },

        meridiem : function (hours, minutes, isLower) {
            if (hours > 11) {
                return isLower ? 'pm' : 'PM';
            } else {
                return isLower ? 'am' : 'AM';
            }
        },

        _calendar : {
            sameDay : '[Today at] LT',
            nextDay : '[Tomorrow at] LT',
            nextWeek : 'dddd [at] LT',
            lastDay : '[Yesterday at] LT',
            lastWeek : '[last] dddd [at] LT',
            sameElse : 'L'
        },
        calendar : function (key, mom) {
            var output = this._calendar[key];
            return typeof output === 'function' ? output.apply(mom) : output;
        },

        _relativeTime : {
            future : "in %s",
            past : "%s ago",
            s : "a few seconds",
            m : "a minute",
            mm : "%d minutes",
            h : "an hour",
            hh : "%d hours",
            d : "a day",
            dd : "%d days",
            M : "a month",
            MM : "%d months",
            y : "a year",
            yy : "%d years"
        },
        relativeTime : function (number, withoutSuffix, string, isFuture) {
            var output = this._relativeTime[string];
            return (typeof output === 'function') ?
                output(number, withoutSuffix, string, isFuture) :
                output.replace(/%d/i, number);
        },
        pastFuture : function (diff, output) {
            var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
            return typeof format === 'function' ? format(output) : format.replace(/%s/i, output);
        },

        ordinal : function (number) {
            return this._ordinal.replace("%d", number);
        },
        _ordinal : "%d",

        preparse : function (string) {
            return string;
        },

        postformat : function (string) {
            return string;
        },

        week : function (mom) {
            return weekOfYear(mom, this._week.dow, this._week.doy);
        },
        _week : {
            dow : 0, // Sunday is the first day of the week.
            doy : 6  // The week that contains Jan 1st is the first week of the year.
        }
    };

    // Loads a language definition into the `languages` cache.  The function
    // takes a key and optionally values.  If not in the browser and no values
    // are provided, it will load the language file module.  As a convenience,
    // this function also returns the language values.
    function loadLang(key, values) {
        values.abbr = key;
        if (!languages[key]) {
            languages[key] = new Language();
        }
        languages[key].set(values);
        return languages[key];
    }

    // Determines which language definition to use and returns it.
    //
    // With no parameters, it will return the global language.  If you
    // pass in a language key, such as 'en', it will return the
    // definition for 'en', so long as 'en' has already been loaded using
    // moment.lang.
    function getLangDefinition(key) {
        if (!key) {
            return moment.fn._lang;
        }
        if (!languages[key] && hasModule) {
            require('./lang/' + key);
        }
        return languages[key];
    }


    /************************************
        Formatting
    ************************************/


    function removeFormattingTokens(input) {
        if (input.match(/\[.*\]/)) {
            return input.replace(/^\[|\]$/g, "");
        }
        return input.replace(/\\/g, "");
    }

    function makeFormatFunction(format) {
        var array = format.match(formattingTokens), i, length;

        for (i = 0, length = array.length; i < length; i++) {
            if (formatTokenFunctions[array[i]]) {
                array[i] = formatTokenFunctions[array[i]];
            } else {
                array[i] = removeFormattingTokens(array[i]);
            }
        }

        return function (mom) {
            var output = "";
            for (i = 0; i < length; i++) {
                output += typeof array[i].call === 'function' ? array[i].call(mom, format) : array[i];
            }
            return output;
        };
    }

    // format date using native date object
    function formatMoment(m, format) {
        var i = 5;

        function replaceLongDateFormatTokens(input) {
            return m.lang().longDateFormat(input) || input;
        }

        while (i-- && localFormattingTokens.test(format)) {
            format = format.replace(localFormattingTokens, replaceLongDateFormatTokens);
        }

        if (!formatFunctions[format]) {
            formatFunctions[format] = makeFormatFunction(format);
        }

        return formatFunctions[format](m);
    }


    /************************************
        Parsing
    ************************************/


