From 176b109ae7ae51d50a4ca986ecfb8028c4edfccd Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Mon, 20 Oct 2014 20:10:25 -0700
Subject: [PATCH] Rebuild dist.

---
 dist/lodash.compat.js         | 1063 +++++++++++++++++++++++----------
 dist/lodash.compat.min.js     |  151 ++---
 dist/lodash.js                | 1032 +++++++++++++++++++++++---------
 dist/lodash.min.js            |  142 ++---
 dist/lodash.underscore.js     |  424 ++++++-------
 dist/lodash.underscore.min.js |   83 ++-
 6 files changed, 1929 insertions(+), 966 deletions(-)

diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index 41d710b07..fbcb81dc9 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -32,20 +32,14 @@
   var HOT_COUNT = 150,
       HOT_SPAN = 16;
 
-  /** Used as the TypeError message for "Functions" methods */
+  /** Used to indicate the type of lazy iteratees */
+  var LAZY_FILTER_FLAG = 1,
+      LAZY_MAP_FLAG = 2,
+      LAZY_WHILE_FLAG = 3;
+
+  /** Used as the `TypeError` message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
-  /** Used as references for the max length and index of an array */
-  var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
-      MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
-
-  /**
-   * Used as the maximum length of an array-like value.
-   * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
-   * for more details.
-   */
-  var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
-
   /** Used as the internal argument placeholder */
   var PLACEHOLDER = '__lodash_placeholder__';
 
@@ -206,6 +200,27 @@
     'trailing': false
   };
 
+  /** Used to map latin-1 supplementary letters to basic latin letters */
+  var deburredLetters = {
+    '\xC0': 'A',  '\xC1': 'A', '\xC2': 'A', '\xC3': 'A', '\xC4': 'A', '\xC5': 'A',
+    '\xE0': 'a',  '\xE1': 'a', '\xE2': 'a', '\xE3': 'a', '\xE4': 'a', '\xE5': 'a',
+    '\xC7': 'C',  '\xE7': 'c',
+    '\xD0': 'D',  '\xF0': 'd',
+    '\xC8': 'E',  '\xC9': 'E', '\xCA': 'E', '\xCB': 'E',
+    '\xE8': 'e',  '\xE9': 'e', '\xEA': 'e', '\xEB': 'e',
+    '\xCC': 'I',  '\xCD': 'I', '\xCE': 'I', '\xCF': 'I',
+    '\xEC': 'i',  '\xED': 'i', '\xEE': 'i', '\xEF': 'i',
+    '\xD1': 'N',  '\xF1': 'n',
+    '\xD2': 'O',  '\xD3': 'O', '\xD4': 'O', '\xD5': 'O', '\xD6': 'O', '\xD8': 'O',
+    '\xF2': 'o',  '\xF3': 'o', '\xF4': 'o', '\xF5': 'o', '\xF6': 'o', '\xF8': 'o',
+    '\xD9': 'U',  '\xDA': 'U', '\xDB': 'U', '\xDC': 'U',
+    '\xF9': 'u',  '\xFA': 'u', '\xFB': 'u', '\xFC': 'u',
+    '\xDD': 'Y',  '\xFD': 'y', '\xFF': 'y',
+    '\xC6': 'Ae', '\xE6': 'ae',
+    '\xDE': 'Th', '\xFE': 'th',
+    '\xDF': 'ss'
+  };
+
   /**
    * Used to map characters to HTML entities.
    *
@@ -239,25 +254,11 @@
     '&#96;': '`'
   };
 
-  /** Used to map latin-1 supplementary letters to basic latin letters */
-  var deburredLetters = {
-    '\xC0': 'A',  '\xC1': 'A', '\xC2': 'A', '\xC3': 'A', '\xC4': 'A', '\xC5': 'A',
-    '\xE0': 'a',  '\xE1': 'a', '\xE2': 'a', '\xE3': 'a', '\xE4': 'a', '\xE5': 'a',
-    '\xC7': 'C',  '\xE7': 'c',
-    '\xD0': 'D',  '\xF0': 'd',
-    '\xC8': 'E',  '\xC9': 'E', '\xCA': 'E', '\xCB': 'E',
-    '\xE8': 'e',  '\xE9': 'e', '\xEA': 'e', '\xEB': 'e',
-    '\xCC': 'I',  '\xCD': 'I', '\xCE': 'I', '\xCF': 'I',
-    '\xEC': 'i',  '\xED': 'i', '\xEE': 'i', '\xEF': 'i',
-    '\xD1': 'N',  '\xF1': 'n',
-    '\xD2': 'O',  '\xD3': 'O', '\xD4': 'O', '\xD5': 'O', '\xD6': 'O', '\xD8': 'O',
-    '\xF2': 'o',  '\xF3': 'o', '\xF4': 'o', '\xF5': 'o', '\xF6': 'o', '\xF8': 'o',
-    '\xD9': 'U',  '\xDA': 'U', '\xDB': 'U', '\xDC': 'U',
-    '\xF9': 'u',  '\xFA': 'u', '\xFB': 'u', '\xFC': 'u',
-    '\xDD': 'Y',  '\xFD': 'y', '\xFF': 'y',
-    '\xC6': 'Ae', '\xE6': 'ae',
-    '\xDE': 'Th', '\xFE': 'th',
-    '\xDF': 'ss'
+  /** Used to map iteratee types to lazy methods */
+  var lazyIterateeTypes = {
+    'filter': LAZY_FILTER_FLAG,
+    'map': LAZY_MAP_FLAG,
+    'takeWhile': LAZY_WHILE_FLAG
   };
 
   /** Used to determine if values are of the language type `Object` */
@@ -359,26 +360,6 @@
     return true;
   }
 
-  /**
-   * A specialized version of `_.map` for arrays without support for callback
-   * shorthands or `this` binding.
-   *
-   * @private
-   * @param {Array} array The array to iterate over.
-   * @param {Function} iteratee The function invoked per iteration.
-   * @returns {Array} Returns the new mapped array.
-   */
-  function arrayMap(array, iteratee) {
-    var index = -1,
-        length = array.length,
-        result = Array(length);
-
-    while (++index < length) {
-      result[index] = iteratee(array[index], index, array);
-    }
-    return result;
-  }
-
   /**
    * A specialized version of `_.filter` for arrays without support for callback
    * shorthands or `this` binding.
@@ -403,6 +384,26 @@
     return result;
   }
 
+  /**
+   * A specialized version of `_.map` for arrays without support for callback
+   * shorthands or `this` binding.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   */
+  function arrayMap(array, iteratee) {
+    var index = -1,
+        length = array.length,
+        result = Array(length);
+
+    while (++index < length) {
+      result[index] = iteratee(array[index], index, array);
+    }
+    return result;
+  }
+
   /**
    * A specialized version of `_.reduce` for arrays without support for callback
    * shorthands or `this` binding.
@@ -664,7 +665,7 @@
   }
 
   /**
-   * Used by `deburr` to convert latin-1 to basic latin letters.
+   * Used by `_.deburr` to convert latin-1 to basic latin letters.
    *
    * @private
    * @param {string} letter The matched letter to deburr.
@@ -758,7 +759,7 @@
   }
 
   /**
-   * Used by `_.trimmedLeftIndex` and `_.trimmedRightIndex` to determine if a
+   * Used by `trimmedLeftIndex` and `trimmedRightIndex` to determine if a
    * character code is whitespace.
    *
    * @private
@@ -979,13 +980,28 @@
         nativeParseInt = context.parseInt,
         nativeRandom = Math.random;
 
+    /** Used as references for `-Infinity` and `Infinity` */
+    var NEGATIVE_INFINITY = Number.NEGATIVE_INFINITY,
+        POSITIVE_INFINITY = Number.POSITIVE_INFINITY;
+
+    /** Used as references for the max length and index of an array */
+    var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
+        MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
+
     /** Used as the size, in bytes, of each Float64Array element */
     var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0;
 
+    /**
+     * Used as the maximum length of an array-like value.
+     * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+     * for more details.
+     */
+    var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
+
     /** Used to store function metadata */
     var metaMap = WeakMap && new WeakMap;
 
-    /** Used to lookup a built-in constructor by [[Class]] */
+    /** Used to lookup a built-in constructor by `[[Class]]` */
     var ctorByClass = {};
     ctorByClass[float32Class] = context.Float32Array;
     ctorByClass[float64Class] = context.Float64Array;
@@ -1085,29 +1101,14 @@
      */
     function lodash(value) {
       if (value && typeof value == 'object') {
-        if (value instanceof lodashWrapper) {
+        if (value instanceof LodashWrapper) {
           return value;
         }
         if (!isArray(value) && hasOwnProperty.call(value, '__wrapped__')) {
-          return new lodashWrapper(value.__wrapped__, value.__chain__, baseSlice(value.__queue__));
+          return new LodashWrapper(value.__wrapped__, value.__chain__, baseSlice(value.__queue__));
         }
       }
-      return new lodashWrapper(value);
-    }
-
-    /**
-     * A fast path for creating `lodash` wrapper objects.
-     *
-     * @private
-     * @param {*} value The value to wrap in a `lodash` instance.
-     * @param {boolean} [chainAll=false] Enable chaining for all methods.
-     * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
-     * @returns {Object} Returns a `lodash` instance.
-     */
-    function lodashWrapper(value, chainAll, queue) {
-      this.__chain__ = !!chainAll;
-      this.__queue__ = queue || [];
-      this.__wrapped__ = value;
+      return new LodashWrapper(value);
     }
 
     /**
@@ -1151,7 +1152,7 @@
        *
        * Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
        * (if the prototype or a property on the prototype has been set)
-       * incorrectly sets the `[[Enumerable]]` value of a function's `prototype`
+       * incorrectly set the `[[Enumerable]]` value of a function's `prototype`
        * property to `true`.
        *
        * @memberOf _.support
@@ -1207,8 +1208,7 @@
       support.nonEnumShadows = !/valueOf/.test(props);
 
       /**
-       * Detect if own properties are iterated after inherited properties
-       * (IE < 9).
+       * Detect if own properties are iterated after inherited properties (IE < 9).
        *
        * @memberOf _.support
        * @type boolean
@@ -1336,6 +1336,48 @@
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * A specialized version of `_.max` for arrays without support for iteratees.
+     *
+     * @private
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the maximum value.
+     */
+    function arrayMax(array) {
+      var index = -1,
+          length = array.length,
+          result = NEGATIVE_INFINITY;
+
+      while (++index < length) {
+        var value = array[index];
+        if (value > result) {
+          result = value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * A specialized version of `_.min` for arrays without support for iteratees.
+     *
+     * @private
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the minimum value.
+     */
+    function arrayMin(array) {
+      var index = -1,
+          length = array.length,
+          result = POSITIVE_INFINITY;
+
+      while (++index < length) {
+        var value = array[index];
+        if (value < result) {
+          result = value;
+        }
+      }
+      return result;
+    }
+
     /**
      * Used by `_.defaults` to customize its `_.assign` use.
      *
@@ -1345,9 +1387,7 @@
      * @returns {*} Returns the value to assign to the destination object.
      */
     function assignDefaults(objectValue, sourceValue) {
-      return typeof objectValue == 'undefined'
-        ? sourceValue
-        : objectValue;
+      return typeof objectValue == 'undefined' ? sourceValue : objectValue;
     }
 
     /**
@@ -1369,6 +1409,18 @@
         : objectValue;
     }
 
+    /**
+     * Used by `_.matches` to clone `source` values, letting uncloneable values
+     * passthu instead of returning empty objects.
+     *
+     * @private
+     * @param {*} value The value to clone.
+     * @returns {*} Returns the cloned value.
+     */
+    function clonePassthru(value) {
+      return isCloneable(value) ? undefined : value;
+    }
+
     /**
      * The base implementation of `_.assign` without support for argument juggling,
      * multiple sources, and `this` binding.
@@ -1418,7 +1470,7 @@
      * "_.pluck" and "_.where" style callbacks.
      *
      * @private
-     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [func=_.identity] The value to convert to a callback.
      * @param {*} [thisArg] The `this` binding of the created callback.
      * @param {number} [argCount] The number of arguments the callback accepts.
      * @returns {Function} Returns the new function.
@@ -1432,6 +1484,7 @@
         }
         var data = getData(func);
         if (typeof data == 'undefined') {
+          var support = lodash.support;
           if (support.funcNames) {
             data = !func.name;
           }
@@ -1485,12 +1538,17 @@
      * @param {*} value The value to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
+     * @param {string} [key] The key of `value`.
+     * @param {Object} [object] The object `value` belongs to.
      * @param {Array} [stackA=[]] Tracks traversed source objects.
      * @param {Array} [stackB=[]] Associates clones with source counterparts.
      * @returns {*} Returns the cloned value.
      */
-    function baseClone(value, isDeep, customizer, stackA, stackB) {
-      var result = customizer ? customizer(value) : undefined;
+    function baseClone(value, isDeep, customizer, key, object, stackA, stackB) {
+      var result;
+      if (customizer) {
+        result = object ? customizer(value, key, object) : customizer(value);
+      }
       if (typeof result != 'undefined') {
         return result;
       }
@@ -1500,7 +1558,12 @@
         result = initArrayClone(value, isDeep);
       } else if (isObject(value)) {
         result = initObjectClone(value, isDeep);
-        value = (isDeep && toString.call(result) == objectClass) ? value : result;
+        if (result === null) {
+          isDeep = false;
+          result = {};
+        } else if (isDeep) {
+          isDeep = toString.call(result) == objectClass;
+        }
       }
       if (!isDeep || result === value) {
         return result;
@@ -1521,11 +1584,8 @@
       stackB.push(result);
 
       // recursively populate clone (susceptible to call stack limits)
-      (isArr ? arrayEach : baseForOwn)(value, function(valValue, key) {
-        var valClone = customizer ? customizer(valValue, key) : undefined;
-        result[key] = typeof valClone == 'undefined'
-          ? baseClone(valValue, isDeep, null, stackA, stackB)
-          : valClone;
+      (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
+        result[key] = baseClone(subValue, isDeep, customizer, key, value, stackA, stackB);
       });
       return result;
     }
@@ -1688,8 +1748,8 @@
     }
 
     /**
-     * The base implementation of `_.filter` without support for callback shorthands
-     * or `this` binding.
+     * The base implementation of `_.filter` without support for callback
+     * shorthands or `this` binding.
      *
      * @private
      * @param {Array|Object|string} collection The collection to iterate over.
@@ -1954,7 +2014,7 @@
           return false;
         }
         if (valIsErr || valIsObj) {
-          if (!support.argsClass) {
+          if (!lodash.support.argsClass) {
             valIsArg = isArguments(value);
             othIsArg = isArguments(other);
           }
@@ -2200,6 +2260,7 @@
      * @param {Function} func The function to partially apply arguments to.
      * @param {number} bitmask The bitmask of flags to compose.
      * @param {Array} args The arguments to be partially applied.
+     * @param {Array} holders The `args` placeholder indexes.
      * @param {*} [thisArg] The `this` binding of `func`.
      * @returns {Function} Returns the new partially applied function.
      */
@@ -2490,7 +2551,7 @@
      *
      * @private
      * @param {Array} partialRightArgs The arguments to append to those provided.
-     * @param {Array} partialHolders The `partialRightArgs` placeholder indexes.
+     * @param {Array} partialRightHolders The `partialRightArgs` placeholder indexes.
      * @param {Array|Object} args The provided arguments.
      * @returns {Array} Returns the new array of composed arguments.
      */
@@ -2590,7 +2651,7 @@
      * @private
      * @param {Function} func The function to bind.
      * @param {*} [thisArg] The `this` binding of `func`.
-     * @returns {Function} Returns the new wrapped function.
+     * @returns {Function} Returns the new bound function.
      */
     function createBindWrapper(func, thisArg) {
       var Ctor = createCtorWrapper(func);
@@ -2635,7 +2696,7 @@
             result = '';
 
         while (++index < length) {
-          result = callback(result, array[index], index, words);
+          result = callback(result, array[index], index);
         }
         return result;
       };
@@ -2647,7 +2708,7 @@
      *
      * @private
      * @param {Function} Ctor The constructor to wrap.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createCtorWrapper(Ctor) {
       return function() {
@@ -2673,7 +2734,7 @@
      * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
      * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
      * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createHybridWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
       var isBind = bitmask & BIND_FLAG,
@@ -2811,7 +2872,7 @@
      * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
      * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
      * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
       var isBindKey = bitmask & BIND_KEY_FLAG;
@@ -2926,9 +2987,9 @@
      * Initializes an array clone.
      *
      * @private
-     * @param {*} value The value to clone.
+     * @param {Array} array The array to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
-     * @returns {*} Returns the initialized clone value.
+     * @returns {Array} Returns the initialized array clone.
      */
     function initArrayClone(array, isDeep) {
       var index = -1,
@@ -2952,17 +3013,17 @@
      * Initializes an object clone.
      *
      * @private
-     * @param {*} value The value to clone.
+     * @param {Object} object The object to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
-     * @returns {*} Returns the initialized clone value.
+     * @returns {null|Object} Returns the initialized object clone.
      */
     function initObjectClone(object, isDeep) {
-      var className = toString.call(object);
-      if (!cloneableClasses[className] || isHostObject(object)) {
-        return object;
+      if (!isCloneable(object)) {
+        return null;
       }
       var Ctor = object.constructor,
-          isArgs = className == argsClass || (!support.argsClass && isArguments(object)),
+          className = toString.call(object),
+          isArgs = className == argsClass || (!lodash.support.argsClass && isArguments(object)),
           isObj = className == objectClass;
 
       if (isObj && !(typeof Ctor == 'function' && Ctor instanceof Ctor)) {
@@ -3016,6 +3077,17 @@
         arrayLikeClasses[toString.call(value)]) || false;
     }
 
+    /**
+     * Checks if `value` is cloneable.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is cloneable, else `false`.
+     */
+    function isCloneable(value) {
+      return (value && cloneableClasses[toString.call(value)] && !isHostObject(value)) || false;
+    }
+
     /**
      * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
      *
@@ -3116,7 +3188,7 @@
      */
     function shimIsPlainObject(value) {
       var Ctor,
-          result;
+          support = lodash.support;
 
       // exit early for non `Object` objects
       if (!(value && typeof value == 'object' &&
@@ -3129,8 +3201,9 @@
       // IE < 9 iterates inherited properties before own properties. If the first
       // iterated property is an object's own property then there are no inherited
       // enumerable properties.
+      var result;
       if (support.ownLast) {
-        baseForIn(value, function(value, key, object) {
+        baseForIn(value, function(subValue, key, object) {
           result = hasOwnProperty.call(object, key);
           return false;
         });
@@ -3139,7 +3212,7 @@
       // 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.
-      baseForIn(value, function(value, key) {
+      baseForIn(value, function(subValue, key) {
         result = key;
       });
       return typeof result == 'undefined' || hasOwnProperty.call(value, result);
@@ -3154,21 +3227,22 @@
      * @returns {Array} Returns the array of property names.
      */
     function shimKeys(object) {
-      var keyIndex,
-          index = -1,
-          props = keysIn(object),
+      var props = keysIn(object),
           length = props.length,
           objLength = length && object.length,
-          maxIndex = objLength - 1,
-          result = [];
+          support = lodash.support;
 
       var allowIndexes = typeof objLength == 'number' && objLength > 0 &&
         (isArray(object) || (support.nonEnumStrings && isString(object)) ||
           (support.nonEnumArgs && isArguments(object)));
 
