Bump to v3.5.0.

LICENSE.txt

@@ -1,5 +1,5 @@
 Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
-Based on Underscore.js 1.7.0, copyright 2009-2015 Jeremy Ashkenas,
+Based on Underscore.js, copyright 2009-2015 Jeremy Ashkenas,
 DocumentCloud and Investigative Reporters & Editors <http://underscorejs.org/>
 
 Permission is hereby granted, free of charge, to any person obtaining

README.md

@@ -1,4 +1,4 @@
-# lodash v3.2.0
+# lodash v3.5.0
 
 The [modern build](https://github.com/lodash/lodash/wiki/Build-Differences) of [lodash](https://lodash.com/) exported as [AMD](https://github.com/amdjs/amdjs-api/wiki/AMD) modules.
 

array/difference.js

@@ -17,20 +17,21 @@ define(['../internal/baseDifference', '../internal/baseFlatten', '../lang/isArgu
    * @returns {Array} Returns the new array of filtered values.
    * @example
    *
-   * _.difference([1, 2, 3], [5, 2, 10]);
+   * _.difference([1, 2, 3], [4, 2]);
    * // => [1, 3]
    */
   function difference() {
-    var index = -1,
-        length = arguments.length;
+    var args = arguments,
+        index = -1,
+        length = args.length;
 
     while (++index < length) {
-      var value = arguments[index];
+      var value = args[index];
       if (isArray(value) || isArguments(value)) {
         break;
       }
     }
-    return baseDifference(value, baseFlatten(arguments, false, true, ++index));
+    return baseDifference(value, baseFlatten(args, false, true, ++index));
   }
 
   return difference;

array/dropRightWhile.js

@@ -26,7 +26,9 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * @returns {Array} Returns the slice of `array`.
    * @example
    *
-   * _.dropRightWhile([1, 2, 3], function(n) { return n > 1; });
+   * _.dropRightWhile([1, 2, 3], function(n) {
+   *   return n > 1;
+   * });
    * // => [1]
    *
    * var users = [
@@ -36,7 +38,7 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * ];
    *
    * // using the `_.matches` callback shorthand
-   * _.pluck(_.dropRightWhile(users, { 'user': pebbles, 'active': false }), 'user');
+   * _.pluck(_.dropRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user');
    * // => ['barney', 'fred']
    *
    * // using the `_.matchesProperty` callback shorthand

array/dropWhile.js

@@ -26,7 +26,9 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * @returns {Array} Returns the slice of `array`.
    * @example
    *
-   * _.dropWhile([1, 2, 3], function(n) { return n < 3; });
+   * _.dropWhile([1, 2, 3], function(n) {
+   *   return n < 3;
+   * });
    * // => [3]
    *
    * var users = [

array/findIndex.js

@@ -31,7 +31,9 @@ define(['../internal/baseCallback'], function(baseCallback) {
    *   { 'user': 'pebbles', 'active': true }
    * ];
    *
-   * _.findIndex(users, function(chr) { return chr.user == 'barney'; });
+   * _.findIndex(users, function(chr) {
+   *   return chr.user == 'barney';
+   * });
    * // => 0
    *
    * // using the `_.matches` callback shorthand

array/findLastIndex.js

@@ -31,16 +31,18 @@ define(['../internal/baseCallback'], function(baseCallback) {
    *   { 'user': 'pebbles', 'active': false }
    * ];
    *
-   * _.findLastIndex(users, function(chr) { return chr.user == 'pebbles'; });
+   * _.findLastIndex(users, function(chr) {
+   *   return chr.user == 'pebbles';
+   * });
    * // => 2
    *
    * // using the `_.matches` callback shorthand
-   * _.findLastIndex(users, { user': 'barney', 'active': true });
+   * _.findLastIndex(users, { 'user': 'barney', 'active': true });
    * // => 0
    *
    * // using the `_.matchesProperty` callback shorthand
    * _.findLastIndex(users, 'active', false);
-   * // => 1
+   * // => 2
    *
    * // using the `_.property` callback shorthand
    * _.findLastIndex(users, 'active');