    // get the regex to find the next token
    function getParseRegexForToken(token) {
        switch (token) {
        case 'DDDD':
            return parseTokenThreeDigits;
        case 'YYYY':
            return parseTokenFourDigits;
        case 'YYYYY':
            return parseTokenSixDigits;
        case 'S':
        case 'SS':
        case 'SSS':
        case 'DDD':
            return parseTokenOneToThreeDigits;
        case 'MMM':
        case 'MMMM':
        case 'dd':
        case 'ddd':
        case 'dddd':
        case 'a':
        case 'A':
            return parseTokenWord;
        case 'X':
            return parseTokenTimestampMs;
        case 'Z':
        case 'ZZ':
            return parseTokenTimezone;
        case 'T':
            return parseTokenT;
        case 'MM':
        case 'DD':
        case 'YY':
        case 'HH':
        case 'hh':
        case 'mm':
        case 'ss':
        case 'M':
        case 'D':
        case 'd':
        case 'H':
        case 'h':
        case 'm':
        case 's':
            return parseTokenOneOrTwoDigits;
        default :
            return new RegExp(token.replace('\\', ''));
        }
    }

    // function to convert string input to date
    function addTimeToArrayFromToken(token, input, config) {
        var a, b,
            datePartArray = config._a;

        switch (token) {
        // MONTH
        case 'M' : // fall through to MM
        case 'MM' :
            datePartArray[1] = (input == null) ? 0 : ~~input - 1;
            break;
        case 'MMM' : // fall through to MMMM
        case 'MMMM' :
            a = getLangDefinition(config._l).monthsParse(input);
            // if we didn't find a month name, mark the date as invalid.
            if (a != null) {
                datePartArray[1] = a;
            } else {
                config._isValid = false;
            }
            break;
        // DAY OF MONTH
        case 'D' : // fall through to DDDD
        case 'DD' : // fall through to DDDD
        case 'DDD' : // fall through to DDDD
        case 'DDDD' :
            if (input != null) {
                datePartArray[2] = ~~input;
            }
            break;
        // YEAR
        case 'YY' :
            datePartArray[0] = ~~input + (~~input > 68 ? 1900 : 2000);
            break;
        case 'YYYY' :
        case 'YYYYY' :
            datePartArray[0] = ~~input;
            break;
        // AM / PM
        case 'a' : // fall through to A
        case 'A' :
            config._isPm = ((input + '').toLowerCase() === 'pm');
            break;
        // 24 HOUR
        case 'H' : // fall through to hh
        case 'HH' : // fall through to hh
        case 'h' : // fall through to hh
        case 'hh' :
            datePartArray[3] = ~~input;
            break;
        // MINUTE
        case 'm' : // fall through to mm
        case 'mm' :
            datePartArray[4] = ~~input;
            break;
        // SECOND
        case 's' : // fall through to ss
        case 'ss' :
            datePartArray[5] = ~~input;
            break;
        // MILLISECOND
        case 'S' :
        case 'SS' :
        case 'SSS' :
            datePartArray[6] = ~~ (('0.' + input) * 1000);
            break;
        // UNIX TIMESTAMP WITH MS
        case 'X':
            config._d = new Date(parseFloat(input) * 1000);
            break;
        // TIMEZONE
        case 'Z' : // fall through to ZZ
        case 'ZZ' :
            config._useUTC = true;
            a = (input + '').match(parseTimezoneChunker);
            if (a && a[1]) {
                config._tzh = ~~a[1];
            }
            if (a && a[2]) {
                config._tzm = ~~a[2];
            }
            // reverse offsets
            if (a && a[0] === '+') {
                config._tzh = -config._tzh;
                config._tzm = -config._tzm;
            }
            break;
        }

        // if the input is null, the date is not valid
        if (input == null) {
            config._isValid = false;
        }
    }

    // convert an array to a date.
    // the array should mirror the parameters below
    // note: all values past the year are optional and will default to the lowest possible value.
    // [year, month, day , hour, minute, second, millisecond]
    function dateFromArray(config) {
        var i, date, input = [];

        if (config._d) {
            return;
        }

        for (i = 0; i < 7; i++) {
            config._a[i] = input[i] = (config._a[i] == null) ? (i === 2 ? 1 : 0) : config._a[i];
        }