+      var keyIndex,
+          index = -1,
+          result = [];
+
       while (++index < length) {
         var key = props[index];
-        if ((allowIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex <= maxIndex && keyIndex % 1 == 0)) ||
+        if ((allowIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex < objLength && keyIndex % 1 == 0)) ||
             hasOwnProperty.call(object, key)) {
           result.push(key);
         }
@@ -3191,7 +3265,7 @@
       if (!(typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)) {
         return values(value);
       }
-      if (support.unindexedChars && isString(value)) {
+      if (lodash.support.unindexedChars && isString(value)) {
         return value.split('');
       }
       return isObject(value) ? value : Object(value);
@@ -3205,7 +3279,7 @@
      * @returns {Object} Returns the object.
      */
     function toObject(value) {
-      if (support.unindexedChars && isString(value)) {
+      if (lodash.support.unindexedChars && isString(value)) {
         var index = -1,
             length = value.length,
             result = Object(value);
@@ -3286,8 +3360,9 @@
      * Creates an array excluding all values of the provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3393,7 +3468,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -3442,7 +3517,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -3489,7 +3564,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3543,7 +3618,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3651,8 +3726,9 @@
      * it is used as the offset from the end of the collection. If `array` is
      * sorted providing `true` for `fromIndex` performs a faster binary search.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3684,8 +3760,10 @@
       if (typeof fromIndex == 'number') {
         fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
       } else if (fromIndex) {
-        var index = sortedIndex(array, value);
-        return array[index] === value ? index : -1;
+        var index = sortedIndex(array, value),
+            other = array[index];
+
+        return (value === value ? value === other : other !== other) ? index : -1;
       }
       return baseIndexOf(array, value, fromIndex);
     }
@@ -3704,16 +3782,16 @@
      * // => [1, 2]
      */
     function initial(array) {
-      var length = array ? array.length : 0;
-      return slice(array, 0, (length || 1) - 1);
+      return dropRight(array, 1);
     }
 
     /**
      * Creates an array of unique values present in all provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3822,7 +3900,8 @@
         index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1;
       } else if (fromIndex) {
         index = sortedLastIndex(array, value) - 1;
-        return array[index] === value ? index : -1;
+        var other = array[index];
+        return (value === value ? value === other : other !== other) ? index : -1;
       }
       if (value !== value) {
         return indexOfNaN(array, index, true);
@@ -3841,8 +3920,9 @@
      *
      * **Notes:**
      *  - Unlike `_.without`, this method mutates `array`.
-     *  - `SameValueZero` is like strict equality, e.g. `===`, except that `NaN` matches `NaN`.
-     *    See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     *  - `SameValueZero` comparisons are like strict equality comparisons,
+     *    e.g. `===`, except that `NaN` matches `NaN`. See the
+     *    [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      *    for more details.
      *
      * @static
@@ -3925,7 +4005,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to modify.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3973,7 +4053,7 @@
      * // => [2, 3]
      */
     function rest(array) {
-      return slice(array, 1);
+      return drop(array, 1);
     }
 
     /**
@@ -4038,7 +4118,7 @@
      * @category Array
      * @param {Array} array The array to inspect.
      * @param {*} value The value to evaluate.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4079,7 +4159,7 @@
      * @category Array
      * @param {Array} array The array to inspect.
      * @param {*} value The value to evaluate.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4174,7 +4254,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -4223,7 +4303,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -4259,8 +4339,9 @@
      * Creates an array of unique values, in order, of the provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4292,8 +4373,9 @@
      * returns `true` for elements that have the properties of the given object,
      * else `false`.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4376,8 +4458,9 @@
      * Creates an array excluding all provided values using `SameValueZero` for
      * equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4463,25 +4546,25 @@
      * @alias object
      * @category Array
      * @param {Array} props The property names.
-     * @param {Array} [vals=[]] The property values.
+     * @param {Array} [values=[]] The property values.
      * @returns {Object} Returns the new object.
      * @example
      *
      * _.zipObject(['fred', 'barney'], [30, 40]);
      * // => { 'fred': 30, 'barney': 40 }
      */
-    function zipObject(props, vals) {
+    function zipObject(props, values) {
       var index = -1,
           length = props ? props.length : 0,
           result = {};
 
-      if (!vals && length && !isArray(props[0])) {
-        vals = [];
+      if (!values && length && !isArray(props[0])) {
+        values = [];
       }
       while (++index < length) {
         var key = props[index];
-        if (vals) {
-          result[key] = vals[index];
+        if (values) {
+          result[key] = values[index];
         } else if (key) {
           result[key[0]] = key[1];
         }
@@ -4499,7 +4582,7 @@
      * @memberOf _
      * @category Chain
      * @param {*} value The value to wrap.
-     * @returns {Object} Returns the new wrapper object.
+     * @returns {Object} Returns the new `LodashWrapper` object.
      * @example
      *
      * var users = [
@@ -4569,13 +4652,30 @@
       return interceptor.call(thisArg, value);
     }
 
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * A fast path for creating `lodash` wrapper objects.
+     *
+     * @private
+     * @param {*} value The value to wrap.
+     * @param {boolean} [chainAll=false] Enable chaining for all methods.
+     * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
+     * @returns {Object} Returns a `LodashWrapper` instance.
+     */
+    function LodashWrapper(value, chainAll, queue) {
+      this.__chain__ = !!chainAll;
+      this.__queue__ = queue || [];
+      this.__wrapped__ = value;
+    }
+
     /**
      * Enables explicit method chaining on the wrapper object.
      *
      * @name chain
      * @memberOf _
      * @category Chain
-     * @returns {*} Returns the wrapper object.
+     * @returns {*} Returns the `LodashWrapper` object.
      * @example
      *
      * var users = [
@@ -4598,6 +4698,32 @@
       return chain(this);
     }
 
+    /**
+     * Reverses the wrapped array so the first element becomes the last, the
+     * second element becomes the second to last, and so on.
+     *
+     * **Note:** This method mutates the wrapped array.
+     *
+     * @name chain
+     * @memberOf _
+     * @category Chain
+     * @returns {Object} Returns the new reversed `LodashWrapper` object.
+     * @example
+     *
+     * var array = [1, 2, 3];
+     *
+     * _(array).reverse().value()
+     * // => [3, 2, 1]
+     *
+     * console.log(array);
+     * // => [3, 2, 1]
+     */
+    function wrapperReverse() {
+      return this.thru(function(value) {
+        return value.reverse();
+      });
+    }
+
     /**
      * Produces the result of coercing the unwrapped value to a string.
      *
@@ -4628,24 +4754,152 @@
      * // => [1, 2, 3]
      */
     function wrapperValueOf() {
+      var result = this.__wrapped__;
+      if (result instanceof LazyWrapper) {
+        result = result.value();
+      }
       var index = -1,
           queue = this.__queue__,
-          length = queue.length,
-          result = this.__wrapped__;
+          length = queue.length;
 
       while (++index < length) {
         var args = [result],
             data = queue[index],
-            object = data[1];
+            object = data.object;
 
-        push.apply(args, data[2]);
-        result = object[data[0]].apply(object, args);
+        push.apply(args, data.args);
+        result = object[data.name].apply(object, args);
       }
       return result;
     }
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * Wraps `value` as a `LazyWrapper` object.
+     *
+     * @private
+     * @param {*} value The value to wrap.
+     * @returns {Object} Returns a `LazyWrapper` instance.
+     */
+    function LazyWrapper(value) {
+      this.dir = 1;
+      this.dropCount = 0;
+      this.filtered = false;
+      this.iteratees = [];
+      this.takeCount = POSITIVE_INFINITY;
+      this.views = [];
+      this.wrapped = value;
+    }
+
+    /**
+     * Creates a clone of the `LazyWrapper` object.
+     *
+     * @private
+     * @name clone
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the cloned `LazyWrapper` object.
+     */
+    function lazyClone() {
+      var result = new LazyWrapper(this.wrapped);
+      result.dir = this.dir;
+      result.dropCount = this.dropCount;
+      result.filtered = this.filtered;
+      result.takeCount = this.takeCount;
+      push.apply(result.iteratees, this.iteratees);
+      push.apply(result.views, this.views);
+      return result;
+    }
+
+    /**
+     * Reverses the direction of lazy iteration.
+     *
+     * @private
+     * @name reverse
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the new reversed `LazyWrapper` object.
+     */
+    function lazyReverse() {
+      var filtered = this.filtered,
+          result = filtered ? new LazyWrapper(this) : this.clone();
+
+      result.dir = this.dir * -1;
+      result.filtered = filtered;
+      return result;
+    }
+
+    /**
+     * Extracts the unwrapped value from its wrapper.
+     *
+     * @private
+     * @name value
+     * @memberOf LazyWrapper
+     * @returns {*} Returns the unwrapped value.
+     */
+    function lazyValue() {
+      var array = this.wrapped.value(),
+          length = array.length,
+          start = 0,
+          end = length,
+          views = this.views,
+          viewIndex = -1,
+          viewsLength = views.length;
+
+      while (++viewIndex < viewsLength) {
+        var view = views[viewIndex],
+            size = view.size;
+
+        switch (view.type) {
+          case 'drop':      start += size; break;
+          case 'dropRight': end -= size; break;
+          case 'take':      end = nativeMin(end, start + size); break;
+          case 'takeRight': start = nativeMax(start, end - size); break;
+        }
+      }
+      var dir = this.dir,
+          dropCount = this.dropCount,
+          droppedCount = 0,
+          doneDropping = !dropCount,
+          takeCount = nativeMin(end - start, this.takeCount - dropCount),
+          isRight = dir < 0,
+          index = isRight ? end : start - 1,
+          iteratees = this.iteratees,
+          iterateesLength = iteratees.length,
+          resIndex = 0,
+          result = [];
+
+      outer:
+      while (length-- && resIndex < takeCount) {
+        var iterateesIndex = -1,
+            value = array[index += dir];
+
+        while (++iterateesIndex < iterateesLength) {
+          var data = iteratees[iterateesIndex],
+              iteratee = data.iteratee,
+              computed = iteratee(value, index, array),
+              type = data.type;
+
+          if (type == LAZY_MAP_FLAG) {
+            value = computed;
+          } else if (!computed) {
+            if (type == LAZY_FILTER_FLAG) {
+              continue outer;
+            } else {
+              break outer;
+            }
+          }
+        }
+        if (doneDropping) {
+          result[resIndex++] = value;
+        } else {
+          doneDropping = ++droppedCount >= dropCount;
+        }
+      }
+      return isRight ? result.reverse() : result;
+    }
+
+    /*------------------------------------------------------------------------*/
+
     /**
      * Creates an array of elements corresponding to the specified keys, or indexes,
      * of the collection. Keys may be specified as individual arguments or as arrays
@@ -4676,12 +4930,13 @@
     }
 
     /**
-     * Checks if `value` is present in `collection` using  `SameValueZero` for
+     * Checks if `value` is present in `collection` using `SameValueZero` for
      * equality comparisons. If `fromIndex` is negative, it is used as the offset
      * from the end of the collection.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4744,7 +4999,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4781,7 +5036,7 @@
      * @alias all
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4830,7 +5085,7 @@
      * @alias select
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4877,7 +5132,7 @@
      * @alias detect
      * @category Collection
      * @param {Array|Object|string} collection The collection to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4920,7 +5175,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4978,7 +5233,7 @@
      * @alias each
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array|Object|string} Returns `collection`.
      * @example
@@ -5004,7 +5259,7 @@
      * @alias eachRight
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array|Object|string} Returns `collection`.
      * @example
@@ -5036,7 +5291,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5079,7 +5334,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5147,7 +5402,7 @@
      * @alias collect
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5220,38 +5475,30 @@
      * // => { 'user': 'fred', 'age': 40 };
      */
     function max(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-      var computed = -Infinity,
-          noIteratee = iteratee == null,
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
+      var noIteratee = iteratee == null,
           isArr = noIteratee && isArray(collection),
-          isStr = !isArr && isString(collection),
-          result = computed;
+          isStr = !isArr && isString(collection);
 
       if (noIteratee && !isStr) {
-        var index = -1,
-            iterable = toIterable(collection),
-            length = iterable.length;
-
-        while (++index < length) {
-          var value = iterable[index];
-          if (value > result) {
-            result = value;
-          }
-        }
-      } else {
-        iteratee = (noIteratee && isStr)
-          ? charAtCallback
-          : getCallback(iteratee, thisArg, 3);
-
-        baseEach(collection, function(value, index, collection) {
-          var current = iteratee(value, index, collection);
-          if (current > computed || (current === -Infinity && current === result)) {
-            computed = current;
-            result = value;
-          }
-        });
+        return arrayMax(isArr ? collection : toIterable(collection));
       }
+      var computed = NEGATIVE_INFINITY,
+          result = computed;
+
+      iteratee = (noIteratee && isStr)
+        ? charAtCallback
+        : getCallback(iteratee, thisArg, 3);
+
+      baseEach(collection, function(value, index, collection) {
+        var current = iteratee(value, index, collection);
+        if (current > computed || (current === NEGATIVE_INFINITY && current === result)) {
+          computed = current;
+          result = value;
+        }
+      });
       return result;
     }
 
@@ -5299,38 +5546,30 @@
      * // => { 'user': 'barney', 'age': 36 };
      */
     function min(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-      var computed = Infinity,
-          noIteratee = iteratee == null,
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
+      var noIteratee = iteratee == null,
           isArr = noIteratee && isArray(collection),
-          isStr = !isArr && isString(collection),
-          result = computed;
+          isStr = !isArr && isString(collection);
 
       if (noIteratee && !isStr) {
-        var index = -1,
-            iterable = toIterable(collection),
-            length = iterable.length;
-
-        while (++index < length) {
-          var value = iterable[index];
-          if (value < result) {
-            result = value;
-          }
-        }
-      } else {
-        iteratee = (noIteratee && isStr)
-          ? charAtCallback
-          : getCallback(iteratee, thisArg, 3);
-
-        baseEach(collection, function(value, index, collection) {
-          var current = iteratee(value, index, collection);
-          if (current < computed || (current === Infinity && current === result)) {
-            computed = current;
-            result = value;
-          }
-        });
+        return arrayMin(isArr ? collection : toIterable(collection));
       }
+      var computed = POSITIVE_INFINITY,
+          result = computed;
+
+      iteratee = (noIteratee && isStr)
+        ? charAtCallback
+        : getCallback(iteratee, thisArg, 3);
+
+      baseEach(collection, function(value, index, collection) {
+        var current = iteratee(value, index, collection);
+        if (current < computed || (current === POSITIVE_INFINITY && current === result)) {
+          computed = current;
+          result = value;
+        }
+      });
       return result;
     }
 
@@ -5351,7 +5590,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5422,7 +5661,7 @@
      * @alias foldl, inject
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The initial value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -5451,7 +5690,7 @@
      * @alias foldr
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The initial value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -5481,7 +5720,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5619,7 +5858,7 @@
      * @alias any
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5672,7 +5911,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Array|Function|Object|string} [iteratee=identity] The function
+     * @param {Array|Function|Object|string} [iteratee=_.identity] The function
      *  invoked per iteration. If property name(s) or an object is provided it
      *  is used to create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5701,8 +5940,9 @@
      * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
      */
     function sortBy(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
       var index = -1,
           length = collection ? collection.length : 0,
           multi = iteratee && isArray(iteratee),
@@ -5752,7 +5992,7 @@
     function toArray(collection) {
       var length = collection ? collection.length : 0;
       if (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) {
-        return (support.unindexedChars && isString(collection))
+        return (lodash.support.unindexedChars && isString(collection))
           ? collection.split('')
           : baseSlice(collection);
       }
@@ -6373,9 +6613,16 @@
      * Creates a function that memoizes the result of `func`. If `resolver` is
      * provided it determines the cache key for storing the result based on the
      * arguments provided to the memoized function. By default, the first argument
-     * provided to the memoized function is used as the cache key. The `func` is
-     * invoked with the `this` binding of the memoized function. The result cache
-     * is exposed as the `cache` property on the memoized function.
+     * provided to the memoized function is coerced to a string and used as the
+     * cache key. The `func` is invoked with the `this` binding of the memoized
+     * function.
+     *
+     * **Note:** The cache is exposed as the `cache` property on the memoized
+     * function. Its creation may be customized by replacing the `_.memoize.Cache`
+     * constructor with one whose instances implement the ES6 `Map` method interface
+     * of `get`, `has`, and `set`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-properties-of-the-map-prototype-object)
+     * for more details.
      *
      * @static
      * @memberOf _
@@ -6400,7 +6647,7 @@
      * upperCase('fred');
      * // => 'FRED'
      *
-     * upperCase.cache.fred = 'BARNEY'
+     * upperCase.cache.set('fred, 'BARNEY');
      * upperCase('fred');
      * // => 'BARNEY'
      */
@@ -6409,16 +6656,17 @@
         throw new TypeError(FUNC_ERROR_TEXT);
       }
       var memoized = function() {
-        var key = resolver ? resolver.apply(this, arguments) : arguments[0];
-        if (key == '__proto__') {
-          return func.apply(this, arguments);
+        var cache = memoized.cache,
+            key = resolver ? resolver.apply(this, arguments) : arguments[0];
+
+        if (cache.has(key)) {
+          return cache.get(key);
         }
-        var cache = memoized.cache;
-        return hasOwnProperty.call(cache, key)
-          ? cache[key]
-          : (cache[key] = func.apply(this, arguments));
+        var result = func.apply(this, arguments);
+        cache.set(key, result);
+        return result;
       };
-      memoized.cache = {};
+      memoized.cache = new memoize.Cache;
       return memoized;
     }
 
@@ -6468,7 +6716,7 @@
      * initialize();
      * // `initialize` invokes `createApplication` once
      */
-    var once = partial(before, 2);
+    var once = basePartial(before,PARTIAL_FLAG, [2], []);
 