array/flatten.js

@@ -13,11 +13,11 @@ define(['../internal/baseFlatten', '../internal/isIterateeCall'], function(baseF
    * @returns {Array} Returns the new flattened array.
    * @example
    *
-   * _.flatten([1, [2], [3, [[4]]]]);
-   * // => [1, 2, 3, [[4]]];
+   * _.flatten([1, [2, 3, [4]]]);
+   * // => [1, 2, 3, [4]];
    *
    * // using `isDeep`
-   * _.flatten([1, [2], [3, [[4]]]], true);
+   * _.flatten([1, [2, 3, [4]]], true);
    * // => [1, 2, 3, 4];
    */
   function flatten(array, isDeep, guard) {
@@ -25,7 +25,7 @@ define(['../internal/baseFlatten', '../internal/isIterateeCall'], function(baseF
     if (guard && isIterateeCall(array, isDeep, guard)) {
       isDeep = false;
     }
-    return length ? baseFlatten(array, isDeep) : [];
+    return length ? baseFlatten(array, isDeep, false, 0) : [];
   }
 
   return flatten;

array/flattenDeep.js

@@ -10,12 +10,12 @@ define(['../internal/baseFlatten'], function(baseFlatten) {
    * @returns {Array} Returns the new flattened array.
    * @example
    *
-   * _.flattenDeep([1, [2], [3, [[4]]]]);
+   * _.flattenDeep([1, [2, 3, [4]]]);
    * // => [1, 2, 3, 4];
    */
   function flattenDeep(array) {
     var length = array ? array.length : 0;
-    return length ? baseFlatten(array, true) : [];
+    return length ? baseFlatten(array, true, false, 0) : [];
   }
 
   return flattenDeep;

array/indexOf.js

@@ -24,15 +24,15 @@ define(['../internal/baseIndexOf', '../internal/binaryIndex'], function(baseInde
    * @returns {number} Returns the index of the matched value, else `-1`.
    * @example
    *
-   * _.indexOf([1, 2, 3, 1, 2, 3], 2);
+   * _.indexOf([1, 2, 1, 2], 2);
    * // => 1
    *
    * // using `fromIndex`
-   * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
-   * // => 4
+   * _.indexOf([1, 2, 1, 2], 2, 2);
+   * // => 3
    *
    * // performing a binary search
-   * _.indexOf([4, 4, 5, 5, 6, 6], 5, true);
+   * _.indexOf([1, 1, 2, 2], 2, true);
    * // => 2
    */
   function indexOf(array, value, fromIndex) {
@@ -41,14 +41,17 @@ define(['../internal/baseIndexOf', '../internal/binaryIndex'], function(baseInde
       return -1;
     }
     if (typeof fromIndex == 'number') {
-      fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
+      fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
     } else if (fromIndex) {
       var index = binaryIndex(array, value),
           other = array[index];
 
-      return (value === value ? value === other : other !== other) ? index : -1;
+      if (value === value ? (value === other) : (other !== other)) {
+        return index;
+      }
+      return -1;
     }
-    return baseIndexOf(array, value, fromIndex);
+    return baseIndexOf(array, value, fromIndex || 0);
   }
 
   return indexOf;

array/intersection.js

@@ -15,9 +15,8 @@ define(['../internal/baseIndexOf', '../internal/cacheIndexOf', '../internal/crea
    * @param {...Array} [arrays] The arrays to inspect.
    * @returns {Array} Returns the new array of shared values.
    * @example
-   *
-   * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
-   * // => [1, 2]
+   * _.intersection([1, 2], [4, 2], [2, 1]);
+   * // => [2]
    */
   function intersection() {
     var args = [],
@@ -31,7 +30,7 @@ define(['../internal/baseIndexOf', '../internal/cacheIndexOf', '../internal/crea
       var value = arguments[argsIndex];
       if (isArray(value) || isArguments(value)) {
         args.push(value);
-        caches.push(isCommon && value.length >= 120 && createCache(argsIndex && value));
+        caches.push((isCommon && value.length >= 120) ? createCache(argsIndex && value) : null);
       }
     }
     argsLength = args.length;
@@ -44,11 +43,11 @@ define(['../internal/baseIndexOf', '../internal/cacheIndexOf', '../internal/crea
     outer:
     while (++index < length) {
       value = array[index];
-      if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value)) < 0) {
+      if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value, 0)) < 0) {
         argsIndex = argsLength;
         while (--argsIndex) {
           var cache = caches[argsIndex];
-          if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
+          if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value, 0)) < 0) {
             continue outer;
           }
         }