        // add the offsets to the time to be parsed so that we can have a clean array for checking isValid
        input[3] += config._tzh || 0;
        input[4] += config._tzm || 0;

        date = new Date(0);

        if (config._useUTC) {
            date.setUTCFullYear(input[0], input[1], input[2]);
            date.setUTCHours(input[3], input[4], input[5], input[6]);
        } else {
            date.setFullYear(input[0], input[1], input[2]);
            date.setHours(input[3], input[4], input[5], input[6]);
        }

        config._d = date;
    }

    // date from string and format string
    function makeDateFromStringAndFormat(config) {
        // This array is used to make a Date, either with `new Date` or `Date.UTC`
        var tokens = config._f.match(formattingTokens),
            string = config._i,
            i, parsedInput;

        config._a = [];

        for (i = 0; i < tokens.length; i++) {
            parsedInput = (getParseRegexForToken(tokens[i]).exec(string) || [])[0];
            if (parsedInput) {
                string = string.slice(string.indexOf(parsedInput) + parsedInput.length);
            }
            // don't parse if its not a known token
            if (formatTokenFunctions[tokens[i]]) {
                addTimeToArrayFromToken(tokens[i], parsedInput, config);
            }
        }
        // handle am pm
        if (config._isPm && config._a[3] < 12) {
            config._a[3] += 12;
        }
        // if is 12 am, change hours to 0
        if (config._isPm === false && config._a[3] === 12) {
            config._a[3] = 0;
        }
        // return
        dateFromArray(config);
    }

    // date from string and array of format strings
    function makeDateFromStringAndArray(config) {
        var tempConfig,
            tempMoment,
            bestMoment,

            scoreToBeat = 99,
            i,
            currentDate,
            currentScore;

        while (config._f.length) {
            tempConfig = extend({}, config);
            tempConfig._f = config._f.pop();
            makeDateFromStringAndFormat(tempConfig);
            tempMoment = new Moment(tempConfig);

            if (tempMoment.isValid()) {
                bestMoment = tempMoment;
                break;
            }

            currentScore = compareArrays(tempConfig._a, tempMoment.toArray());

            if (currentScore < scoreToBeat) {
                scoreToBeat = currentScore;
                bestMoment = tempMoment;
            }
        }

        extend(config, bestMoment);
    }

    // date from iso format
    function makeDateFromString(config) {
        var i,
            string = config._i;
        if (isoRegex.exec(string)) {
            config._f = 'YYYY-MM-DDT';
            for (i = 0; i < 4; i++) {
                if (isoTimes[i][1].exec(string)) {
                    config._f += isoTimes[i][0];
                    break;
                }
            }
            if (parseTokenTimezone.exec(string)) {
                config._f += " Z";
            }
            makeDateFromStringAndFormat(config);
        } else {
            config._d = new Date(string);
        }
    }

    function makeDateFromInput(config) {
        var input = config._i,
            matched = aspNetJsonRegex.exec(input);

        if (input === undefined) {
            config._d = new Date();
        } else if (matched) {
            config._d = new Date(+matched[1]);
        } else if (typeof input === 'string') {
            makeDateFromString(config);
        } else if (isArray(input)) {
            config._a = input.slice(0);
            dateFromArray(config);
        } else {
            config._d = input instanceof Date ? new Date(+input) : new Date(input);
        }
    }


    /************************************
        Relative Time
    ************************************/


    // helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
    function substituteTimeAgo(string, number, withoutSuffix, isFuture, lang) {
        return lang.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
    }

    function relativeTime(milliseconds, withoutSuffix, lang) {
        var seconds = round(Math.abs(milliseconds) / 1000),
            minutes = round(seconds / 60),
            hours = round(minutes / 60),
            days = round(hours / 24),
            years = round(days / 365),
            args = seconds < 45 && ['s', seconds] ||
                minutes === 1 && ['m'] ||
                minutes < 45 && ['mm', minutes] ||
                hours === 1 && ['h'] ||
                hours < 22 && ['hh', hours] ||
                days === 1 && ['d'] ||
                days <= 25 && ['dd', days] ||
                days <= 45 && ['M'] ||
                days < 345 && ['MM', round(days / 30)] ||
                years === 1 && ['y'] || ['yy', years];
        args[2] = withoutSuffix;
        args[3] = milliseconds > 0;
        args[4] = lang;
        return substituteTimeAgo.apply({}, args);
    }


    /************************************
        Week of Year
    ************************************/