     /**
      * Creates a function that invokes `func` with `partial` arguments prepended
@@ -6620,6 +6868,63 @@
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * Creates the cache used by `_.memoize`.
+     *
+     * @private
+     * @static
+     * @name Cache
+     * @memberOf _.memoize
+     */
+    function MemCache() {
+      this.__wrapped__ = {};
+    }
+
+    /**
+     * Gets the value associated with `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The key of the value to retrieve.
+     * @returns {*} Returns the cached value.
+     */
+    function memGet(key) {
+      return this.__wrapped__[key];
+    }
+
+    /**
+     * Checks if an entry for `key` exists.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The name of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function memHas(key) {
+      return key != '__proto__' && hasOwnProperty.call(this.__wrapped__, key);
+    }
+
+    /**
+     * Sets the value associated with `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the cache object.
+     */
+    function memSet(key, value) {
+      if (key != '__proto__') {
+        this.__wrapped__[key] = value;
+      }
+      return this;
+    }
+
+    /*------------------------------------------------------------------------*/
+
     /**
      * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
      * otherwise they are assigned by reference. If `customizer` is provided it is
@@ -6627,10 +6932,11 @@
      * cloning is handled by the method instead. The `customizer` is bound to
      * `thisArg` and invoked with two argument; (value, index|key).
      *
-     * **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 the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+     * **Note:** This method is loosely based on the structured clone algorithm.
+     * The enumerable properties of `arguments` objects and objects created by
+     * constructors other than `Object` are cloned to plain `Object` objects. An
+     * empty object is returned for uncloneable values such as functions, DOM nodes,
+     * Maps, Sets, and WeakMaps. See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
      * for more details.
      *
      * @static
@@ -6683,10 +6989,11 @@
      * is handled by the method instead. The `customizer` is bound to `thisArg`
      * and invoked with two argument; (value, index|key).
      *
-     * **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 the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+     * **Note:** This method is loosely based on the structured clone algorithm.
+     * The enumerable properties of `arguments` objects and objects created by
+     * constructors other than `Object` are cloned to plain `Object` objects. An
+     * empty object is returned for uncloneable values such as functions, DOM nodes,
+     * Maps, Sets, and WeakMaps. See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
      * for more details.
      *
      * @static
@@ -6731,7 +7038,7 @@
      * @memberOf _
      * @category Lang
      * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
      * @example
      *
      * (function() { return _.isArguments(arguments); })();
@@ -6834,7 +7141,7 @@
      */
     function isElement(value) {
       return (value && typeof value == 'object' && value.nodeType === 1 &&
-        (support.nodeClass ? toString.call(value).indexOf('Element') > -1 : isHostObject(value))) || false;
+        (lodash.support.nodeClass ? toString.call(value).indexOf('Element') > -1 : isHostObject(value))) || false;
     }
     // fallback for environments without DOM support
     if (!support.dom) {
@@ -7175,7 +7482,7 @@
      * // => true
      */
     var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
-      if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) {
+      if (!(value && toString.call(value) == objectClass) || (!lodash.support.argsClass && isArguments(value))) {
         return false;
       }
       var valueOf = value.valueOf,
@@ -7360,7 +7667,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -7406,7 +7713,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -7447,7 +7754,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7479,7 +7786,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7511,7 +7818,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7536,7 +7843,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7579,7 +7886,7 @@
      * @category Object
      * @param {Object} object The object to inspect.
      * @param {string} key The name of the property to check.
-     * @returns {boolean} Returns `true` if key is a direct property, else `false`.
+     * @returns {boolean} Returns `true` if `key` is a direct property, else `false`.
      * @example
      *
      * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
@@ -7668,7 +7975,7 @@
       }
       if ((typeof Ctor == 'function' && Ctor.prototype === object) ||
           (typeof length == 'number' && length > 0) ||
-          (support.enumPrototypes && typeof object == 'function')) {
+          (lodash.support.enumPrototypes && typeof object == 'function')) {
         return shimKeys(object);
       }
       return isObject(object) ? nativeKeys(object) : [];
@@ -7701,7 +8008,9 @@
       if (!isObject(object)) {
         object = Object(object);
       }
-      var length = object.length;
+      var length = object.length,
+          support = lodash.support;
+
       length = (typeof length == 'number' && length > 0 &&
         (isArray(object) || (support.nonEnumStrings && isString(object)) ||
           (support.nonEnumArgs && isArguments(object))) && length) || 0;
@@ -7710,7 +8019,6 @@
           Ctor = object.constructor,
           index = -1,
           isProto = typeof Ctor == 'function' && Ctor.prototype === object,
-          maxIndex = length - 1,
           result = Array(length),
           skipIndexes = length > 0,
           skipErrorProps = support.enumErrorProps && (object === errorProto || object instanceof Error),
@@ -7727,7 +8035,7 @@
         if (!(isProto && key == 'constructor') &&
             !(skipProto && key == 'prototype') &&
             !(skipErrorProps && (key == 'message' || key == 'name')) &&
-            !(skipIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex <= maxIndex && keyIndex % 1 == 0))) {
+            !(skipIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex < length && keyIndex % 1 == 0))) {
           result.push(key);
         }
       }
@@ -7766,7 +8074,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -7958,7 +8266,7 @@
      * @memberOf _
      * @category Object
      * @param {Array|Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The custom accumulator value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -8100,7 +8408,7 @@
      * @memberOf _
      * @category String
      * @param {string} [string=''] The string to deburr.
-     * @returns {string} Returns the beburred string.
+     * @returns {string} Returns the deburred string.
      * @example
      *
      * _.deburr('déjà vu');
@@ -8509,7 +8817,7 @@
       // https://github.com/olado/doT
       var settings = lodash.templateSettings;
 
-      if (isIterateeCall(string, options, otherOptions)) {
+      if (otherOptions && isIterateeCall(string, options, otherOptions)) {
         options = otherOptions = null;
       }
       string = String(string == null ? '' : string);
@@ -8535,8 +8843,8 @@
 
       // use a sourceURL for easier debugging
       // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
-      var sourceURL = options.sourceURL || ('/lodash/template/source[' + (++templateCounter) + ']');
-      sourceURL = sourceURL ? ('\n/*\n//# sourceURL=' + sourceURL + '\n*/') : '';
+      var sourceURL = 'sourceURL' in options ? options.sourceURL : ('/lodash/template/source[' + (++templateCounter) + ']');
+      sourceURL = sourceURL ? ('\n//# sourceURL=' + sourceURL) : '';
 
       string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
         interpolateValue || (interpolateValue = esTemplateValue);
@@ -8869,7 +9177,7 @@
      * @memberOf _
      * @alias iteratee
      * @category Utility
-     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [func=_.identity] The value to convert to a callback.
      * @param {*} [thisArg] The `this` binding of the created callback.
      * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
      * @returns {Function} Returns the new function.
@@ -8977,15 +9285,15 @@
         }
       }
       var index = length,
-          flags = Array(length),
-          vals = Array(length);
+          values = Array(length),
+          strictCompareFlags = Array(length);
 
       while (index--) {
         value = source[props[index]];
         var isStrict = isStrictComparable(value);
 
-        flags[index] = isStrict;
-        vals[index] = isStrict ? value : baseClone(value);
+        values[index] = isStrict ? value : baseClone(value, true, clonePassthru);
+        strictCompareFlags[index] = isStrict;
       }
       return function(object) {
         index = length;
@@ -8993,13 +9301,19 @@
           return !index;
         }
         while (index--) {
-          if (flags[index] ? vals[index] !== object[props[index]] : !hasOwnProperty.call(object, props[index])) {
+          if (strictCompareFlags[index]
+                ? values[index] !== object[props[index]]
+                : !hasOwnProperty.call(object, props[index])
+              ) {
             return false;
           }
         }
         index = length;
         while (index--) {
-          if (flags[index] ? !hasOwnProperty.call(object, props[index]) : !baseIsEqual(vals[index], object[props[index]], null, true)) {
+          if (strictCompareFlags[index]
+                ? !hasOwnProperty.call(object, props[index])
+                : !baseIsEqual(values[index], object[props[index]], null, true)
+              ) {
             return false;
           }
         }
@@ -9071,10 +9385,11 @@
         if (isFunc) {
           object.prototype[methodName] = (function(methodName) {
             return function() {
-              if (chain || this.__chain__) {
+              var chainAll = this.__chain__;
+              if (chain || chainAll) {
                 var result = object(this.__wrapped__);
-                result.__chain__ = this.__chain__;
-                (result.__queue__ = baseSlice(this.__queue__)).push([methodName, object, arguments]);
+                result.__chain__ = chainAll;
+                (result.__queue__ = baseSlice(this.__queue__)).push({ 'args': arguments, 'object': object, 'name': methodName });
                 return result;
               }
               var args = [this.value()];
@@ -9265,7 +9580,7 @@
 
     /**
      * Creates an array of numbers (positive and/or negative) progressing from
-     * `start` up to but not including `end`. If `start` is less than `stop` a
+     * `start` up to but not including `end`. If `start` is less than `end` a
      * zero-length range is created unless a negative `step` is specified.
      *
      * @static
@@ -9371,7 +9686,7 @@
      * @memberOf _
      * @category Utility
      * @param {number} n The number of times to invoke `iteratee`.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array} Returns the array of results.
      * @example
@@ -9425,6 +9740,17 @@
 
     /*------------------------------------------------------------------------*/
 
+    // ensure `new LodashWrapper` is an instance of `lodash`
+    LodashWrapper.prototype = lodash.prototype;
+
+    // add functions to the memoize cache
+    MemCache.prototype.get = memGet;
+    MemCache.prototype.has = memHas;
+    MemCache.prototype.set = memSet;
+
+    // assign cache to `_.memoize`
+    memoize.Cache = MemCache;
+
     // add functions that return wrapped values when chaining
     lodash.after = after;
     lodash.assign = assign;
@@ -9658,25 +9984,143 @@
      */
     lodash.VERSION = VERSION;
 
-    // ensure `new lodashWrapper` is an instance of `lodash`
-    lodashWrapper.prototype = lodash.prototype;
-
-    // add "Chaining" functions to the wrapper
-    lodash.prototype.chain = wrapperChain;
-    lodash.prototype.toString = wrapperToString;
-    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
-
     // assign default placeholders
     arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
       lodash[methodName].placeholder = lodash;
     });
 
-    // add `Array.prototype` functions
-    arrayEach(['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
+    // add `LazyWrapper` methods that accept an `iteratee` value
+    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
+      var isFilter = !index;
+
+      LazyWrapper.prototype[methodName] = function(iteratee, thisArg) {
+        iteratee = getCallback(iteratee, thisArg, 3);
+
+        var result = this.clone();
+        result.filtered = isFilter || result.filtered;
+        result.iteratees.push({ 'iteratee': iteratee, 'type': lazyIterateeTypes[methodName] });
+        return result;
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.drop` and `_.take` variants
+    arrayEach(['drop', 'take'], function(methodName) {
+      var countName = methodName + 'Count',
+          whileName = methodName + 'While';
+
+      LazyWrapper.prototype[methodName] = function(n) {
+        n = n == null ? 1 : nativeMax(+n || 0, 0);
+
+        var result = this.clone();
+        if (this.filtered) {
+          result[countName] = n;
+          return result;
+        }
+        result.views.push({
+          'size': n,
+          'type': methodName + (result.dir < 0 ? 'Right' : '')
+        });
+        return result;
+      };
+
+      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
+        return this.reverse()[methodName](n).reverse();
+      };
+
+      LazyWrapper.prototype[methodName + 'RightWhile'] = function(predicate, thisArg) {
+        var result = this.reverse()[whileName](predicate, thisArg);
+        result.filtered = true;
+        return result.reverse();
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.first` and `_.last`
+    arrayEach(['first', 'last'], function(methodName, index) {
+      var takeName = 'take' + (index ? 'Right': '');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this[takeName](1).value()[0];
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.initial` and `_.rest`
+    arrayEach(['initial', 'rest'], function(methodName, index) {
+      var dropName = 'drop' + (index ? '' : 'Right');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this[dropName](1);
+      };
+    });
+
+    LazyWrapper.prototype.dropWhile = function(iteratee, thisArg) {
+      iteratee = getCallback(iteratee, thisArg, 3);
+
+      var done,
+          lastIndex,
+          isRight = this.dir < 0;
+
+      return this.filter(function(value, index, array) {
+        done = done && (isRight ? index < lastIndex : index > lastIndex);
+        lastIndex = index;
+        return done || (done = !iteratee(value, index, array));
+      });
+    };
+
+    LazyWrapper.prototype.reject = function(iteratee, thisArg) {
+      iteratee = getCallback(iteratee, thisArg, 3);
+
+      return this.filter(function(value, index, array) {
+        return !iteratee(value, index, array);
+      });
+    };
+
+    LazyWrapper.prototype.slice = function(start, end) {
+      start = start == null ? 0 : (+start || 0);
+      var result = start < 0 ? this.takeRight(-start) : this.drop(start);
+
+      if (typeof end != 'undefined') {
+        end = (+end || 0);
+        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+      }
+      return result;
+    };
+
+    // add `LazyWrapper` methods to `LodashWrapper`
+    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
+      var retUnwrapped = /^(?:first|last)$/.test(methodName);
+
+      lodash.prototype[methodName] = function() {
+        var args = arguments,
+            chainAll = this.__chain__,
+            value = this.__wrapped__,
+            isLazy = value instanceof LazyWrapper;
+
+        if (retUnwrapped && !chainAll) {
+          if (isLazy) {
+            return func.apply(value, args);
+          }
+          var otherArgs = [this.value()];
+          push.apply(otherArgs, args);
+          return lodash[methodName].apply(lodash, otherArgs);
+        }
+        if (isLazy || isArray(value)) {
+          var result = func.apply(isLazy ? value : new LazyWrapper(this), args);
+          return new LodashWrapper(result, chainAll);
+        }
+        return this.thru(function(value) {
+          var otherArgs = [value];
+          push.apply(otherArgs, args);
+          return lodash[methodName].apply(lodash, otherArgs);
+        });
+      };
+    });
+
+    // add `Array.prototype` functions to `LodashWrapper`
+    arrayEach(['concat', 'join', 'pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
       var arrayFunc = arrayProto[methodName],
-          retUnwrapped = /^(?:join|pop|shift)$/.test(methodName),
-          chainName = /^(?:push|reverse|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
-          fixObjects = !support.spliceObjects && /^(?:pop|shift|splice)$/.test(methodName);
+          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+          fixObjects = !support.spliceObjects && /^(?:pop|shift|splice)$/.test(methodName),
+          retUnwrapped = /^(?:join|pop|shift)$/.test(methodName);
 
       // avoid array-like object bugs with `Array#shift` and `Array#splice` in
       // IE < 9, Firefox < 10, Narwhal, and RingoJS
@@ -9699,6 +10143,23 @@
       };
     });
 
+    // add functions to the lazy wrapper
+    LazyWrapper.prototype.clone = lazyClone;
+    LazyWrapper.prototype.reverse = lazyReverse;
+    LazyWrapper.prototype.value = lazyValue;
+
+    // add chaining functions to the lodash wrapper
+    lodash.prototype.chain = wrapperChain;
+    lodash.prototype.reverse = wrapperReverse;
+    lodash.prototype.toString = wrapperToString;
+    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
+
+    // add function aliases to the lodash wrapper
+    lodash.prototype.collect = lodash.prototype.map;
+    lodash.prototype.head = lodash.prototype.first;
+    lodash.prototype.select = lodash.prototype.filter;
+    lodash.prototype.tail = lodash.prototype.rest;
+
     return lodash;
   }
 