array/lastIndexOf.js

@@ -18,15 +18,15 @@ define(['../internal/binaryIndex', '../internal/indexOfNaN'], function(binaryInd
    * @returns {number} Returns the index of the matched value, else `-1`.
    * @example
    *
-   * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
-   * // => 4
+   * _.lastIndexOf([1, 2, 1, 2], 2);
+   * // => 3
    *
    * // using `fromIndex`
-   * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
+   * _.lastIndexOf([1, 2, 1, 2], 2, 2);
    * // => 1
    *
    * // performing a binary search
-   * _.lastIndexOf([4, 4, 5, 5, 6, 6], 5, true);
+   * _.lastIndexOf([1, 1, 2, 2], 2, true);
    * // => 3
    */
   function lastIndexOf(array, value, fromIndex) {
@@ -40,7 +40,10 @@ define(['../internal/binaryIndex', '../internal/indexOfNaN'], function(binaryInd
     } else if (fromIndex) {
       index = binaryIndex(array, value, true) - 1;
       var other = array[index];
-      return (value === value ? value === other : other !== other) ? index : -1;
+      if (value === value ? (value === other) : (other !== other)) {
+        return index;
+      }
+      return -1;
     }
     if (value !== value) {
       return indexOfNaN(array, index, true);

array/pull.js

@@ -25,22 +25,25 @@ define(['../internal/baseIndexOf'], function(baseIndexOf) {
    * @example
    *
    * var array = [1, 2, 3, 1, 2, 3];
+   *
    * _.pull(array, 2, 3);
    * console.log(array);
    * // => [1, 1]
    */
   function pull() {
-    var array = arguments[0];
+    var args = arguments,
+        array = args[0];
+
     if (!(array && array.length)) {
       return array;
     }
     var index = 0,
         indexOf = baseIndexOf,
-        length = arguments.length;
+        length = args.length;
 
     while (++index < length) {
       var fromIndex = 0,
-          value = arguments[index];
+          value = args[index];
 
       while ((fromIndex = indexOf(array, value, fromIndex)) > -1) {
         splice.call(array, fromIndex, 1);

array/pullAt.js

@@ -17,7 +17,7 @@ define(['../internal/baseFlatten', '../internal/basePullAt'], function(baseFlatt
    * @example
    *
    * var array = [5, 10, 15, 20];
-   * var evens = _.pullAt(array, [1, 3]);
+   * var evens = _.pullAt(array, 1, 3);
    *
    * console.log(array);
    * // => [5, 15]

array/remove.js

@@ -35,7 +35,9 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * @example
    *
    * var array = [1, 2, 3, 4];
-   * var evens = _.remove(array, function(n) { return n % 2 == 0; });
+   * var evens = _.remove(array, function(n) {
+   *   return n % 2 == 0;
+   * });
    *
    * console.log(array);
    * // => [1, 3]

array/sortedIndex.js

@@ -33,7 +33,7 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    * _.sortedIndex([30, 50], 40);
    * // => 1
    *
-   * _.sortedIndex([4, 4, 5, 5, 6, 6], 5);
+   * _.sortedIndex([4, 4, 5, 5], 5);
    * // => 2
    *
    * var dict = { 'data': { 'thirty': 30, 'forty': 40, 'fifty': 50 } };

array/sortedLastIndex.js

@@ -17,7 +17,7 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    *  into `array`.
    * @example
    *
-   * _.sortedLastIndex([4, 4, 5, 5, 6, 6], 5);
+   * _.sortedLastIndex([4, 4, 5, 5], 5);
    * // => 4
    */
   function sortedLastIndex(array, value, iteratee, thisArg) {

array/takeRightWhile.js

@@ -26,7 +26,9 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * @returns {Array} Returns the slice of `array`.
    * @example
    *
-   * _.takeRightWhile([1, 2, 3], function(n) { return n > 1; });
+   * _.takeRightWhile([1, 2, 3], function(n) {
+   *   return n > 1;
+   * });
    * // => [2, 3]
    *
    * var users = [