    // firstDayOfWeek       0 = sun, 6 = sat
    //                      the day of the week that starts the week
    //                      (usually sunday or monday)
    // firstDayOfWeekOfYear 0 = sun, 6 = sat
    //                      the first week is the week that contains the first
    //                      of this day of the week
    //                      (eg. ISO weeks use thursday (4))
    function weekOfYear(mom, firstDayOfWeek, firstDayOfWeekOfYear) {
        var end = firstDayOfWeekOfYear - firstDayOfWeek,
            daysToDayOfWeek = firstDayOfWeekOfYear - mom.day();


        if (daysToDayOfWeek > end) {
            daysToDayOfWeek -= 7;
        }

        if (daysToDayOfWeek < end - 7) {
            daysToDayOfWeek += 7;
        }

        return Math.ceil(moment(mom).add('d', daysToDayOfWeek).dayOfYear() / 7);
    }


    /************************************
        Top Level Functions
    ************************************/

    function makeMoment(config) {
        var input = config._i,
            format = config._f;

        if (input === null || input === '') {
            return null;
        }

        if (typeof input === 'string') {
            config._i = input = getLangDefinition().preparse(input);
        }

        if (moment.isMoment(input)) {
            config = extend({}, input);
            config._d = new Date(+input._d);
        } else if (format) {
            if (isArray(format)) {
                makeDateFromStringAndArray(config);
            } else {
                makeDateFromStringAndFormat(config);
            }
        } else {
            makeDateFromInput(config);
        }

        return new Moment(config);
    }

    moment = function (input, format, lang) {
        return makeMoment({
            _i : input,
            _f : format,
            _l : lang,
            _isUTC : false
        });
    };

    // creating with utc
    moment.utc = function (input, format, lang) {
        return makeMoment({
            _useUTC : true,
            _isUTC : true,
            _l : lang,
            _i : input,
            _f : format
        });
    };

    // creating with unix timestamp (in seconds)
    moment.unix = function (input) {
        return moment(input * 1000);
    };

    // duration
    moment.duration = function (input, key) {
        var isDuration = moment.isDuration(input),
            isNumber = (typeof input === 'number'),
            duration = (isDuration ? input._data : (isNumber ? {} : input)),
            ret;

        if (isNumber) {
            if (key) {
                duration[key] = input;
            } else {
                duration.milliseconds = input;
            }
        }

        ret = new Duration(duration);

        if (isDuration && input.hasOwnProperty('_lang')) {
            ret._lang = input._lang;
        }

        return ret;
    };

    // version number
    moment.version = VERSION;

    // default format
    moment.defaultFormat = isoFormat;

    // This function will load languages and then set the global language.  If
    // no arguments are passed in, it will simply return the current global
    // language key.
    moment.lang = function (key, values) {
        var i;

        if (!key) {
            return moment.fn._lang._abbr;
        }
        if (values) {
            loadLang(key, values);
        } else if (!languages[key]) {
            getLangDefinition(key);
        }
        moment.duration.fn._lang = moment.fn._lang = getLangDefinition(key);
    };

    // returns language data
    moment.langData = function (key) {
        if (key && key._lang && key._lang._abbr) {
            key = key._lang._abbr;
        }
        return getLangDefinition(key);
    };

    // compare moment object
    moment.isMoment = function (obj) {
        return obj instanceof Moment;
    };

    // for typechecking Duration objects
    moment.isDuration = function (obj) {
        return obj instanceof Duration;
    };


    /************************************
        Moment Prototype
    ************************************/


    moment.fn = Moment.prototype = {

        clone : function () {
            return moment(this);
        },

        valueOf : function () {
            return +this._d;
        },

        unix : function () {
            return Math.floor(+this._d / 1000);
        },

        toString : function () {
            return this.format("ddd MMM DD YYYY HH:mm:ss [GMT]ZZ");
        },

        toDate : function () {
            return this._d;
        },

        toJSON : function () {
            return moment.utc(this).format('YYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
        },

        toArray : function () {
            var m = this;
            return [
                m.year(),
                m.month(),
                m.date(),
                m.hours(),
                m.minutes(),
                m.seconds(),
                m.milliseconds()
            ];
        },

        isValid : function () {
            if (this._isValid == null) {
                if (this._a) {
                    this._isValid = !compareArrays(this._a, (this._isUTC ? moment.utc(this._a) : moment(this._a)).toArray());
                } else {
                    this._isValid = !isNaN(this._d.getTime());
                }
            }
            return !!this._isValid;
        },