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index 802f0e7ca..5099529ac 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -3,75 +3,82 @@
  * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.7.0 underscorejs.org/LICENSE
  * Build: `lodash -o ./dist/lodash.compat.js`
  */
-;(function(){function n(n,t){for(var r=-1,e=n.length;++r<e&&false!==t(n[r],r,n););return n}function t(n,t){for(var r=-1,e=n.length;++r<e;)if(!t(n[r],r,n))return false;return true}function r(n,t){for(var r=-1,e=n.length,u=Array(e);++r<e;)u[r]=t(n[r],r,n);return u}function e(n,t){for(var r=-1,e=n.length,u=-1,o=[];++r<e;){var i=n[r];t(i,r,n)&&(o[++u]=i)}return o}function u(n,t,r,e){var u=-1,o=n.length;for(e&&o&&(r=n[++u]);++u<o;)r=t(r,n[u],u,n);return r}function o(n,t,r,e){var u=n.length;for(e&&u&&(r=n[--u]);u--;)r=t(r,n[u],u,n);
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+return e.filtered=true,e.reverse()}}),n(["first","last"],function(n,t){var r="take"+(t?"Right":"");ae.prototype[n]=function(){return this[r](1).value()[0]}}),n(["initial","rest"],function(n,t){var r="drop"+(t?"":"Right");ae.prototype[n]=function(){return this[r](1)}}),ae.prototype.dropWhile=function(n,t){n=Tr(n,t,3);var r,e,u=0>this.dir;return this.filter(function(t,o,i){return r=r&&(u?o<e:o>e),e=o,r||(r=!n(t,o,i))})},ae.prototype.reject=function(n,t){return n=Tr(n,t,3),this.filter(function(t,r,e){return!n(t,r,e)
+})},ae.prototype.slice=function(n,t){n=null==n?0:+n||0;var r=0>n?this.takeRight(-n):this.drop(n);return typeof t!="undefined"&&(t=+t||0,r=0>t?r.dropRight(-t):r.take(t-n)),r},fr(ae.prototype,function(n,t){var r=/^(?:first|last)$/.test(t);Ut.prototype[t]=function(){var e=arguments,u=this.__chain__,o=this.__wrapped__,i=o instanceof ae;return r&&!u?i?n.apply(o,e):(u=[this.value()],ku.apply(u,e),Ut[t].apply(Ut,u)):i||po(o)?(o=n.apply(i?o:new ae(this),e),new ie(o,u)):this.thru(function(n){return n=[n],ku.apply(n,e),Ut[t].apply(Ut,n)
+})}}),n("concat join pop push shift sort splice unshift".split(" "),function(n){var t=hu[n],r=/^(?:push|sort|unshift)$/.test(n)?"tap":"thru",e=/^(?:join|pop|shift)$/.test(n),u=ro.spliceObjects||!/^(?:pop|shift|splice)$/.test(n)?t:function(){var n=t.apply(this,arguments);return 0===this.length&&delete this[0],n};Ut.prototype[n]=function(){var n=arguments;return e&&!this.__chain__?u.apply(this.value(),n):this[r](function(t){return u.apply(t,n)})}}),ae.prototype.clone=function(){var n=new ae(this.wrapped);
+return n.dir=this.dir,n.dropCount=this.dropCount,n.filtered=this.filtered,n.takeCount=this.takeCount,ku.apply(n.iteratees,this.iteratees),ku.apply(n.views,this.views),n},ae.prototype.reverse=function(){var n=this.filtered,t=n?new ae(this):this.clone();return t.dir=-1*this.dir,t.filtered=n,t},ae.prototype.value=function(){for(var n=this.wrapped.value(),t=n.length,r=0,e=t,u=this.views,o=-1,i=u.length;++o<i;){var a=u[o],f=a.size;switch(a.type){case"drop":r+=f;break;case"dropRight":e-=f;break;case"take":e=zu(e,r+f);
+break;case"takeRight":r=Pu(r,e-f)}}var u=this.dir,o=this.dropCount,i=0,a=!o,f=zu(e-r,this.takeCount-o),l=0>u,r=l?e:r-1,e=this.iteratees,c=e.length,s=0,p=[];n:for(;t--&&s<f;){for(var h=-1,g=n[r+=u];++h<c;){var v=e[h],y=v.iteratee(g,r,n),v=v.type;if(v==z)g=y;else if(!y){if(v==P)continue n;break n}}a?p[s++]=g:a=++i>=o}return l?p.reverse():p},Ut.prototype.chain=function(){return oe(this)},Ut.prototype.reverse=function(){return this.thru(function(n){return n.reverse()})},Ut.prototype.toString=function(){return su(this.value())
+},Ut.prototype.toJSON=Ut.prototype.value=Ut.prototype.valueOf=function(){var n=this.__wrapped__;n instanceof ae&&(n=n.value());for(var t=-1,r=this.__queue__,e=r.length;++t<e;){var n=[n],u=r[t],o=u.object;ku.apply(n,u.args),n=o[u.name].apply(o,n)}return n},Ut.prototype.collect=Ut.prototype.map,Ut.prototype.head=Ut.prototype.first,Ut.prototype.select=Ut.prototype.filter,Ut.prototype.tail=Ut.prototype.rest,Ut}var O,k="3.0.0-pre",F=1,R=2,S=4,D=8,T=16,W=32,N=64,U=30,L="...",$=150,q=16,P=1,z=2,B="Expected a function",M="__lodash_placeholder__",K=0,V=/\b__p\+='';/g,Y=/\b(__p\+=)''\+/g,Z=/(__e\(.*?\)|\b__t\))\+'';/g,G=/&(?:amp|lt|gt|quot|#39|#96);/g,J=/[&<>"'`]/g,X=/<%-([\s\S]+?)%>/g,H=/<%([\s\S]+?)%>/g,Q=/<%=([\s\S]+?)%>/g,nt=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,tt=/\w*$/,rt=/^\s*function[ \n\r\t]+\w/,et=/^0[xX]/,ut=/^\[object .+?Constructor\]$/,ot=/[\xC0-\xD6\xD8-\xDE\xDF-\xF6\xF8-\xFF]/g,it=/($^)/,at=/[.*+?^${}()|[\]\/\\]/g,ft=/\bthis\b/,lt=/['\n\r\u2028\u2029\\]/g,ct=RegExp("[A-Z\\xC0-\\xD6\\xD8-\\xDE]{2,}(?=[A-Z\\xC0-\\xD6\\xD8-\\xDE][a-z\\xDF-\\xF6\\xF8-\\xFF]+)|[A-Z\\xC0-\\xD6\\xD8-\\xDE]?[a-z\\xDF-\\xF6\\xF8-\\xFF]+|[A-Z\\xC0-\\xD6\\xD8-\\xDE]+|[0-9]+","g"),st=" \t\x0B\f\xa0\ufeff\n\r\u2028\u2029\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000",pt="Array ArrayBuffer Date Error Float32Array Float64Array Function Int8Array Int16Array Int32Array Math Number Object RegExp Set String _ clearTimeout document isFinite parseInt setTimeout TypeError Uint8Array Uint8ClampedArray Uint16Array Uint32Array WeakMap window WinRTError".split(" "),ht="constructor hasOwnProperty isPrototypeOf propertyIsEnumerable toLocaleString toString valueOf".split(" "),gt="[object Arguments]",vt="[object Array]",yt="[object Boolean]",dt="[object Date]",mt="[object Error]",_t="[object Function]",bt="[object Number]",wt="[object Object]",xt="[object RegExp]",jt="[object String]",At="[object ArrayBuffer]",Et="[object Float32Array]",It="[object Float64Array]",Ct="[object Int8Array]",Ot="[object Int16Array]",kt="[object Int32Array]",Ft="[object Uint8Array]",Rt="[object Uint8ClampedArray]",St="[object Uint16Array]",Dt="[object Uint32Array]",Tt={};
+Tt[gt]=Tt[vt]=Tt[Et]=Tt[It]=Tt[Ct]=Tt[Ot]=Tt[kt]=Tt[Ft]=Tt[Rt]=Tt[St]=Tt[Dt]=true,Tt[At]=Tt[yt]=Tt[dt]=Tt[mt]=Tt[_t]=Tt["[object Map]"]=Tt[bt]=Tt[wt]=Tt[xt]=Tt["[object Set]"]=Tt[jt]=Tt["[object WeakMap]"]=false;var Wt={};Wt[gt]=Wt[vt]=Wt[At]=Wt[yt]=Wt[dt]=Wt[Et]=Wt[It]=Wt[Ct]=Wt[Ot]=Wt[kt]=Wt[bt]=Wt[wt]=Wt[xt]=Wt[jt]=Wt[Ft]=Wt[Rt]=Wt[St]=Wt[Dt]=true,Wt[mt]=Wt[_t]=Wt["[object Map]"]=Wt["[object Set]"]=Wt["[object WeakMap]"]=false;var Nt={leading:false,maxWait:0,trailing:false},Ut={"\xc0":"A","\xc1":"A","\xc2":"A","\xc3":"A","\xc4":"A","\xc5":"A","\xe0":"a","\xe1":"a","\xe2":"a","\xe3":"a","\xe4":"a","\xe5":"a","\xc7":"C","\xe7":"c","\xd0":"D","\xf0":"d","\xc8":"E","\xc9":"E","\xca":"E","\xcb":"E","\xe8":"e","\xe9":"e","\xea":"e","\xeb":"e","\xcc":"I","\xcd":"I","\xce":"I","\xcf":"I","\xec":"i","\xed":"i","\xee":"i","\xef":"i","\xd1":"N","\xf1":"n","\xd2":"O","\xd3":"O","\xd4":"O","\xd5":"O","\xd6":"O","\xd8":"O","\xf2":"o","\xf3":"o","\xf4":"o","\xf5":"o","\xf6":"o","\xf8":"o","\xd9":"U","\xda":"U","\xdb":"U","\xdc":"U","\xf9":"u","\xfa":"u","\xfb":"u","\xfc":"u","\xdd":"Y","\xfd":"y","\xff":"y","\xc6":"Ae","\xe6":"ae","\xde":"Th","\xfe":"th","\xdf":"ss"},Lt={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","`":"&#96;"},$t={"&amp;":"&","&lt;":"<","&gt;":">","&quot;":'"',"&#39;":"'","&#96;":"`"},qt={filter:P,map:z,takeWhile:3},Pt={"function":true,object:true},zt={"\\":"\\","'":"'","\n":"n","\r":"r","\u2028":"u2028","\u2029":"u2029"},Bt=Pt[typeof window]&&window||this,Mt=Pt[typeof exports]&&exports&&!exports.nodeType&&exports,Kt=Pt[typeof module]&&module&&!module.nodeType&&module,Vt=Mt&&Kt&&typeof global=="object"&&global;
+!Vt||Vt.global!==Vt&&Vt.window!==Vt&&Vt.self!==Vt||(Bt=Vt);var Yt=Kt&&Kt.exports===Mt&&Mt,Zt=function(){try{({toString:0}+"")}catch(n){return function(){return false}}return function(n){return typeof n.toString!="function"&&typeof(n+"")=="string"}}(),Gt=C();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(Bt._=Gt, define(function(){return Gt})):Mt&&Kt?Yt?(Kt.exports=Gt)._=Gt:Mt._=Gt:Bt._=Gt}).call(this);
\ No newline at end of file
diff --git a/dist/lodash.js b/dist/lodash.js
index 047ea0f70..fc16c7f70 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -32,20 +32,14 @@
   var HOT_COUNT = 150,
       HOT_SPAN = 16;
 
-  /** Used as the TypeError message for "Functions" methods */
+  /** Used to indicate the type of lazy iteratees */
+  var LAZY_FILTER_FLAG = 1,
+      LAZY_MAP_FLAG = 2,
+      LAZY_WHILE_FLAG = 3;
+
+  /** Used as the `TypeError` message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
-  /** Used as references for the max length and index of an array */
-  var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
-      MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
-
-  /**
-   * Used as the maximum length of an array-like value.
-   * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
-   * for more details.
-   */
-  var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
-
   /** Used as the internal argument placeholder */
   var PLACEHOLDER = '__lodash_placeholder__';
 
@@ -200,6 +194,27 @@
     'trailing': false
   };
 
+  /** Used to map latin-1 supplementary letters to basic latin letters */
+  var deburredLetters = {
+    '\xC0': 'A',  '\xC1': 'A', '\xC2': 'A', '\xC3': 'A', '\xC4': 'A', '\xC5': 'A',
+    '\xE0': 'a',  '\xE1': 'a', '\xE2': 'a', '\xE3': 'a', '\xE4': 'a', '\xE5': 'a',
+    '\xC7': 'C',  '\xE7': 'c',
+    '\xD0': 'D',  '\xF0': 'd',
+    '\xC8': 'E',  '\xC9': 'E', '\xCA': 'E', '\xCB': 'E',
+    '\xE8': 'e',  '\xE9': 'e', '\xEA': 'e', '\xEB': 'e',
+    '\xCC': 'I',  '\xCD': 'I', '\xCE': 'I', '\xCF': 'I',
+    '\xEC': 'i',  '\xED': 'i', '\xEE': 'i', '\xEF': 'i',
+    '\xD1': 'N',  '\xF1': 'n',
+    '\xD2': 'O',  '\xD3': 'O', '\xD4': 'O', '\xD5': 'O', '\xD6': 'O', '\xD8': 'O',
+    '\xF2': 'o',  '\xF3': 'o', '\xF4': 'o', '\xF5': 'o', '\xF6': 'o', '\xF8': 'o',
+    '\xD9': 'U',  '\xDA': 'U', '\xDB': 'U', '\xDC': 'U',
+    '\xF9': 'u',  '\xFA': 'u', '\xFB': 'u', '\xFC': 'u',
+    '\xDD': 'Y',  '\xFD': 'y', '\xFF': 'y',
+    '\xC6': 'Ae', '\xE6': 'ae',
+    '\xDE': 'Th', '\xFE': 'th',
+    '\xDF': 'ss'
+  };
+
   /**
    * Used to map characters to HTML entities.
    *
@@ -233,25 +248,11 @@
     '&#96;': '`'
   };
 
-  /** Used to map latin-1 supplementary letters to basic latin letters */
-  var deburredLetters = {
-    '\xC0': 'A',  '\xC1': 'A', '\xC2': 'A', '\xC3': 'A', '\xC4': 'A', '\xC5': 'A',
-    '\xE0': 'a',  '\xE1': 'a', '\xE2': 'a', '\xE3': 'a', '\xE4': 'a', '\xE5': 'a',
-    '\xC7': 'C',  '\xE7': 'c',
-    '\xD0': 'D',  '\xF0': 'd',
-    '\xC8': 'E',  '\xC9': 'E', '\xCA': 'E', '\xCB': 'E',
-    '\xE8': 'e',  '\xE9': 'e', '\xEA': 'e', '\xEB': 'e',
-    '\xCC': 'I',  '\xCD': 'I', '\xCE': 'I', '\xCF': 'I',
-    '\xEC': 'i',  '\xED': 'i', '\xEE': 'i', '\xEF': 'i',
-    '\xD1': 'N',  '\xF1': 'n',
-    '\xD2': 'O',  '\xD3': 'O', '\xD4': 'O', '\xD5': 'O', '\xD6': 'O', '\xD8': 'O',
-    '\xF2': 'o',  '\xF3': 'o', '\xF4': 'o', '\xF5': 'o', '\xF6': 'o', '\xF8': 'o',
-    '\xD9': 'U',  '\xDA': 'U', '\xDB': 'U', '\xDC': 'U',
-    '\xF9': 'u',  '\xFA': 'u', '\xFB': 'u', '\xFC': 'u',
-    '\xDD': 'Y',  '\xFD': 'y', '\xFF': 'y',
-    '\xC6': 'Ae', '\xE6': 'ae',
-    '\xDE': 'Th', '\xFE': 'th',
-    '\xDF': 'ss'
+  /** Used to map iteratee types to lazy methods */
+  var lazyIterateeTypes = {
+    'filter': LAZY_FILTER_FLAG,
+    'map': LAZY_MAP_FLAG,
+    'takeWhile': LAZY_WHILE_FLAG
   };
 
   /** Used to determine if values are of the language type `Object` */
@@ -353,26 +354,6 @@
     return true;
   }
 
-  /**
-   * A specialized version of `_.map` for arrays without support for callback
-   * shorthands or `this` binding.
-   *
-   * @private
-   * @param {Array} array The array to iterate over.
-   * @param {Function} iteratee The function invoked per iteration.
-   * @returns {Array} Returns the new mapped array.
-   */
-  function arrayMap(array, iteratee) {
-    var index = -1,
-        length = array.length,
-        result = Array(length);
-
-    while (++index < length) {
-      result[index] = iteratee(array[index], index, array);
-    }
-    return result;
-  }
-
   /**
    * A specialized version of `_.filter` for arrays without support for callback
    * shorthands or `this` binding.
@@ -397,6 +378,26 @@
     return result;
   }
 
+  /**
+   * A specialized version of `_.map` for arrays without support for callback
+   * shorthands or `this` binding.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   */
+  function arrayMap(array, iteratee) {
+    var index = -1,
+        length = array.length,
+        result = Array(length);
+
+    while (++index < length) {
+      result[index] = iteratee(array[index], index, array);
+    }
+    return result;
+  }
+
   /**
    * A specialized version of `_.reduce` for arrays without support for callback
    * shorthands or `this` binding.
@@ -658,7 +659,7 @@
   }
 
   /**
-   * Used by `deburr` to convert latin-1 to basic latin letters.
+   * Used by `_.deburr` to convert latin-1 to basic latin letters.
    *
    * @private
    * @param {string} letter The matched letter to deburr.
@@ -732,7 +733,7 @@
   }
 
   /**
-   * Used by `_.trimmedLeftIndex` and `_.trimmedRightIndex` to determine if a
+   * Used by `trimmedLeftIndex` and `trimmedRightIndex` to determine if a
    * character code is whitespace.
    *
    * @private
@@ -951,9 +952,24 @@
         nativeParseInt = context.parseInt,
         nativeRandom = Math.random;
 
+    /** Used as references for `-Infinity` and `Infinity` */
+    var NEGATIVE_INFINITY = Number.NEGATIVE_INFINITY,
+        POSITIVE_INFINITY = Number.POSITIVE_INFINITY;
+
+    /** Used as references for the max length and index of an array */
+    var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
+        MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
+
     /** Used as the size, in bytes, of each Float64Array element */
     var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0;
 
+    /**
+     * Used as the maximum length of an array-like value.
+     * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+     * for more details.
+     */
+    var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
+
     /** Used to store function metadata */
     var metaMap = WeakMap && new WeakMap;
 
@@ -1029,29 +1045,14 @@
      */
     function lodash(value) {
       if (value && typeof value == 'object') {
-        if (value instanceof lodashWrapper) {
+        if (value instanceof LodashWrapper) {
           return value;
         }
         if (!isArray(value) && hasOwnProperty.call(value, '__wrapped__')) {
-          return new lodashWrapper(value.__wrapped__, value.__chain__, baseSlice(value.__queue__));
+          return new LodashWrapper(value.__wrapped__, value.__chain__, baseSlice(value.__queue__));
         }
       }
-      return new lodashWrapper(value);
-    }
-
-    /**
-     * A fast path for creating `lodash` wrapper objects.
-     *
-     * @private
-     * @param {*} value The value to wrap in a `lodash` instance.
-     * @param {boolean} [chainAll=false] Enable chaining for all methods.
-     * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
-     * @returns {Object} Returns a `lodash` instance.
-     */
-    function lodashWrapper(value, chainAll, queue) {
-      this.__chain__ = !!chainAll;
-      this.__queue__ = queue || [];
-      this.__wrapped__ = value;
+      return new LodashWrapper(value);
     }
 
     /**
@@ -1177,6 +1178,48 @@
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * A specialized version of `_.max` for arrays without support for iteratees.
+     *
+     * @private
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the maximum value.
+     */
+    function arrayMax(array) {
+      var index = -1,
+          length = array.length,
+          result = NEGATIVE_INFINITY;
+
+      while (++index < length) {
+        var value = array[index];
+        if (value > result) {
+          result = value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * A specialized version of `_.min` for arrays without support for iteratees.
+     *
+     * @private
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the minimum value.
+     */
+    function arrayMin(array) {
+      var index = -1,
+          length = array.length,
+          result = POSITIVE_INFINITY;
+
+      while (++index < length) {
+        var value = array[index];
+        if (value < result) {
+          result = value;
+        }
+      }
+      return result;
+    }
+
     /**
      * Used by `_.defaults` to customize its `_.assign` use.
      *
@@ -1186,9 +1229,7 @@
      * @returns {*} Returns the value to assign to the destination object.
      */
     function assignDefaults(objectValue, sourceValue) {
-      return typeof objectValue == 'undefined'
-        ? sourceValue
-        : objectValue;
+      return typeof objectValue == 'undefined' ? sourceValue : objectValue;
     }
 
     /**
@@ -1210,6 +1251,18 @@
         : objectValue;
     }
 
+    /**
+     * Used by `_.matches` to clone `source` values, letting uncloneable values
+     * passthu instead of returning empty objects.
+     *
+     * @private
+     * @param {*} value The value to clone.
+     * @returns {*} Returns the cloned value.
+     */
+    function clonePassthru(value) {
+      return isCloneable(value) ? undefined : value;
+    }
+
     /**
      * The base implementation of `_.assign` without support for argument juggling,
      * multiple sources, and `this` binding.
@@ -1259,7 +1312,7 @@
      * "_.pluck" and "_.where" style callbacks.
      *
      * @private
-     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [func=_.identity] The value to convert to a callback.
      * @param {*} [thisArg] The `this` binding of the created callback.
      * @param {number} [argCount] The number of arguments the callback accepts.
      * @returns {Function} Returns the new function.
@@ -1273,6 +1326,7 @@
         }
         var data = getData(func);
         if (typeof data == 'undefined') {
+          var support = lodash.support;
           if (support.funcNames) {
             data = !func.name;
           }
@@ -1326,12 +1380,17 @@
      * @param {*} value The value to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
      * @param {Function} [customizer] The function to customize cloning values.
+     * @param {string} [key] The key of `value`.
+     * @param {Object} [object] The object `value` belongs to.
      * @param {Array} [stackA=[]] Tracks traversed source objects.
      * @param {Array} [stackB=[]] Associates clones with source counterparts.
      * @returns {*} Returns the cloned value.
      */
-    function baseClone(value, isDeep, customizer, stackA, stackB) {
-      var result = customizer ? customizer(value) : undefined;
+    function baseClone(value, isDeep, customizer, key, object, stackA, stackB) {
+      var result;
+      if (customizer) {
+        result = object ? customizer(value, key, object) : customizer(value);
+      }
       if (typeof result != 'undefined') {
         return result;
       }
@@ -1341,7 +1400,12 @@
         result = initArrayClone(value, isDeep);
       } else if (isObject(value)) {
         result = initObjectClone(value, isDeep);
-        value = (isDeep && toString.call(result) == objectClass) ? value : result;
+        if (result === null) {
+          isDeep = false;
+          result = {};
+        } else if (isDeep) {
+          isDeep = toString.call(result) == objectClass;
+        }
       }
       if (!isDeep || result === value) {
         return result;
@@ -1362,11 +1426,8 @@
       stackB.push(result);
 