array/takeWhile.js

@@ -26,7 +26,9 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * @returns {Array} Returns the slice of `array`.
    * @example
    *
-   * _.takeWhile([1, 2, 3], function(n) { return n < 3; });
+   * _.takeWhile([1, 2, 3], function(n) {
+   *   return n < 3;
+   * });
    * // => [1, 2]
    *
    * var users = [

array/union.js

@@ -16,11 +16,11 @@ define(['../internal/baseFlatten', '../internal/baseUniq'], function(baseFlatten
    * @returns {Array} Returns the new array of combined values.
    * @example
    *
-   * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
-   * // => [1, 2, 3, 5, 4]
+   * _.union([1, 2], [4, 2], [2, 1]);
+   * // => [1, 2, 4]
    */
   function union() {
-    return baseUniq(baseFlatten(arguments, false, true));
+    return baseUniq(baseFlatten(arguments, false, true, 0));
   }
 
   return union;

array/uniq.js

@@ -43,7 +43,9 @@ define(['../internal/baseCallback', '../internal/baseUniq', '../internal/isItera
    * // => [1, 2]
    *
    * // using an iteratee function
-   * _.uniq([1, 2.5, 1.5, 2], function(n) { return this.floor(n); }, Math);
+   * _.uniq([1, 2.5, 1.5, 2], function(n) {
+   *   return this.floor(n);
+   * }, Math);
    * // => [1, 2.5]
    *
    * // using the `_.property` callback shorthand
@@ -55,8 +57,7 @@ define(['../internal/baseCallback', '../internal/baseUniq', '../internal/isItera
     if (!length) {
       return [];
     }
-    // Juggle arguments.
-    if (typeof isSorted != 'boolean' && isSorted != null) {
+    if (isSorted != null && typeof isSorted != 'boolean') {
       thisArg = iteratee;
       iteratee = isIterateeCall(array, isSorted, thisArg) ? null : isSorted;
       isSorted = false;

array/without.js

@@ -17,8 +17,8 @@ define(['../internal/baseDifference', '../internal/baseSlice'], function(baseDif
    * @returns {Array} Returns the new array of filtered values.
    * @example
    *
-   * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
-   * // => [2, 3, 4]
+   * _.without([1, 2, 1, 3], 1, 2);
+   * // => [3]
    */
   function without(array) {
     return baseDifference(array, baseSlice(arguments, 1));

array/xor.js

@@ -12,11 +12,8 @@ define(['../internal/baseDifference', '../internal/baseUniq', '../lang/isArgumen
    * @returns {Array} Returns the new array of values.
    * @example
    *
-   * _.xor([1, 2, 3], [5, 2, 1, 4]);
-   * // => [3, 5, 4]
-   *
-   * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]);
-   * // => [1, 4, 5]
+   * _.xor([1, 2], [4, 2]);
+   * // => [1, 4]
    */
   function xor() {
     var index = -1,

chain/chain.js

@@ -19,7 +19,9 @@ define(['./lodash'], function(lodash) {
    *
    * var youngest = _.chain(users)
    *   .sortBy('age')
-   *   .map(function(chr) { return chr.user + ' is ' + chr.age; })
+   *   .map(function(chr) {
+   *     return chr.user + ' is ' + chr.age;
+   *   })
    *   .first()
    *   .value();
    * // => 'pebbles is 1'

chain/lodash.js

@@ -1,4 +1,4 @@
-define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../lang/isArray', '../internal/isObjectLike', '../internal/wrapperClone'], function(LazyWrapper, LodashWrapper, isArray, isObjectLike, wrapperClone) {
+define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../internal/baseLodash', '../lang/isArray', '../internal/isObjectLike', '../internal/wrapperClone'], function(LazyWrapper, LodashWrapper, baseLodash, isArray, isObjectLike, wrapperClone) {
 