        utc : function () {
            this._isUTC = true;
            return this;
        },

        local : function () {
            this._isUTC = false;
            return this;
        },

        format : function (inputString) {
            var output = formatMoment(this, inputString || moment.defaultFormat);
            return this.lang().postformat(output);
        },

        add : function (input, val) {
            var dur;
            // switch args to support add('s', 1) and add(1, 's')
            if (typeof input === 'string') {
                dur = moment.duration(+val, input);
            } else {
                dur = moment.duration(input, val);
            }
            addOrSubtractDurationFromMoment(this, dur, 1);
            return this;
        },

        subtract : function (input, val) {
            var dur;
            // switch args to support subtract('s', 1) and subtract(1, 's')
            if (typeof input === 'string') {
                dur = moment.duration(+val, input);
            } else {
                dur = moment.duration(input, val);
            }
            addOrSubtractDurationFromMoment(this, dur, -1);
            return this;
        },

        diff : function (input, units, asFloat) {
            var that = this._isUTC ? moment(input).utc() : moment(input).local(),
                zoneDiff = (this.zone() - that.zone()) * 6e4,
                diff, output;

            if (units) {
                // standardize on singular form
                units = units.replace(/s$/, '');
            }

            if (units === 'year' || units === 'month') {
                diff = (this.daysInMonth() + that.daysInMonth()) * 432e5; // 24 * 60 * 60 * 1000 / 2
                output = ((this.year() - that.year()) * 12) + (this.month() - that.month());
                output += ((this - moment(this).startOf('month')) - (that - moment(that).startOf('month'))) / diff;
                if (units === 'year') {
                    output = output / 12;
                }
            } else {
                diff = (this - that) - zoneDiff;
                output = units === 'second' ? diff / 1e3 : // 1000
                    units === 'minute' ? diff / 6e4 : // 1000 * 60
                    units === 'hour' ? diff / 36e5 : // 1000 * 60 * 60
                    units === 'day' ? diff / 864e5 : // 1000 * 60 * 60 * 24
                    units === 'week' ? diff / 6048e5 : // 1000 * 60 * 60 * 24 * 7
                    diff;
            }
            return asFloat ? output : absRound(output);
        },

        from : function (time, withoutSuffix) {
            return moment.duration(this.diff(time)).lang(this.lang()._abbr).humanize(!withoutSuffix);
        },

        fromNow : function (withoutSuffix) {
            return this.from(moment(), withoutSuffix);
        },

        calendar : function () {
            var diff = this.diff(moment().startOf('day'), 'days', true),
                format = diff < -6 ? 'sameElse' :
                diff < -1 ? 'lastWeek' :
                diff < 0 ? 'lastDay' :
                diff < 1 ? 'sameDay' :
                diff < 2 ? 'nextDay' :
                diff < 7 ? 'nextWeek' : 'sameElse';
            return this.format(this.lang().calendar(format, this));
        },

        isLeapYear : function () {
            var year = this.year();
            return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
        },

        isDST : function () {
            return (this.zone() < moment([this.year()]).zone() ||
                this.zone() < moment([this.year(), 5]).zone());
        },

        day : function (input) {
            var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
            return input == null ? day :
                this.add({ d : input - day });
        },

        startOf: function (units) {
            units = units.replace(/s$/, '');
            // the following switch intentionally omits break keywords
            // to utilize falling through the cases.
            switch (units) {
            case 'year':
                this.month(0);
                /* falls through */
            case 'month':
                this.date(1);
                /* falls through */
            case 'week':
            case 'day':
                this.hours(0);
                /* falls through */
            case 'hour':
                this.minutes(0);
                /* falls through */
            case 'minute':
                this.seconds(0);
                /* falls through */
            case 'second':
                this.milliseconds(0);
                /* falls through */
            }