       // recursively populate clone (susceptible to call stack limits)
-      (isArr ? arrayEach : baseForOwn)(value, function(valValue, key) {
-        var valClone = customizer ? customizer(valValue, key) : undefined;
-        result[key] = typeof valClone == 'undefined'
-          ? baseClone(valValue, isDeep, null, stackA, stackB)
-          : valClone;
+      (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
+        result[key] = baseClone(subValue, isDeep, customizer, key, value, stackA, stackB);
       });
       return result;
     }
@@ -1529,8 +1590,8 @@
     }
 
     /**
-     * The base implementation of `_.filter` without support for callback shorthands
-     * or `this` binding.
+     * The base implementation of `_.filter` without support for callback
+     * shorthands or `this` binding.
      *
      * @private
      * @param {Array|Object|string} collection The collection to iterate over.
@@ -2037,6 +2098,7 @@
      * @param {Function} func The function to partially apply arguments to.
      * @param {number} bitmask The bitmask of flags to compose.
      * @param {Array} args The arguments to be partially applied.
+     * @param {Array} holders The `args` placeholder indexes.
      * @param {*} [thisArg] The `this` binding of `func`.
      * @returns {Function} Returns the new partially applied function.
      */
@@ -2327,7 +2389,7 @@
      *
      * @private
      * @param {Array} partialRightArgs The arguments to append to those provided.
-     * @param {Array} partialHolders The `partialRightArgs` placeholder indexes.
+     * @param {Array} partialRightHolders The `partialRightArgs` placeholder indexes.
      * @param {Array|Object} args The provided arguments.
      * @returns {Array} Returns the new array of composed arguments.
      */
@@ -2427,7 +2489,7 @@
      * @private
      * @param {Function} func The function to bind.
      * @param {*} [thisArg] The `this` binding of `func`.
-     * @returns {Function} Returns the new wrapped function.
+     * @returns {Function} Returns the new bound function.
      */
     function createBindWrapper(func, thisArg) {
       var Ctor = createCtorWrapper(func);
@@ -2472,7 +2534,7 @@
             result = '';
 
         while (++index < length) {
-          result = callback(result, array[index], index, words);
+          result = callback(result, array[index], index);
         }
         return result;
       };
@@ -2484,7 +2546,7 @@
      *
      * @private
      * @param {Function} Ctor The constructor to wrap.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createCtorWrapper(Ctor) {
       return function() {
@@ -2510,7 +2572,7 @@
      * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
      * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
      * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createHybridWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
       var isBind = bitmask & BIND_FLAG,
@@ -2648,7 +2710,7 @@
      * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
      * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
      * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-     * @returns {Function} Returns the new function.
+     * @returns {Function} Returns the new wrapped function.
      */
     function createWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
       var isBindKey = bitmask & BIND_KEY_FLAG;
@@ -2763,9 +2825,9 @@
      * Initializes an array clone.
      *
      * @private
-     * @param {*} value The value to clone.
+     * @param {Array} array The array to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
-     * @returns {*} Returns the initialized clone value.
+     * @returns {Array} Returns the initialized array clone.
      */
     function initArrayClone(array, isDeep) {
       var index = -1,
@@ -2789,16 +2851,16 @@
      * Initializes an object clone.
      *
      * @private
-     * @param {*} value The value to clone.
+     * @param {Object} object The object to clone.
      * @param {boolean} [isDeep=false] Specify a deep clone.
-     * @returns {*} Returns the initialized clone value.
+     * @returns {null|Object} Returns the initialized object clone.
      */
     function initObjectClone(object, isDeep) {
-      var className = toString.call(object);
-      if (!cloneableClasses[className]) {
-        return object;
+      if (!isCloneable(object)) {
+        return null;
       }
       var Ctor = object.constructor,
+          className = toString.call(object),
           isArgs = className == argsClass,
           isObj = className == objectClass;
 
@@ -2849,6 +2911,17 @@
         arrayLikeClasses[toString.call(value)]) || false;
     }
 
+    /**
+     * Checks if `value` is cloneable.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is cloneable, else `false`.
+     */
+    function isCloneable(value) {
+      return (value && cloneableClasses[toString.call(value)]) || false;
+    }
+
     /**
      * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
      *
@@ -2949,7 +3022,7 @@
      */
     function shimIsPlainObject(value) {
       var Ctor,
-          result;
+          support = lodash.support;
 
       // exit early for non `Object` objects
       if (!(value && typeof value == 'object' &&
@@ -2958,10 +3031,14 @@
             (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
         return false;
       }
+      // IE < 9 iterates inherited properties before own properties. If the first
+      // iterated property is an object's own property then there are no inherited
+      // enumerable properties.
+      var result;
       // 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.
-      baseForIn(value, function(value, key) {
+      baseForIn(value, function(subValue, key) {
         result = key;
       });
       return typeof result == 'undefined' || hasOwnProperty.call(value, result);
@@ -2976,20 +3053,21 @@
      * @returns {Array} Returns the array of property names.
      */
     function shimKeys(object) {
-      var keyIndex,
-          index = -1,
-          props = keysIn(object),
+      var props = keysIn(object),
           length = props.length,
           objLength = length && object.length,
-          maxIndex = objLength - 1,
-          result = [];
+          support = lodash.support;
 
       var allowIndexes = typeof objLength == 'number' && objLength > 0 &&
         (isArray(object) || (support.nonEnumArgs && isArguments(object)));
 
+      var keyIndex,
+          index = -1,
+          result = [];
+
       while (++index < length) {
         var key = props[index];
-        if ((allowIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex <= maxIndex && keyIndex % 1 == 0)) ||
+        if ((allowIndexes && (keyIndex = +key, keyIndex > -1 && keyIndex < objLength && keyIndex % 1 == 0)) ||
             hasOwnProperty.call(object, key)) {
           result.push(key);
         }
@@ -3094,8 +3172,9 @@
      * Creates an array excluding all values of the provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3201,7 +3280,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -3250,7 +3329,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -3297,7 +3376,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3351,7 +3430,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3459,8 +3538,9 @@
      * it is used as the offset from the end of the collection. If `array` is
      * sorted providing `true` for `fromIndex` performs a faster binary search.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3492,8 +3572,10 @@
       if (typeof fromIndex == 'number') {
         fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
       } else if (fromIndex) {
-        var index = sortedIndex(array, value);
-        return array[index] === value ? index : -1;
+        var index = sortedIndex(array, value),
+            other = array[index];
+
+        return (value === value ? value === other : other !== other) ? index : -1;
       }
       return baseIndexOf(array, value, fromIndex);
     }
@@ -3512,16 +3594,16 @@
      * // => [1, 2]
      */
     function initial(array) {
-      var length = array ? array.length : 0;
-      return slice(array, 0, (length || 1) - 1);
+      return dropRight(array, 1);
     }
 
     /**
      * Creates an array of unique values present in all provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -3630,7 +3712,8 @@
         index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1;
       } else if (fromIndex) {
         index = sortedLastIndex(array, value) - 1;
-        return array[index] === value ? index : -1;
+        var other = array[index];
+        return (value === value ? value === other : other !== other) ? index : -1;
       }
       if (value !== value) {
         return indexOfNaN(array, index, true);
@@ -3649,8 +3732,9 @@
      *
      * **Notes:**
      *  - Unlike `_.without`, this method mutates `array`.
-     *  - `SameValueZero` is like strict equality, e.g. `===`, except that `NaN` matches `NaN`.
-     *    See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     *  - `SameValueZero` comparisons are like strict equality comparisons,
+     *    e.g. `===`, except that `NaN` matches `NaN`. See the
+     *    [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      *    for more details.
      *
      * @static
@@ -3733,7 +3817,7 @@
      * @memberOf _
      * @category Array
      * @param {Array} array The array to modify.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3781,7 +3865,7 @@
      * // => [2, 3]
      */
     function rest(array) {
-      return slice(array, 1);
+      return drop(array, 1);
     }
 
     /**
@@ -3846,7 +3930,7 @@
      * @category Array
      * @param {Array} array The array to inspect.
      * @param {*} value The value to evaluate.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3887,7 +3971,7 @@
      * @category Array
      * @param {Array} array The array to inspect.
      * @param {*} value The value to evaluate.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3982,7 +4066,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -4031,7 +4115,7 @@
      * @type Function
      * @category Array
      * @param {Array} array The array to query.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per element.
      * @param {*} [thisArg] The `this` binding of `predicate`.
      * @returns {Array} Returns the slice of `array`.
@@ -4067,8 +4151,9 @@
      * Creates an array of unique values, in order, of the provided arrays using
      * `SameValueZero` for equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4100,8 +4185,9 @@
      * returns `true` for elements that have the properties of the given object,
      * else `false`.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4184,8 +4270,9 @@
      * Creates an array excluding all provided values using `SameValueZero` for
      * equality comparisons.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4271,25 +4358,25 @@
      * @alias object
      * @category Array
      * @param {Array} props The property names.
-     * @param {Array} [vals=[]] The property values.
+     * @param {Array} [values=[]] The property values.
      * @returns {Object} Returns the new object.
      * @example
      *
      * _.zipObject(['fred', 'barney'], [30, 40]);
      * // => { 'fred': 30, 'barney': 40 }
      */
-    function zipObject(props, vals) {
+    function zipObject(props, values) {
       var index = -1,
           length = props ? props.length : 0,
           result = {};
 
-      if (!vals && length && !isArray(props[0])) {
-        vals = [];
+      if (!values && length && !isArray(props[0])) {
+        values = [];
       }
       while (++index < length) {
         var key = props[index];
-        if (vals) {
-          result[key] = vals[index];
+        if (values) {
+          result[key] = values[index];
         } else if (key) {
           result[key[0]] = key[1];
         }
@@ -4307,7 +4394,7 @@
      * @memberOf _
      * @category Chain
      * @param {*} value The value to wrap.
-     * @returns {Object} Returns the new wrapper object.
+     * @returns {Object} Returns the new `LodashWrapper` object.
      * @example
      *
      * var users = [
@@ -4377,13 +4464,30 @@
       return interceptor.call(thisArg, value);
     }
 
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * A fast path for creating `lodash` wrapper objects.
+     *
+     * @private
+     * @param {*} value The value to wrap.
+     * @param {boolean} [chainAll=false] Enable chaining for all methods.
+     * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
+     * @returns {Object} Returns a `LodashWrapper` instance.
+     */
+    function LodashWrapper(value, chainAll, queue) {
+      this.__chain__ = !!chainAll;
+      this.__queue__ = queue || [];
+      this.__wrapped__ = value;
+    }
+
     /**
      * Enables explicit method chaining on the wrapper object.
      *
      * @name chain
      * @memberOf _
      * @category Chain
-     * @returns {*} Returns the wrapper object.
+     * @returns {*} Returns the `LodashWrapper` object.
      * @example
      *
      * var users = [
@@ -4406,6 +4510,32 @@
       return chain(this);
     }
 
+    /**
+     * Reverses the wrapped array so the first element becomes the last, the
+     * second element becomes the second to last, and so on.
+     *
+     * **Note:** This method mutates the wrapped array.
+     *
+     * @name chain
+     * @memberOf _
+     * @category Chain
+     * @returns {Object} Returns the new reversed `LodashWrapper` object.
+     * @example
+     *
+     * var array = [1, 2, 3];
+     *
+     * _(array).reverse().value()
+     * // => [3, 2, 1]
+     *
+     * console.log(array);
+     * // => [3, 2, 1]
+     */
+    function wrapperReverse() {
+      return this.thru(function(value) {
+        return value.reverse();
+      });
+    }
+
     /**
      * Produces the result of coercing the unwrapped value to a string.
      *
@@ -4436,24 +4566,152 @@
      * // => [1, 2, 3]
      */
     function wrapperValueOf() {
+      var result = this.__wrapped__;
+      if (result instanceof LazyWrapper) {
+        result = result.value();
+      }
       var index = -1,
           queue = this.__queue__,
-          length = queue.length,
-          result = this.__wrapped__;
+          length = queue.length;
 
       while (++index < length) {
         var args = [result],
             data = queue[index],
-            object = data[1];
+            object = data.object;
 
-        push.apply(args, data[2]);
-        result = object[data[0]].apply(object, args);
+        push.apply(args, data.args);
+        result = object[data.name].apply(object, args);
       }
       return result;
     }
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * Wraps `value` as a `LazyWrapper` object.
+     *
+     * @private
+     * @param {*} value The value to wrap.
+     * @returns {Object} Returns a `LazyWrapper` instance.
+     */
+    function LazyWrapper(value) {
+      this.dir = 1;
+      this.dropCount = 0;
+      this.filtered = false;
+      this.iteratees = [];
+      this.takeCount = POSITIVE_INFINITY;
+      this.views = [];
+      this.wrapped = value;
+    }
+
+    /**
+     * Creates a clone of the `LazyWrapper` object.
+     *
+     * @private
+     * @name clone
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the cloned `LazyWrapper` object.
+     */
+    function lazyClone() {
+      var result = new LazyWrapper(this.wrapped);
+      result.dir = this.dir;
+      result.dropCount = this.dropCount;
+      result.filtered = this.filtered;
+      result.takeCount = this.takeCount;
+      push.apply(result.iteratees, this.iteratees);
+      push.apply(result.views, this.views);
+      return result;
+    }
+
+    /**
+     * Reverses the direction of lazy iteration.
+     *
+     * @private
+     * @name reverse
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the new reversed `LazyWrapper` object.
+     */
+    function lazyReverse() {
+      var filtered = this.filtered,
+          result = filtered ? new LazyWrapper(this) : this.clone();
+
+      result.dir = this.dir * -1;
+      result.filtered = filtered;
+      return result;
+    }
+
+    /**
+     * Extracts the unwrapped value from its wrapper.
+     *
+     * @private
+     * @name value
+     * @memberOf LazyWrapper
+     * @returns {*} Returns the unwrapped value.
+     */
+    function lazyValue() {
+      var array = this.wrapped.value(),
+          length = array.length,
+          start = 0,
+          end = length,
+          views = this.views,
+          viewIndex = -1,
+          viewsLength = views.length;
+
+      while (++viewIndex < viewsLength) {
+        var view = views[viewIndex],
+            size = view.size;
+
+        switch (view.type) {
+          case 'drop':      start += size; break;
+          case 'dropRight': end -= size; break;
+          case 'take':      end = nativeMin(end, start + size); break;
+          case 'takeRight': start = nativeMax(start, end - size); break;
+        }
+      }
+      var dir = this.dir,
+          dropCount = this.dropCount,
+          droppedCount = 0,
+          doneDropping = !dropCount,
+          takeCount = nativeMin(end - start, this.takeCount - dropCount),
+          isRight = dir < 0,
+          index = isRight ? end : start - 1,
+          iteratees = this.iteratees,
+          iterateesLength = iteratees.length,
+          resIndex = 0,
+          result = [];
+
+      outer:
+      while (length-- && resIndex < takeCount) {
+        var iterateesIndex = -1,
+            value = array[index += dir];
+
+        while (++iterateesIndex < iterateesLength) {
+          var data = iteratees[iterateesIndex],
+              iteratee = data.iteratee,
+              computed = iteratee(value, index, array),
+              type = data.type;
+
+          if (type == LAZY_MAP_FLAG) {
+            value = computed;
+          } else if (!computed) {
+            if (type == LAZY_FILTER_FLAG) {
+              continue outer;
+            } else {
+              break outer;
+            }
+          }
+        }
+        if (doneDropping) {
+          result[resIndex++] = value;
+        } else {
+          doneDropping = ++droppedCount >= dropCount;
+        }
+      }
+      return isRight ? result.reverse() : result;
+    }
+
+    /*------------------------------------------------------------------------*/
+
     /**
      * Creates an array of elements corresponding to the specified keys, or indexes,
      * of the collection. Keys may be specified as individual arguments or as arrays
@@ -4484,12 +4742,13 @@
     }
 
     /**
-     * Checks if `value` is present in `collection` using  `SameValueZero` for
+     * Checks if `value` is present in `collection` using `SameValueZero` for
      * equality comparisons. If `fromIndex` is negative, it is used as the offset
      * from the end of the collection.
      *
-     * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-     * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+     * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+     * e.g. `===`, except that `NaN` matches `NaN`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
      * for more details.
      *
      * @static
@@ -4552,7 +4811,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4589,7 +4848,7 @@
      * @alias all
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4638,7 +4897,7 @@
      * @alias select
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4685,7 +4944,7 @@
      * @alias detect
      * @category Collection
      * @param {Array|Object|string} collection The collection to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4728,7 +4987,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -4786,7 +5045,7 @@
      * @alias each
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array|Object|string} Returns `collection`.
      * @example
@@ -4812,7 +5071,7 @@
      * @alias eachRight
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array|Object|string} Returns `collection`.
      * @example
@@ -4844,7 +5103,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4887,7 +5146,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -4955,7 +5214,7 @@
      * @alias collect
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5028,38 +5287,30 @@
      * // => { 'user': 'fred', 'age': 40 };
      */
     function max(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-      var computed = -Infinity,
-          noIteratee = iteratee == null,
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
+      var noIteratee = iteratee == null,
           isArr = noIteratee && isArray(collection),
-          isStr = !isArr && isString(collection),
-          result = computed;
+          isStr = !isArr && isString(collection);
 
       if (noIteratee && !isStr) {
-        var index = -1,
-            iterable = toIterable(collection),
-            length = iterable.length;
-
-        while (++index < length) {
-          var value = iterable[index];
-          if (value > result) {
-            result = value;
-          }
-        }
-      } else {
-        iteratee = (noIteratee && isStr)
-          ? charAtCallback
-          : getCallback(iteratee, thisArg, 3);
-
-        baseEach(collection, function(value, index, collection) {
-          var current = iteratee(value, index, collection);
-          if (current > computed || (current === -Infinity && current === result)) {
-            computed = current;
-            result = value;
-          }
-        });
+        return arrayMax(isArr ? collection : toIterable(collection));
       }
+      var computed = NEGATIVE_INFINITY,
+          result = computed;
+
+      iteratee = (noIteratee && isStr)
+        ? charAtCallback
+        : getCallback(iteratee, thisArg, 3);
+
+      baseEach(collection, function(value, index, collection) {
+        var current = iteratee(value, index, collection);
+        if (current > computed || (current === NEGATIVE_INFINITY && current === result)) {
+          computed = current;
+          result = value;
+        }
+      });
       return result;
     }
 
@@ -5107,38 +5358,30 @@
      * // => { 'user': 'barney', 'age': 36 };
      */
     function min(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-      var computed = Infinity,
-          noIteratee = iteratee == null,
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
+      var noIteratee = iteratee == null,
           isArr = noIteratee && isArray(collection),
-          isStr = !isArr && isString(collection),
-          result = computed;
+          isStr = !isArr && isString(collection);
 
       if (noIteratee && !isStr) {
-        var index = -1,
-            iterable = toIterable(collection),
-            length = iterable.length;
-
-        while (++index < length) {
-          var value = iterable[index];
-          if (value < result) {
-            result = value;
-          }
-        }
-      } else {
-        iteratee = (noIteratee && isStr)
-          ? charAtCallback
-          : getCallback(iteratee, thisArg, 3);
-
-        baseEach(collection, function(value, index, collection) {
-          var current = iteratee(value, index, collection);
-          if (current < computed || (current === Infinity && current === result)) {
-            computed = current;
-            result = value;
-          }
-        });
+        return arrayMin(isArr ? collection : toIterable(collection));
       }
+      var computed = POSITIVE_INFINITY,
+          result = computed;
+
+      iteratee = (noIteratee && isStr)
+        ? charAtCallback
+        : getCallback(iteratee, thisArg, 3);
+
+      baseEach(collection, function(value, index, collection) {
+        var current = iteratee(value, index, collection);
+        if (current < computed || (current === POSITIVE_INFINITY && current === result)) {
+          computed = current;
+          result = value;
+        }
+      });
       return result;
     }
 
@@ -5159,7 +5402,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5230,7 +5473,7 @@
      * @alias foldl, inject
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The initial value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -5259,7 +5502,7 @@
      * @alias foldr
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The initial value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -5289,7 +5532,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5427,7 +5670,7 @@
      * @alias any
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -5480,7 +5723,7 @@
      * @memberOf _
      * @category Collection
      * @param {Array|Object|string} collection The collection to iterate over.
-     * @param {Array|Function|Object|string} [iteratee=identity] The function
+     * @param {Array|Function|Object|string} [iteratee=_.identity] The function
      *  invoked per iteration. If property name(s) or an object is provided it
      *  is used to create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -5509,8 +5752,9 @@
      * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
      */
     function sortBy(collection, iteratee, thisArg) {
-      iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
+      if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+        iteratee = null;
+      }
       var index = -1,
           length = collection ? collection.length : 0,
           multi = iteratee && isArray(iteratee),
@@ -6179,9 +6423,16 @@
      * Creates a function that memoizes the result of `func`. If `resolver` is
      * provided it determines the cache key for storing the result based on the
      * arguments provided to the memoized function. By default, the first argument
-     * provided to the memoized function is used as the cache key. The `func` is
-     * invoked with the `this` binding of the memoized function. The result cache
-     * is exposed as the `cache` property on the memoized function.
+     * provided to the memoized function is coerced to a string and used as the
+     * cache key. The `func` is invoked with the `this` binding of the memoized
+     * function.
+     *
+     * **Note:** The cache is exposed as the `cache` property on the memoized
+     * function. Its creation may be customized by replacing the `_.memoize.Cache`
+     * constructor with one whose instances implement the ES6 `Map` method interface
+     * of `get`, `has`, and `set`. See the
+     * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-properties-of-the-map-prototype-object)
+     * for more details.
      *
      * @static
      * @memberOf _
@@ -6206,7 +6457,7 @@
      * upperCase('fred');
      * // => 'FRED'
      *
-     * upperCase.cache.fred = 'BARNEY'
+     * upperCase.cache.set('fred, 'BARNEY');
      * upperCase('fred');
      * // => 'BARNEY'
      */
@@ -6215,16 +6466,17 @@
         throw new TypeError(FUNC_ERROR_TEXT);
       }
       var memoized = function() {
-        var key = resolver ? resolver.apply(this, arguments) : arguments[0];
-        if (key == '__proto__') {
-          return func.apply(this, arguments);
+        var cache = memoized.cache,
+            key = resolver ? resolver.apply(this, arguments) : arguments[0];
+
+        if (cache.has(key)) {
+          return cache.get(key);
         }
-        var cache = memoized.cache;
-        return hasOwnProperty.call(cache, key)
-          ? cache[key]
-          : (cache[key] = func.apply(this, arguments));
+        var result = func.apply(this, arguments);
+        cache.set(key, result);
+        return result;
       };
-      memoized.cache = {};
+      memoized.cache = new memoize.Cache;
       return memoized;
     }
 
@@ -6274,7 +6526,7 @@
      * initialize();
      * // `initialize` invokes `createApplication` once
      */
-    var once = partial(before, 2);
+    var once = basePartial(before,PARTIAL_FLAG, [2], []);
 
     /**
      * Creates a function that invokes `func` with `partial` arguments prepended
@@ -6426,6 +6678,63 @@
 
     /*------------------------------------------------------------------------*/
 
+    /**
+     * Creates the cache used by `_.memoize`.
+     *
+     * @private
+     * @static
+     * @name Cache
+     * @memberOf _.memoize
+     */
+    function MemCache() {
+      this.__wrapped__ = {};
+    }
+
+    /**
+     * Gets the value associated with `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The key of the value to retrieve.
+     * @returns {*} Returns the cached value.
+     */
+    function memGet(key) {
+      return this.__wrapped__[key];
+    }
+
+    /**
+     * Checks if an entry for `key` exists.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The name of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function memHas(key) {
+      return key != '__proto__' && hasOwnProperty.call(this.__wrapped__, key);
+    }
+
+    /**
+     * Sets the value associated with `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf _.memoize.Cache
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the cache object.
+     */
+    function memSet(key, value) {
+      if (key != '__proto__') {
+        this.__wrapped__[key] = value;
+      }
+      return this;
+    }
+
+    /*------------------------------------------------------------------------*/
+
     /**
      * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
      * otherwise they are assigned by reference. If `customizer` is provided it is
@@ -6433,10 +6742,11 @@
      * cloning is handled by the method instead. The `customizer` is bound to
      * `thisArg` and invoked with two argument; (value, index|key).
      *
-     * **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 the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+     * **Note:** This method is loosely based on the structured clone algorithm.
+     * The enumerable properties of `arguments` objects and objects created by
+     * constructors other than `Object` are cloned to plain `Object` objects. An
+     * empty object is returned for uncloneable values such as functions, DOM nodes,
+     * Maps, Sets, and WeakMaps. See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
      * for more details.
      *
      * @static
@@ -6489,10 +6799,11 @@
      * is handled by the method instead. The `customizer` is bound to `thisArg`
      * and invoked with two argument; (value, index|key).
      *
-     * **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 the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+     * **Note:** This method is loosely based on the structured clone algorithm.
+     * The enumerable properties of `arguments` objects and objects created by
+     * constructors other than `Object` are cloned to plain `Object` objects. An
+     * empty object is returned for uncloneable values such as functions, DOM nodes,
+     * Maps, Sets, and WeakMaps. See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
      * for more details.
      *
      * @static
@@ -6537,7 +6848,7 @@
      * @memberOf _
      * @category Lang
      * @param {*} value The value to check.
-     * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+     * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
      * @example
      *
      * (function() { return _.isArguments(arguments); })();
@@ -7151,7 +7462,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -7197,7 +7508,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to search.
-     * @param {Function|Object|string} [predicate=identity] The function invoked
+     * @param {Function|Object|string} [predicate=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -7238,7 +7549,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7270,7 +7581,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7302,7 +7613,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7327,7 +7638,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Object} Returns `object`.
      * @example
@@ -7370,7 +7681,7 @@
      * @category Object
      * @param {Object} object The object to inspect.
      * @param {string} key The name of the property to check.
-     * @returns {boolean} Returns `true` if key is a direct property, else `false`.
+     * @returns {boolean} Returns `true` if `key` is a direct property, else `false`.
      * @example
      *
      * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
@@ -7532,7 +7843,7 @@
      * @memberOf _
      * @category Object
      * @param {Object} object The object to iterate over.
-     * @param {Function|Object|string} [iteratee=identity] The function invoked
+     * @param {Function|Object|string} [iteratee=_.identity] The function invoked
      *  per iteration. If a property name or object is provided it is used to
      *  create a "_.pluck" or "_.where" style callback respectively.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -7724,7 +8035,7 @@
      * @memberOf _
      * @category Object
      * @param {Array|Object} object The object to iterate over.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [accumulator] The custom accumulator value.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {*} Returns the accumulated value.
@@ -7866,7 +8177,7 @@
      * @memberOf _
      * @category String
      * @param {string} [string=''] The string to deburr.
-     * @returns {string} Returns the beburred string.
+     * @returns {string} Returns the deburred string.
      * @example
      *
      * _.deburr('déjà vu');
@@ -8275,7 +8586,7 @@
       // https://github.com/olado/doT
       var settings = lodash.templateSettings;
 
-      if (isIterateeCall(string, options, otherOptions)) {
+      if (otherOptions && isIterateeCall(string, options, otherOptions)) {
         options = otherOptions = null;
       }
       string = String(string == null ? '' : string);
@@ -8301,8 +8612,8 @@
 
       // use a sourceURL for easier debugging
       // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
-      var sourceURL = options.sourceURL || ('/lodash/template/source[' + (++templateCounter) + ']');
-      sourceURL = sourceURL ? ('\n/*\n//# sourceURL=' + sourceURL + '\n*/') : '';
+      var sourceURL = 'sourceURL' in options ? options.sourceURL : ('/lodash/template/source[' + (++templateCounter) + ']');
+      sourceURL = sourceURL ? ('\n//# sourceURL=' + sourceURL) : '';
 
       string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
         interpolateValue || (interpolateValue = esTemplateValue);
@@ -8635,7 +8946,7 @@
      * @memberOf _
      * @alias iteratee
      * @category Utility
-     * @param {*} [func=identity] The value to convert to a callback.
+     * @param {*} [func=_.identity] The value to convert to a callback.
      * @param {*} [thisArg] The `this` binding of the created callback.
      * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
      * @returns {Function} Returns the new function.
@@ -8743,15 +9054,15 @@
         }
       }
       var index = length,
-          flags = Array(length),
-          vals = Array(length);
+          values = Array(length),
+          strictCompareFlags = Array(length);
 
       while (index--) {
         value = source[props[index]];
         var isStrict = isStrictComparable(value);
 
-        flags[index] = isStrict;
-        vals[index] = isStrict ? value : baseClone(value);
+        values[index] = isStrict ? value : baseClone(value, true, clonePassthru);
+        strictCompareFlags[index] = isStrict;
       }
       return function(object) {
         index = length;
@@ -8759,13 +9070,19 @@
           return !index;
         }
         while (index--) {
-          if (flags[index] ? vals[index] !== object[props[index]] : !hasOwnProperty.call(object, props[index])) {
+          if (strictCompareFlags[index]
+                ? values[index] !== object[props[index]]
+                : !hasOwnProperty.call(object, props[index])
+              ) {
             return false;
           }
         }
         index = length;
         while (index--) {
-          if (flags[index] ? !hasOwnProperty.call(object, props[index]) : !baseIsEqual(vals[index], object[props[index]], null, true)) {
+          if (strictCompareFlags[index]
+                ? !hasOwnProperty.call(object, props[index])
+                : !baseIsEqual(values[index], object[props[index]], null, true)
+              ) {
             return false;
           }
         }
@@ -8837,10 +9154,11 @@
         if (isFunc) {
           object.prototype[methodName] = (function(methodName) {
             return function() {
-              if (chain || this.__chain__) {
+              var chainAll = this.__chain__;
+              if (chain || chainAll) {
                 var result = object(this.__wrapped__);
-                result.__chain__ = this.__chain__;
-                (result.__queue__ = baseSlice(this.__queue__)).push([methodName, object, arguments]);
+                result.__chain__ = chainAll;
+                (result.__queue__ = baseSlice(this.__queue__)).push({ 'args': arguments, 'object': object, 'name': methodName });
                 return result;
               }
               var args = [this.value()];
@@ -9031,7 +9349,7 @@
 
     /**
      * Creates an array of numbers (positive and/or negative) progressing from
-     * `start` up to but not including `end`. If `start` is less than `stop` a
+     * `start` up to but not including `end`. If `start` is less than `end` a
      * zero-length range is created unless a negative `step` is specified.
      *
      * @static
@@ -9137,7 +9455,7 @@
      * @memberOf _
      * @category Utility
      * @param {number} n The number of times to invoke `iteratee`.
-     * @param {Function} [iteratee=identity] The function invoked per iteration.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
      * @param {*} [thisArg] The `this` binding of `iteratee`.
      * @returns {Array} Returns the array of results.
      * @example
@@ -9191,6 +9509,17 @@
 
     /*------------------------------------------------------------------------*/
 
+    // ensure `new LodashWrapper` is an instance of `lodash`
+    LodashWrapper.prototype = lodash.prototype;
+
+    // add functions to the memoize cache
+    MemCache.prototype.get = memGet;
+    MemCache.prototype.has = memHas;
+    MemCache.prototype.set = memSet;
+
+    // assign cache to `_.memoize`
+    memoize.Cache = MemCache;
+
     // add functions that return wrapped values when chaining
     lodash.after = after;
     lodash.assign = assign;
@@ -9424,24 +9753,142 @@
      */
     lodash.VERSION = VERSION;
 
-    // ensure `new lodashWrapper` is an instance of `lodash`
-    lodashWrapper.prototype = lodash.prototype;
-
-    // add "Chaining" functions to the wrapper
-    lodash.prototype.chain = wrapperChain;
-    lodash.prototype.toString = wrapperToString;
-    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
-
     // assign default placeholders
     arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
       lodash[methodName].placeholder = lodash;
     });
 
-    // add `Array.prototype` functions
-    arrayEach(['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
+    // add `LazyWrapper` methods that accept an `iteratee` value
+    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
+      var isFilter = !index;
+
+      LazyWrapper.prototype[methodName] = function(iteratee, thisArg) {
+        iteratee = getCallback(iteratee, thisArg, 3);
+
+        var result = this.clone();
+        result.filtered = isFilter || result.filtered;
+        result.iteratees.push({ 'iteratee': iteratee, 'type': lazyIterateeTypes[methodName] });
+        return result;
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.drop` and `_.take` variants
+    arrayEach(['drop', 'take'], function(methodName) {
+      var countName = methodName + 'Count',
+          whileName = methodName + 'While';
+
+      LazyWrapper.prototype[methodName] = function(n) {
+        n = n == null ? 1 : nativeMax(+n || 0, 0);
+
+        var result = this.clone();
+        if (this.filtered) {
+          result[countName] = n;
+          return result;
+        }
+        result.views.push({
+          'size': n,
+          'type': methodName + (result.dir < 0 ? 'Right' : '')
+        });
+        return result;
+      };
+
+      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
+        return this.reverse()[methodName](n).reverse();
+      };
+
+      LazyWrapper.prototype[methodName + 'RightWhile'] = function(predicate, thisArg) {
+        var result = this.reverse()[whileName](predicate, thisArg);
+        result.filtered = true;
+        return result.reverse();
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.first` and `_.last`
+    arrayEach(['first', 'last'], function(methodName, index) {
+      var takeName = 'take' + (index ? 'Right': '');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this[takeName](1).value()[0];
+      };
+    });
+
+    // add `LazyWrapper` methods for `_.initial` and `_.rest`
+    arrayEach(['initial', 'rest'], function(methodName, index) {
+      var dropName = 'drop' + (index ? '' : 'Right');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this[dropName](1);
+      };
+    });
+
+    LazyWrapper.prototype.dropWhile = function(iteratee, thisArg) {
+      iteratee = getCallback(iteratee, thisArg, 3);
+
+      var done,
+          lastIndex,
+          isRight = this.dir < 0;
+
+      return this.filter(function(value, index, array) {
+        done = done && (isRight ? index < lastIndex : index > lastIndex);
+        lastIndex = index;
+        return done || (done = !iteratee(value, index, array));
+      });
+    };
+
+    LazyWrapper.prototype.reject = function(iteratee, thisArg) {
+      iteratee = getCallback(iteratee, thisArg, 3);
+
+      return this.filter(function(value, index, array) {
+        return !iteratee(value, index, array);
+      });
+    };
+
+    LazyWrapper.prototype.slice = function(start, end) {
+      start = start == null ? 0 : (+start || 0);
+      var result = start < 0 ? this.takeRight(-start) : this.drop(start);
+
+      if (typeof end != 'undefined') {
+        end = (+end || 0);
+        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+      }
+      return result;
+    };
+
+    // add `LazyWrapper` methods to `LodashWrapper`
+    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
+      var retUnwrapped = /^(?:first|last)$/.test(methodName);
+
+      lodash.prototype[methodName] = function() {
+        var args = arguments,
+            chainAll = this.__chain__,
+            value = this.__wrapped__,
+            isLazy = value instanceof LazyWrapper;
+
+        if (retUnwrapped && !chainAll) {
+          if (isLazy) {
+            return func.apply(value, args);
+          }
+          var otherArgs = [this.value()];
+          push.apply(otherArgs, args);
+          return lodash[methodName].apply(lodash, otherArgs);
+        }
+        if (isLazy || isArray(value)) {
+          var result = func.apply(isLazy ? value : new LazyWrapper(this), args);
+          return new LodashWrapper(result, chainAll);
+        }
+        return this.thru(function(value) {
+          var otherArgs = [value];
+          push.apply(otherArgs, args);
+          return lodash[methodName].apply(lodash, otherArgs);
+        });
+      };
+    });
+
+    // add `Array.prototype` functions to `LodashWrapper`
+    arrayEach(['concat', 'join', 'pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
       var func = arrayProto[methodName],
-          retUnwrapped = /^(?:join|pop|shift)$/.test(methodName),
-          chainName = /^(?:push|reverse|sort|unshift)$/.test(methodName) ? 'tap' : 'thru';
+          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+          retUnwrapped = /^(?:join|pop|shift)$/.test(methodName);
 
       lodash.prototype[methodName] = function() {
         var args = arguments;
@@ -9454,6 +9901,23 @@
       };
     });
 
+    // add functions to the lazy wrapper
+    LazyWrapper.prototype.clone = lazyClone;
+    LazyWrapper.prototype.reverse = lazyReverse;
+    LazyWrapper.prototype.value = lazyValue;
+
+    // add chaining functions to the lodash wrapper
+    lodash.prototype.chain = wrapperChain;
+    lodash.prototype.reverse = wrapperReverse;
+    lodash.prototype.toString = wrapperToString;
+    lodash.prototype.toJSON = lodash.prototype.value = lodash.prototype.valueOf = wrapperValueOf;
+
+    // add function aliases to the lodash wrapper
+    lodash.prototype.collect = lodash.prototype.map;
+    lodash.prototype.head = lodash.prototype.first;
+    lodash.prototype.select = lodash.prototype.filter;
+    lodash.prototype.tail = lodash.prototype.rest;
+
     return lodash;
   }
 