            // weeks are a special case
            if (units === 'week') {
                this.day(0);
            }

            return this;
        },

        endOf: function (units) {
            return this.startOf(units).add(units.replace(/s?$/, 's'), 1).subtract('ms', 1);
        },

        isAfter: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) > +moment(input).startOf(units);
        },

        isBefore: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) < +moment(input).startOf(units);
        },

        isSame: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) === +moment(input).startOf(units);
        },

        zone : function () {
            return this._isUTC ? 0 : this._d.getTimezoneOffset();
        },

        daysInMonth : function () {
            return moment.utc([this.year(), this.month() + 1, 0]).date();
        },

        dayOfYear : function (input) {
            var dayOfYear = round((moment(this).startOf('day') - moment(this).startOf('year')) / 864e5) + 1;
            return input == null ? dayOfYear : this.add("d", (input - dayOfYear));
        },

        isoWeek : function (input) {
            var week = weekOfYear(this, 1, 4);
            return input == null ? week : this.add("d", (input - week) * 7);
        },

        week : function (input) {
            var week = this.lang().week(this);
            return input == null ? week : this.add("d", (input - week) * 7);
        },

        // If passed a language key, it will set the language for this
        // instance.  Otherwise, it will return the language configuration
        // variables for this instance.
        lang : function (key) {
            if (key === undefined) {
                return this._lang;
            } else {
                this._lang = getLangDefinition(key);
                return this;
            }
        }
    };

    // helper for adding shortcuts
    function makeGetterAndSetter(name, key) {
        moment.fn[name] = moment.fn[name + 's'] = function (input) {
            var utc = this._isUTC ? 'UTC' : '';
            if (input != null) {
                this._d['set' + utc + key](input);
                return this;
            } else {
                return this._d['get' + utc + key]();
            }
        };
    }

    // loop through and add shortcuts (Month, Date, Hours, Minutes, Seconds, Milliseconds)
    for (i = 0; i < proxyGettersAndSetters.length; i ++) {
        makeGetterAndSetter(proxyGettersAndSetters[i].toLowerCase().replace(/s$/, ''), proxyGettersAndSetters[i]);
    }

    // add shortcut for year (uses different syntax than the getter/setter 'year' == 'FullYear')
    makeGetterAndSetter('year', 'FullYear');

    // add plural methods
    moment.fn.days = moment.fn.day;
    moment.fn.weeks = moment.fn.week;
    moment.fn.isoWeeks = moment.fn.isoWeek;

    /************************************
        Duration Prototype
    ************************************/


    moment.duration.fn = Duration.prototype = {
        weeks : function () {
            return absRound(this.days() / 7);
        },

        valueOf : function () {
            return this._milliseconds +
              this._days * 864e5 +
              this._months * 2592e6;
        },

        humanize : function (withSuffix) {
            var difference = +this,
                output = relativeTime(difference, !withSuffix, this.lang());

            if (withSuffix) {
                output = this.lang().pastFuture(difference, output);
            }

            return this.lang().postformat(output);
        },

        lang : moment.fn.lang
    };

    function makeDurationGetter(name) {
        moment.duration.fn[name] = function () {
            return this._data[name];
        };
    }

    function makeDurationAsGetter(name, factor) {
        moment.duration.fn['as' + name] = function () {
            return +this / factor;
        };
    }

    for (i in unitMillisecondFactors) {
        if (unitMillisecondFactors.hasOwnProperty(i)) {
            makeDurationAsGetter(i, unitMillisecondFactors[i]);
            makeDurationGetter(i.toLowerCase());
        }
    }

    makeDurationAsGetter('Weeks', 6048e5);


    /************************************
        Default Lang
    ************************************/


    // Set default language, other languages will inherit from English.
    moment.lang('en', {
        ordinal : function (number) {
            var b = number % 10,
                output = (~~ (number % 100 / 10) === 1) ? 'th' :
                (b === 1) ? 'st' :
                (b === 2) ? 'nd' :
                (b === 3) ? 'rd' : 'th';
            return number + output;
        }
    });


    /************************************
        Exposing Moment
    ************************************/


    // CommonJS module is defined
    if (hasModule) {
        module.exports = moment;
    }
    /*global ender:false */
    if (typeof ender === 'undefined') {
        // here, `this` means `window` in the browser, or `global` on the server
        // add `moment` as a global object via a string identifier,
        // for Closure Compiler "advanced" mode
        this['moment'] = moment;
    }
    /*global define:false */
    if (typeof define === "function" && define.amd) {
        define("moment", [], function () {
            return moment;
        });
    }
}).call(this);

})()
},{}]},{},[1])
;