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index f4ef31fe9..08840f330 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -3,70 +3,78 @@
  * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.7.0 underscorejs.org/LICENSE
  * Build: `lodash modern -o ./dist/lodash.js`
  */
-;(function(){function n(n,t){for(var r=-1,e=n.length;++r<e&&false!==t(n[r],r,n););return n}function t(n,t){for(var r=-1,e=n.length;++r<e;)if(!t(n[r],r,n))return false;return true}function r(n,t){for(var r=-1,e=n.length,u=Array(e);++r<e;)u[r]=t(n[r],r,n);return u}function e(n,t){for(var r=-1,e=n.length,u=-1,o=[];++r<e;){var i=n[r];t(i,r,n)&&(o[++u]=i)}return o}function u(n,t,r,e){var u=-1,o=n.length;for(e&&o&&(r=n[++u]);++u<o;)r=t(r,n[u],u,n);return r}function o(n,t,r,e){var u=n.length;for(e&&u&&(r=n[--u]);u--;)r=t(r,n[u],u,n);
-return r}function i(n,t){for(var r=-1,e=n.length;++r<e;)if(t(n[r],r,n))return true;return false}function f(n,t){for(var r=-1,e=t.length,u=Array(e);++r<e;)u[r]=n[t[r]];return u}function a(n,t){if(n!==t){var r=n===n,e=t===t;if(n>t||!r||typeof n=="undefined"&&e)return 1;if(n<t||!e||typeof t=="undefined"&&r)return-1}return 0}function l(n,t,r){if(t!==t)return _(n,r);r=(r||0)-1;for(var e=n.length;++r<e;)if(n[r]===t)return r;return-1}function c(n){for(var t=-1,r=n?n.length:0,e=Array(r);++t<r;)e[t]=n[t];return e
-}function s(n,t){return n.has(t)?0:-1}function p(n){return n.charCodeAt(0)}function h(n,t){for(var r=-1,e=n.length;++r<e&&-1<t.indexOf(n.charAt(r)););return r}function g(n,t){for(var r=n.length;r--&&-1<t.indexOf(n.charAt(r)););return r}function v(n,t){return a(n.a,t.a)||n.b-t.b}function y(n,t){for(var r=-1,e=n.a,u=t.a,o=e.length;++r<o;){var i=a(e[r],u[r]);if(i)return i}return n.b-t.b}function d(n){return $t[n]}function m(n){return Wt[n]}function b(n){return"\\"+Lt[n]}function _(n,t,r){var e=n.length;
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+}),t.source=l,Fe(t))throw t;return t},Wt.trim=Me,Wt.trimLeft=function(n,t,r){return(n=null==n?"":fu(n))?r||null==t?n.slice(A(n)):(t=fu(t),n.slice(h(n,t))):n},Wt.trimRight=function(n,t,r){return(n=null==n?"":fu(n))?r||null==t?n.slice(0,E(n)+1):(t=fu(t),n.slice(0,g(n,t)+1)):n},Wt.trunc=function(n,t,r){t=r?null:t;var e=U;if(r=$,De(t)){var u="separator"in t?t.separator:u,e="length"in t?+t.length||0:e;r="omission"in t?fu(t.omission):r}else null!=t&&(e=+t||0);if(n=null==n?"":fu(n),e>=n.length)return n;
+if(e-=r.length,1>e)return r;if(t=n.slice(0,e),null==u)return t+r;if(We(u)){if(n.slice(e).search(u)){var o,i=n.slice(0,e);for(u.global||(u=iu(u.source,(tt.exec(u)||"")+"g")),u.lastIndex=0;n=u.exec(i);)o=n.index;t=t.slice(0,null==o?e:o)}}else n.indexOf(u,e)!=e&&(u=t.lastIndexOf(u),-1<u&&(t=t.slice(0,u)));return t+r},Wt.unescape=function(n){return(n=null==n?"":fu(n))&&(G.lastIndex=0,G.test(n))?n.replace(G,I):n},Wt.uniqueId=function(n){var t=++K;return fu(null==n?"":n)+t},Wt.words=Pe,Wt.all=oe,Wt.any=ye,Wt.detect=fe,Wt.foldl=he,Wt.foldr=ge,Wt.head=Vr,Wt.include=ue,Wt.inject=he,Ge(Wt,function(){var n={};
+return or(Wt,function(t,r){Wt.prototype[r]||(n[r]=t)}),n}(),false),Wt.sample=function(n,t,r){return r||null==t?(n=zr(n),t=n.length,0<t?n[hr(0,t-1)]:O):(n=ve(n),n.length=Nu(0>t?0:+t||0,n.length),n)},Wt.prototype.sample=function(n,t){return n=t?null:n,this.__chain__||null!=n?this.thru(function(t){return Wt.sample(t,n)}):Wt.sample(this.value())},Wt.VERSION=R,n("bind bindKey curry curryRight partial partialRight".split(" "),function(n){Wt[n].placeholder=Wt}),n(["filter","map","takeWhile"],function(n,t){var r=!t;
+ee.prototype[n]=function(t,e){t=Cr(t,e,3);var u=this.clone();return u.filtered=r||u.filtered,u.iteratees.push({iteratee:t,type:$t[n]}),u}}),n(["drop","take"],function(n){var t=n+"Count",r=n+"While";ee.prototype[n]=function(r){r=null==r?1:Wu(+r||0,0);var e=this.clone();return this.filtered?(e[t]=r,e):(e.views.push({size:r,type:n+(0>e.dir?"Right":"")}),e)},ee.prototype[n+"Right"]=function(t){return this.reverse()[n](t).reverse()},ee.prototype[n+"RightWhile"]=function(n,t){var e=this.reverse()[r](n,t);
+return e.filtered=true,e.reverse()}}),n(["first","last"],function(n,t){var r="take"+(t?"Right":"");ee.prototype[n]=function(){return this[r](1).value()[0]}}),n(["initial","rest"],function(n,t){var r="drop"+(t?"":"Right");ee.prototype[n]=function(){return this[r](1)}}),ee.prototype.dropWhile=function(n,t){n=Cr(n,t,3);var r,e,u=0>this.dir;return this.filter(function(t,o,i){return r=r&&(u?o<e:o>e),e=o,r||(r=!n(t,o,i))})},ee.prototype.reject=function(n,t){return n=Cr(n,t,3),this.filter(function(t,r,e){return!n(t,r,e)
+})},ee.prototype.slice=function(n,t){n=null==n?0:+n||0;var r=0>n?this.takeRight(-n):this.drop(n);return typeof t!="undefined"&&(t=+t||0,r=0>t?r.dropRight(-t):r.take(t-n)),r},or(ee.prototype,function(n,t){var r=/^(?:first|last)$/.test(t);Wt.prototype[t]=function(){var e=arguments,u=this.__chain__,o=this.__wrapped__,i=o instanceof ee;return r&&!u?i?n.apply(o,e):(u=[this.value()],ju.apply(u,e),Wt[t].apply(Wt,u)):i||uo(o)?(o=n.apply(i?o:new ee(this),e),new re(o,u)):this.thru(function(n){return n=[n],ju.apply(n,e),Wt[t].apply(Wt,n)
+})}}),n("concat join pop push shift sort splice unshift".split(" "),function(n){var t=lu[n],r=/^(?:push|sort|unshift)$/.test(n)?"tap":"thru",e=/^(?:join|pop|shift)$/.test(n);Wt.prototype[n]=function(){var n=arguments;return e&&!this.__chain__?t.apply(this.value(),n):this[r](function(r){return t.apply(r,n)})}}),ee.prototype.clone=function(){var n=new ee(this.wrapped);return n.dir=this.dir,n.dropCount=this.dropCount,n.filtered=this.filtered,n.takeCount=this.takeCount,ju.apply(n.iteratees,this.iteratees),ju.apply(n.views,this.views),n
+},ee.prototype.reverse=function(){var n=this.filtered,t=n?new ee(this):this.clone();return t.dir=-1*this.dir,t.filtered=n,t},ee.prototype.value=function(){for(var n=this.wrapped.value(),t=n.length,r=0,e=t,u=this.views,o=-1,i=u.length;++o<i;){var f=u[o],a=f.size;switch(f.type){case"drop":r+=a;break;case"dropRight":e-=a;break;case"take":e=Nu(e,r+a);break;case"takeRight":r=Wu(r,e-a)}}var u=this.dir,o=this.dropCount,i=0,f=!o,a=Nu(e-r,this.takeCount-o),l=0>u,r=l?e:r-1,e=this.iteratees,c=e.length,p=0,s=[];
+n:for(;t--&&p<a;){for(var h=-1,g=n[r+=u];++h<c;){var v=e[h],y=v.iteratee(g,r,n),v=v.type;if(v==B)g=y;else if(!y){if(v==z)continue n;break n}}f?s[p++]=g:f=++i>=o}return l?s.reverse():s},Wt.prototype.chain=function(){return te(this)},Wt.prototype.reverse=function(){return this.thru(function(n){return n.reverse()})},Wt.prototype.toString=function(){return fu(this.value())},Wt.prototype.toJSON=Wt.prototype.value=Wt.prototype.valueOf=function(){var n=this.__wrapped__;n instanceof ee&&(n=n.value());for(var t=-1,r=this.__queue__,e=r.length;++t<e;){var n=[n],u=r[t],o=u.object;
+ju.apply(n,u.args),n=o[u.name].apply(o,n)}return n},Wt.prototype.collect=Wt.prototype.map,Wt.prototype.head=Wt.prototype.first,Wt.prototype.select=Wt.prototype.filter,Wt.prototype.tail=Wt.prototype.rest,Wt}var O,R="3.0.0-pre",F=1,C=2,D=4,S=8,T=16,W=32,N=64,U=30,$="...",q=150,L=16,z=1,B=2,M="Expected a function",P="__lodash_placeholder__",K=0,V=/\b__p\+='';/g,Y=/\b(__p\+=)''\+/g,Z=/(__e\(.*?\)|\b__t\))\+'';/g,G=/&(?:amp|lt|gt|quot|#39|#96);/g,J=/[&<>"'`]/g,X=/<%-([\s\S]+?)%>/g,H=/<%([\s\S]+?)%>/g,Q=/<%=([\s\S]+?)%>/g,nt=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,tt=/\w*$/,rt=/^\s*function[ \n\r\t]+\w/,et=/^0[xX]/,ut=/^\[object .+?Constructor\]$/,ot=/[\xC0-\xD6\xD8-\xDE\xDF-\xF6\xF8-\xFF]/g,it=/($^)/,ft=/[.*+?^${}()|[\]\/\\]/g,at=/\bthis\b/,lt=/['\n\r\u2028\u2029\\]/g,ct=RegExp("[A-Z\\xC0-\\xD6\\xD8-\\xDE]{2,}(?=[A-Z\\xC0-\\xD6\\xD8-\\xDE][a-z\\xDF-\\xF6\\xF8-\\xFF]+)|[A-Z\\xC0-\\xD6\\xD8-\\xDE]?[a-z\\xDF-\\xF6\\xF8-\\xFF]+|[A-Z\\xC0-\\xD6\\xD8-\\xDE]+|[0-9]+","g"),pt=" \t\x0B\f\xa0\ufeff\n\r\u2028\u2029\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000",st="Array ArrayBuffer Date Error Float32Array Float64Array Function Int8Array Int16Array Int32Array Math Number Object RegExp Set String _ clearTimeout document isFinite parseInt setTimeout TypeError Uint8Array Uint8ClampedArray Uint16Array Uint32Array WeakMap window WinRTError".split(" "),ht="[object Arguments]",gt="[object Array]",vt="[object Boolean]",yt="[object Date]",dt="[object Error]",mt="[object Number]",_t="[object Object]",bt="[object RegExp]",wt="[object String]",xt="[object ArrayBuffer]",jt="[object Float32Array]",At="[object Float64Array]",Et="[object Int8Array]",It="[object Int16Array]",kt="[object Int32Array]",Ot="[object Uint8Array]",Rt="[object Uint8ClampedArray]",Ft="[object Uint16Array]",Ct="[object Uint32Array]",Dt={};
+Dt[ht]=Dt[gt]=Dt[jt]=Dt[At]=Dt[Et]=Dt[It]=Dt[kt]=Dt[Ot]=Dt[Rt]=Dt[Ft]=Dt[Ct]=true,Dt[xt]=Dt[vt]=Dt[yt]=Dt[dt]=Dt["[object Function]"]=Dt["[object Map]"]=Dt[mt]=Dt[_t]=Dt[bt]=Dt["[object Set]"]=Dt[wt]=Dt["[object WeakMap]"]=false;var St={};St[ht]=St[gt]=St[xt]=St[vt]=St[yt]=St[jt]=St[At]=St[Et]=St[It]=St[kt]=St[mt]=St[_t]=St[bt]=St[wt]=St[Ot]=St[Rt]=St[Ft]=St[Ct]=true,St[dt]=St["[object Function]"]=St["[object Map]"]=St["[object Set]"]=St["[object WeakMap]"]=false;var Tt={leading:false,maxWait:0,trailing:false},Wt={"\xc0":"A","\xc1":"A","\xc2":"A","\xc3":"A","\xc4":"A","\xc5":"A","\xe0":"a","\xe1":"a","\xe2":"a","\xe3":"a","\xe4":"a","\xe5":"a","\xc7":"C","\xe7":"c","\xd0":"D","\xf0":"d","\xc8":"E","\xc9":"E","\xca":"E","\xcb":"E","\xe8":"e","\xe9":"e","\xea":"e","\xeb":"e","\xcc":"I","\xcd":"I","\xce":"I","\xcf":"I","\xec":"i","\xed":"i","\xee":"i","\xef":"i","\xd1":"N","\xf1":"n","\xd2":"O","\xd3":"O","\xd4":"O","\xd5":"O","\xd6":"O","\xd8":"O","\xf2":"o","\xf3":"o","\xf4":"o","\xf5":"o","\xf6":"o","\xf8":"o","\xd9":"U","\xda":"U","\xdb":"U","\xdc":"U","\xf9":"u","\xfa":"u","\xfb":"u","\xfc":"u","\xdd":"Y","\xfd":"y","\xff":"y","\xc6":"Ae","\xe6":"ae","\xde":"Th","\xfe":"th","\xdf":"ss"},Nt={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;","`":"&#96;"},Ut={"&amp;":"&","&lt;":"<","&gt;":">","&quot;":'"',"&#39;":"'","&#96;":"`"},$t={filter:z,map:B,takeWhile:3},qt={"function":true,object:true},Lt={"\\":"\\","'":"'","\n":"n","\r":"r","\u2028":"u2028","\u2029":"u2029"},zt=qt[typeof window]&&window||this,Bt=qt[typeof exports]&&exports&&!exports.nodeType&&exports,Mt=qt[typeof module]&&module&&!module.nodeType&&module,Pt=Bt&&Mt&&typeof global=="object"&&global;
+!Pt||Pt.global!==Pt&&Pt.window!==Pt&&Pt.self!==Pt||(zt=Pt);var Kt=Mt&&Mt.exports===Bt&&Bt,Vt=k();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(zt._=Vt, define(function(){return Vt})):Bt&&Mt?Kt?(Mt.exports=Vt)._=Vt:Bt._=Vt:zt._=Vt}).call(this);
\ No newline at end of file
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 6f98fc92e..1c579c033 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -26,20 +26,9 @@
       CURRY_BOUND_FLAG = 16,
       PARTIAL_FLAG = 32;
 
-  /** Used as the TypeError message for "Functions" methods */
+  /** Used as the `TypeError` message for "Functions" methods */
   var FUNC_ERROR_TEXT = 'Expected a function';
 
-  /** Used as references for the max length and index of an array */
-  var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
-      MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
-
-  /**
-   * Used as the maximum length of an array-like value.
-   * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
-   * for more details.
-   */
-  var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
-
   /** Used as the internal argument placeholder */
   var PLACEHOLDER = '__lodash_placeholder__';
 
@@ -224,26 +213,6 @@
     return true;
   }
 
-  /**
-   * A specialized version of `_.map` for arrays without support for callback
-   * shorthands or `this` binding.
-   *
-   * @private
-   * @param {Array} array The array to iterate over.
-   * @param {Function} iteratee The function invoked per iteration.
-   * @returns {Array} Returns the new mapped array.
-   */
-  function arrayMap(array, iteratee) {
-    var index = -1,
-        length = array.length,
-        result = Array(length);
-
-    while (++index < length) {
-      result[index] = iteratee(array[index], index, array);
-    }
-    return result;
-  }
-
   /**
    * A specialized version of `_.filter` for arrays without support for callback
    * shorthands or `this` binding.
@@ -268,6 +237,26 @@
     return result;
   }
 
+  /**
+   * A specialized version of `_.map` for arrays without support for callback
+   * shorthands or `this` binding.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   */
+  function arrayMap(array, iteratee) {
+    var index = -1,
+        length = array.length,
+        result = Array(length);
+
+    while (++index < length) {
+      result[index] = iteratee(array[index], index, array);
+    }
+    return result;
+  }
+
   /**
    * A specialized version of `_.reduce` for arrays without support for callback
    * shorthands or `this` binding.
@@ -374,9 +363,6 @@
    * @returns {number} Returns the index of the matched value, else `-1`.
    */
   function baseIndexOf(array, value, fromIndex) {
-    if (value !== value) {
-      return indexOfNaN(array, fromIndex);
-    }
     var index = (fromIndex || 0) - 1,
         length = array.length;
 
@@ -443,29 +429,6 @@
     return '\\' + stringEscapes[chr];
   }
 
-  /**
-   * Gets the index at which the first occurrence of `NaN` is found in `array`.
-   * If `fromRight` is provided elements of `array` are iterated from right to left.
-   *
-   * @private
-   * @param {Array} array The array to search.
-   * @param {number} [fromIndex] The index to search from.
-   * @param {boolean} [fromRight=false] Specify iterating from right to left.
-   * @returns {number} Returns the index of the matched `NaN`, else `-1`.
-   */
-  function indexOfNaN(array, fromIndex, fromRight) {
-    var length = array.length,
-        index = fromRight ? (fromIndex || length) : ((fromIndex || 0) - 1);
-
-    while ((fromRight ? index-- : ++index < length)) {
-      var other = array[index];
-      if (other !== other) {
-        return index;
-      }
-    }
-    return -1;
-  }
-
   /**
    * Checks if the provided arguments are from an iteratee call.
    *
@@ -587,6 +550,21 @@
       nativeNow = isNative(nativeNow = Date.now) && nativeNow,
       nativeRandom = Math.random;
 
+  /** Used as references for `-Infinity` and `Infinity` */
+  var NEGATIVE_INFINITY = Number.NEGATIVE_INFINITY,
+      POSITIVE_INFINITY = Number.POSITIVE_INFINITY;
+
+  /** Used as references for the max length and index of an array */
+  var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
+      MAX_ARRAY_INDEX =  MAX_ARRAY_LENGTH - 1;
+
+  /**
+   * Used as the maximum length of an array-like value.
+   * See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+   * for more details.
+   */
+  var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
+
   /*------------------------------------------------------------------------*/
 
   /**
@@ -660,21 +638,7 @@
   function lodash(value) {
     return (value instanceof lodash)
       ? value
-      : new lodashWrapper(value);
-  }
-
-  /**
-   * A fast path for creating `lodash` wrapper objects.
-   *
-   * @private
-   * @param {*} value The value to wrap in a `lodash` instance.
-   * @param {boolean} [chainAll=false] Enable chaining for all methods.
-   * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
-   * @returns {Object} Returns a `lodash` instance.
-   */
-  function lodashWrapper(value, chainAll) {
-    this.__chain__ = !!chainAll;
-    this.__wrapped__ = value;
+      : new LodashWrapper(value);
   }
 
   /**
@@ -752,6 +716,48 @@
 
   /*------------------------------------------------------------------------*/
 
+  /**
+   * A specialized version of `_.max` for arrays without support for iteratees.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @returns {*} Returns the maximum value.
+   */
+  function arrayMax(array) {
+    var index = -1,
+        length = array.length,
+        result = NEGATIVE_INFINITY;
+
+    while (++index < length) {
+      var value = array[index];
+      if (value > result) {
+        result = value;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * A specialized version of `_.min` for arrays without support for iteratees.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @returns {*} Returns the minimum value.
+   */
+  function arrayMin(array) {
+    var index = -1,
+        length = array.length,
+        result = POSITIVE_INFINITY;
+
+    while (++index < length) {
+      var value = array[index];
+      if (value < result) {
+        result = value;
+      }
+    }
+    return result;
+  }
+
   /**
    * The base implementation of `_.assign` without support for argument juggling,
    * multiple sources, and `this` binding.
@@ -801,7 +807,7 @@
    * "_.pluck" and "_.where" style callbacks.
    *
    * @private
-   * @param {*} [func=identity] The value to convert to a callback.
+   * @param {*} [func=_.identity] The value to convert to a callback.
    * @param {*} [thisArg] The `this` binding of the created callback.
    * @param {number} [argCount] The number of arguments the callback accepts.
    * @returns {Function} Returns the new function.
@@ -960,8 +966,8 @@
   }
 
   /**
-   * The base implementation of `_.filter` without support for callback shorthands
-   * or `this` binding.
+   * The base implementation of `_.filter` without support for callback
+   * shorthands or `this` binding.
    *
    * @private
    * @param {Array|Object|string} collection The collection to iterate over.
@@ -1330,6 +1336,7 @@
    * @param {Function} func The function to partially apply arguments to.
    * @param {number} bitmask The bitmask of flags to compose.
    * @param {Array} args The arguments to be partially applied.
+   * @param {Array} holders The `args` placeholder indexes.
    * @param {*} [thisArg] The `this` binding of `func`.
    * @returns {Function} Returns the new partially applied function.
    */
@@ -1566,7 +1573,7 @@
    * @private
    * @param {Function} func The function to bind.
    * @param {*} [thisArg] The `this` binding of `func`.
-   * @returns {Function} Returns the new wrapped function.
+   * @returns {Function} Returns the new bound function.
    */
   function createBindWrapper(func, thisArg) {
     var Ctor = createCtorWrapper(func);
@@ -1583,7 +1590,7 @@
    *
    * @private
    * @param {Function} Ctor The constructor to wrap.
-   * @returns {Function} Returns the new function.
+   * @returns {Function} Returns the new wrapped function.
    */
   function createCtorWrapper(Ctor) {
     return function() {
@@ -1609,7 +1616,7 @@
    * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
    * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
    * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-   * @returns {Function} Returns the new function.
+   * @returns {Function} Returns the new wrapped function.
    */
   function createHybridWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
     var isBind = bitmask & BIND_FLAG,
@@ -1695,7 +1702,7 @@
    * @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
    * @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
    * @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
-   * @returns {Function} Returns the new function.
+   * @returns {Function} Returns the new wrapped function.
    */
   function createWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
     var isBindKey = bitmask & BIND_KEY_FLAG;
@@ -1868,8 +1875,9 @@
    * Creates an array excluding all values of the provided arrays using
    * `SameValueZero` for equality comparisons.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -1938,7 +1946,7 @@
    * @memberOf _
    * @category Array
    * @param {Array} array The array to search.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -2032,8 +2040,9 @@
    * it is used as the offset from the end of the collection. If `array` is
    * sorted providing `true` for `fromIndex` performs a faster binary search.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2065,8 +2074,10 @@
     if (typeof fromIndex == 'number') {
       fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
     } else if (fromIndex) {
-      var index = sortedIndex(array, value);
-      return array[index] === value ? index : -1;
+      var index = sortedIndex(array, value),
+          other = array[index];
+
+      return value === other ? index : -1;
     }
     return baseIndexOf(array, value, fromIndex);
   }
@@ -2097,8 +2108,9 @@
    * Creates an array of unique values present in all provided arrays using
    * `SameValueZero` for equality comparisons.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2201,9 +2213,6 @@
     if (typeof fromIndex == 'number') {
       index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1;
     }
-    if (value !== value) {
-      return indexOfNaN(array, index, true);
-    }
     while (index--) {
       if (array[index] === value) {
         return index;
@@ -2297,7 +2306,7 @@
    * @category Array
    * @param {Array} array The array to inspect.
    * @param {*} value The value to evaluate.
-   * @param {Function|Object|string} [iteratee=identity] The function invoked
+   * @param {Function|Object|string} [iteratee=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -2359,8 +2368,9 @@
    * Creates an array of unique values, in order, of the provided arrays using
    * `SameValueZero` for equality comparisons.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2392,8 +2402,9 @@
    * returns `true` for elements that have the properties of the given object,
    * else `false`.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2476,8 +2487,9 @@
    * Creates an array excluding all provided values using `SameValueZero` for
    * equality comparisons.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2530,25 +2542,25 @@
    * @alias object
    * @category Array
    * @param {Array} props The property names.
-   * @param {Array} [vals=[]] The property values.
+   * @param {Array} [values=[]] The property values.
    * @returns {Object} Returns the new object.
    * @example
    *
    * _.zipObject(['fred', 'barney'], [30, 40]);
    * // => { 'fred': 30, 'barney': 40 }
    */
-  function zipObject(props, vals) {
+  function zipObject(props, values) {
     var index = -1,
         length = props ? props.length : 0,
         result = {};
 
-    if (!vals && length && !isArray(props[0])) {
-      vals = [];
+    if (!values && length && !isArray(props[0])) {
+      values = [];
     }
     while (++index < length) {
       var key = props[index];
-      if (vals) {
-        result[key] = vals[index];
+      if (values) {
+        result[key] = values[index];
       } else if (key) {
         result[key[0]] = key[1];
       }
@@ -2566,7 +2578,7 @@
    * @memberOf _
    * @category Chain
    * @param {*} value The value to wrap.
-   * @returns {Object} Returns the new wrapper object.
+   * @returns {Object} Returns the new `LodashWrapper` object.
    * @example
    *
    * var users = [
@@ -2614,13 +2626,29 @@
     return value;
   }
 
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * A fast path for creating `lodash` wrapper objects.
+   *
+   * @private
+   * @param {*} value The value to wrap.
+   * @param {boolean} [chainAll=false] Enable chaining for all methods.
+   * @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
+   * @returns {Object} Returns a `LodashWrapper` instance.
+   */
+  function LodashWrapper(value, chainAll) {
+    this.__chain__ = !!chainAll;
+    this.__wrapped__ = value;
+  }
+
   /**
    * Enables explicit method chaining on the wrapper object.
    *
    * @name chain
    * @memberOf _
    * @category Chain
-   * @returns {*} Returns the wrapper object.
+   * @returns {*} Returns the `LodashWrapper` object.
    * @example
    *
    * var users = [
@@ -2663,12 +2691,13 @@
   /*------------------------------------------------------------------------*/
 
   /**
-   * Checks if `value` is present in `collection` using  `SameValueZero` for
+   * Checks if `value` is present in `collection` using `SameValueZero` for
    * equality comparisons. If `fromIndex` is negative, it is used as the offset
    * from the end of the collection.
    *
-   * **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
-   * `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+   * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+   * e.g. `===`, except that `NaN` matches `NaN`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
    * for more details.
    *
    * @static
@@ -2721,7 +2750,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee=identity] The function invoked
+   * @param {Function|Object|string} [iteratee=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -2758,7 +2787,7 @@
    * @alias all
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -2807,7 +2836,7 @@
    * @alias select
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -2854,7 +2883,7 @@
    * @alias detect
    * @category Collection
    * @param {Array|Object|string} collection The collection to search.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -2932,7 +2961,7 @@
    * @alias each
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function} [iteratee=identity] The function invoked per iteration.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {Array|Object|string} Returns `collection`.
    * @example
@@ -2967,7 +2996,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee=identity] The function invoked
+   * @param {Function|Object|string} [iteratee=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3010,7 +3039,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee=identity] The function invoked
+   * @param {Function|Object|string} [iteratee=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3078,7 +3107,7 @@
    * @alias collect
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee=identity] The function invoked
+   * @param {Function|Object|string} [iteratee=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3151,33 +3180,25 @@
    * // => { 'user': 'fred', 'age': 40 };
    */
   function max(collection, iteratee, thisArg) {
-    iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-    var computed = -Infinity,
-        result = computed;
+    if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+      iteratee = null;
+    }
 
     if (iteratee == null) {
-      var index = -1,
-          iterable = toIterable(collection),
-          length = iterable.length;
-
-      while (++index < length) {
-        var value = iterable[index];
-        if (value > result) {
-          result = value;
-        }
-      }
-    } else {
-      iteratee = baseCallback(iteratee, thisArg, 3);
-
-      baseEach(collection, function(value, index, collection) {
-        var current = iteratee(value, index, collection);
-        if (current > computed || (current === -Infinity && current === result)) {
-          computed = current;
-          result = value;
-        }
-      });
+      return arrayMax(isArray(collection) ? collection : toIterable(collection));
     }
+    var computed = NEGATIVE_INFINITY,
+        result = computed;
+
+    iteratee = baseCallback(iteratee, thisArg, 3);
+
+    baseEach(collection, function(value, index, collection) {
+      var current = iteratee(value, index, collection);
+      if (current > computed || (current === NEGATIVE_INFINITY && current === result)) {
+        computed = current;
+        result = value;
+      }
+    });
     return result;
   }
 
@@ -3225,33 +3246,25 @@
    * // => { 'user': 'barney', 'age': 36 };
    */
   function min(collection, iteratee, thisArg) {
-    iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
-    var computed = Infinity,
-        result = computed;
+    if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+      iteratee = null;
+    }
 
     if (iteratee == null) {
-      var index = -1,
-          iterable = toIterable(collection),
-          length = iterable.length;
-
-      while (++index < length) {
-        var value = iterable[index];
-        if (value < result) {
-          result = value;
-        }
-      }
-    } else {
-      iteratee = baseCallback(iteratee, thisArg, 3);
-
-      baseEach(collection, function(value, index, collection) {
-        var current = iteratee(value, index, collection);
-        if (current < computed || (current === Infinity && current === result)) {
-          computed = current;
-          result = value;
-        }
-      });
+      return arrayMin(isArray(collection) ? collection : toIterable(collection));
     }
+    var computed = POSITIVE_INFINITY,
+        result = computed;
+
+    iteratee = baseCallback(iteratee, thisArg, 3);
+
+    baseEach(collection, function(value, index, collection) {
+      var current = iteratee(value, index, collection);
+      if (current < computed || (current === POSITIVE_INFINITY && current === result)) {
+        computed = current;
+        result = value;
+      }
+    });
     return result;
   }
 
@@ -3272,7 +3285,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3343,7 +3356,7 @@
    * @alias foldl, inject
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function} [iteratee=identity] The function invoked per iteration.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
    * @param {*} [accumulator] The initial value.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {*} Returns the accumulated value.
@@ -3372,7 +3385,7 @@
    * @alias foldr
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function} [iteratee=identity] The function invoked per iteration.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
    * @param {*} [accumulator] The initial value.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {*} Returns the accumulated value.
@@ -3402,7 +3415,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3540,7 +3553,7 @@
    * @alias any
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [predicate=identity] The function invoked
+   * @param {Function|Object|string} [predicate=_.identity] The function invoked
    *  per iteration. If a property name or object is provided it is used to
    *  create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `predicate`.
@@ -3593,7 +3606,7 @@
    * @memberOf _
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Array|Function|Object|string} [iteratee=identity] The function
+   * @param {Array|Function|Object|string} [iteratee=_.identity] The function
    *  invoked per iteration. If property name(s) or an object is provided it
    *  is used to create a "_.pluck" or "_.where" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
@@ -3622,8 +3635,9 @@
    * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
    */
   function sortBy(collection, iteratee, thisArg) {
-    iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
-
+    if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
+      iteratee = null;
+    }
     var index = -1,
         length = collection ? collection.length : 0,
         result = [];
@@ -4117,9 +4131,16 @@
    * Creates a function that memoizes the result of `func`. If `resolver` is
    * provided it determines the cache key for storing the result based on the
    * arguments provided to the memoized function. By default, the first argument
-   * provided to the memoized function is used as the cache key. The `func` is
-   * invoked with the `this` binding of the memoized function. The result cache
-   * is exposed as the `cache` property on the memoized function.
+   * provided to the memoized function is coerced to a string and used as the
+   * cache key. The `func` is invoked with the `this` binding of the memoized
+   * function.
+   *
+   * **Note:** The cache is exposed as the `cache` property on the memoized
+   * function. Its creation may be customized by replacing the `_.memoize.Cache`
+   * constructor with one whose instances implement the ES6 `Map` method interface
+   * of `get`, `has`, and `set`. See the
+   * [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-properties-of-the-map-prototype-object)
+   * for more details.
    *
    * @static
    * @memberOf _
@@ -4144,7 +4165,7 @@
    * upperCase('fred');
    * // => 'FRED'
    *
-   * upperCase.cache.fred = 'BARNEY'
+   * upperCase.cache.set('fred, 'BARNEY');
    * upperCase('fred');
    * // => 'BARNEY'
    */
@@ -4212,7 +4233,7 @@
    * initialize();
    * // `initialize` invokes `createApplication` once
    */
-  var once = partial(before, 2);
+  var once = basePartial(before,PARTIAL_FLAG, [2], []);
 
   /**
    * Creates a function that invokes `func` with `partial` arguments prepended
@@ -4334,10 +4355,11 @@
    * cloning is handled by the method instead. The `customizer` is bound to
    * `thisArg` and invoked with two argument; (value, index|key).
    *
-   * **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 the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
+   * **Note:** This method is loosely based on the structured clone algorithm.
+   * The enumerable properties of `arguments` objects and objects created by
+   * constructors other than `Object` are cloned to plain `Object` objects. An
+   * empty object is returned for uncloneable values such as functions, DOM nodes,
+   * Maps, Sets, and WeakMaps. See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
    * for more details.
    *
    * @static
@@ -4386,7 +4408,7 @@
    * @memberOf _
    * @category Lang
    * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
    * @example
    *
    * (function() { return _.isArguments(arguments); })();
@@ -4886,7 +4908,7 @@
         index = 0,
         length = args.length;
 
-    if (isIterateeCall(args[1], args[2], args[3])) {
+    if (length > 3 && isIterateeCall(args[1], args[2], args[3])) {
       length = 2;
     }
     while (++index < length) {
@@ -4922,7 +4944,7 @@
         index = 0,
         length = args.length;
 
-    if (isIterateeCall(args[1], args[2], args[3])) {
+    if (length > 3 && isIterateeCall(args[1], args[2], args[3])) {
       length = 2;
     }
     while (++index < length) {
@@ -4964,7 +4986,7 @@
    * @category Object
    * @param {Object} object The object to inspect.
    * @param {string} key The name of the property to check.
-   * @returns {boolean} Returns `true` if key is a direct property, else `false`.
+   * @returns {boolean} Returns `true` if `key` is a direct property, else `false`.
    * @example
    *
    * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
@@ -5465,7 +5487,7 @@
    * @memberOf _
    * @alias iteratee
    * @category Utility
-   * @param {*} [func=identity] The value to convert to a callback.
+   * @param {*} [func=_.identity] The value to convert to a callback.
    * @param {*} [thisArg] The `this` binding of the created callback.
    * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
    * @returns {Function} Returns the new function.
@@ -5630,7 +5652,7 @@
           push.apply(args, arguments);
 
           var result = func.apply(lodash, args);
-          return this.__chain__ ? new lodashWrapper(result, true) : result;
+          return this.__chain__ ? new LodashWrapper(result, true) : result;
         };
       }());
     }
@@ -5759,7 +5781,7 @@
 
   /**
    * Creates an array of numbers (positive and/or negative) progressing from
-   * `start` up to but not including `end`. If `start` is less than `stop` a
+   * `start` up to but not including `end`. If `start` is less than `end` a
    * zero-length range is created unless a negative `step` is specified.
    *
    * @static
@@ -5864,7 +5886,7 @@
    * @memberOf _
    * @category Utility
    * @param {number} n The number of times to invoke `iteratee`.
-   * @param {Function} [iteratee=identity] The function invoked per iteration.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {Array} Returns the array of results.
    * @example
@@ -5918,6 +5940,9 @@
 
   /*------------------------------------------------------------------------*/
 
+  // ensure `new LodashWrapper` is an instance of `lodash`
+  LodashWrapper.prototype = lodash.prototype;
+
   // add functions that return wrapped values when chaining
   lodash.after = after;
   lodash.before = before;
@@ -6063,17 +6088,10 @@
    */
   lodash.VERSION = VERSION;
 
-  // ensure `new lodashWrapper` is an instance of `lodash`
-  lodashWrapper.prototype = lodash.prototype;
-
-  // add "Chaining" functions to the wrapper
-  lodash.prototype.chain = wrapperChain;
-  lodash.prototype.value = wrapperValueOf;
-
   // assign default placeholders
   partial.placeholder = lodash;
 
-  // add `Array.prototype` functions
+  // add `Array.prototype` functions to `LodashWrapper`
   arrayEach(['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
     var func = arrayProto[methodName],
         retValue = !/^(?:concat|join|slice)$/.test(methodName),
@@ -6091,10 +6109,16 @@
       if (retValue) {
         result = value;
       }
-      return this.__chain__ ? new lodashWrapper(result, true) : result;
+      return this.__chain__ ? new LodashWrapper(result, true) : result;
     };
   });
 
+  // add chaining functions to the lodash wrapper
+  lodash.prototype.chain = wrapperChain;
+  lodash.prototype.value = wrapperValueOf;
+
+  lodash.prototype.tail = lodash.prototype.rest;
+
   /*--------------------------------------------------------------------------*/
 
   // some AMD build optimizers like r.js check for condition patterns like the following:
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 7f368f0cf..e6104f16e 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -3,45 +3,44 @@
  * Lo-Dash 3.0.0-pre (Custom Build) lodash.com/license | Underscore.js 1.7.0 underscorejs.org/LICENSE
  * Build: `lodash underscore -o ./dist/lodash.underscore.js`
  */
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