   /** Used for native method references. */
   var objectProto = Object.prototype;
@@ -22,9 +22,14 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../lang/isArray
    * Chaining is supported in custom builds as long as the `_#value` method is
    * directly or indirectly included in the build.
    *
-   * In addition to lodash methods, wrappers also have the following `Array` methods:
-   * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
-   * and `unshift`
+   * In addition to lodash methods, wrappers have `Array` and `String` methods.
+   *
+   * The wrapper `Array` methods are:
+   * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`,
+   * `splice`, and `unshift`
+   *
+   * The wrapper `String` methods are:
+   * `replace` and `split`
    *
    * The wrapper methods that support shortcut fusion are:
    * `compact`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`,
@@ -44,26 +49,26 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../lang/isArray
    * `mixin`, `negate`, `noop`, `omit`, `once`, `pairs`, `partial`, `partialRight`,
    * `partition`, `pick`, `plant`, `pluck`, `property`, `propertyOf`, `pull`,
    * `pullAt`, `push`, `range`, `rearg`, `reject`, `remove`, `rest`, `reverse`,
-   * `shuffle`, `slice`, `sort`, `sortBy`, `sortByAll`, `splice`, `spread`,
-   * `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`,
-   * `thru`, `times`, `toArray`, `toPlainObject`, `transform`, `union`, `uniq`,
-   * `unshift`, `unzip`, `values`, `valuesIn`, `where`, `without`, `wrap`, `xor`,
-   * `zip`, and `zipObject`
+   * `shuffle`, `slice`, `sort`, `sortBy`, `sortByAll`, `sortByOrder`, `splice`,
+   * `spread`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`,
+   * `throttle`, `thru`, `times`, `toArray`, `toPlainObject`, `transform`,
+   * `union`, `uniq`, `unshift`, `unzip`, `values`, `valuesIn`, `where`,
+   * `without`, `wrap`, `xor`, `zip`, and `zipObject`
    *
    * The wrapper methods that are **not** chainable by default are:
-   * `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `deburr`,
+   * `add`, `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `deburr`,
    * `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`,
    * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`,
-   * `identity`, `includes`, `indexOf`, `isArguments`, `isArray`, `isBoolean`,
-   * `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite`,
-   * `isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`,
+   * `identity`, `includes`, `indexOf`, `inRange`, `isArguments`, `isArray`,
+   * `isBoolean`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`,
+   * `isFinite`,`isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`,
    * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`,
    * `isTypedArray`, `join`, `kebabCase`, `last`, `lastIndexOf`, `max`, `min`,
    * `noConflict`, `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`,
    * `random`, `reduce`, `reduceRight`, `repeat`, `result`, `runInContext`,
    * `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, `sortedLastIndex`,
-   * `startCase`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
-   * `trunc`, `unescape`, `uniqueId`, `value`, and `words`
+   * `startCase`, `startsWith`, `sum`, `template`, `trim`, `trimLeft`,
+   * `trimRight`, `trunc`, `unescape`, `uniqueId`, `value`, and `words`
    *
    * The wrapper method `sample` will return a wrapped value when `n` is provided,
    * otherwise an unwrapped value is returned.
@@ -78,11 +83,15 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../lang/isArray
    * var wrapped = _([1, 2, 3]);
    *
    * // returns an unwrapped value
-   * wrapped.reduce(function(sum, n) { return sum + n; });
+   * wrapped.reduce(function(sum, n) {
+   *   return sum + n;
+   * });
    * // => 6
    *
    * // returns a wrapped value
-   * var squares = wrapped.map(function(n) { return n * n; });
+   * var squares = wrapped.map(function(n) {
+   *   return n * n;
+   * });
    *
    * _.isArray(squares);
    * // => false
@@ -102,5 +111,8 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', '../lang/isArray
     return new LodashWrapper(value);
   }
 
+  // Ensure wrappers are instances of `baseLodash`.
+  lodash.prototype = baseLodash.prototype;
+
   return lodash;
 });

chain/tap.js

@@ -16,7 +16,9 @@ define([], function() {
    * @example
    *
    * _([1, 2, 3])
-   *  .tap(function(array) { array.pop(); })
+   *  .tap(function(array) {
+   *    array.pop();
+   *  })
    *  .reverse()
    *  .value();
    * // => [2, 1]

chain/thru.js

@@ -14,7 +14,9 @@ define([], function() {
    *
    * _([1, 2, 3])
    *  .last()
-   *  .thru(function(value) { return [value]; })
+   *  .thru(function(value) {
+   *    return [value];
+   *  })
    *  .value();
    * // => [3]
    */

chain/wrapperPlant.js

@@ -1,4 +1,4 @@
-define(['../internal/LodashWrapper', '../internal/wrapperClone'], function(LodashWrapper, wrapperClone) {
+define(['../internal/baseLodash', '../internal/wrapperClone'], function(baseLodash, wrapperClone) {
 
   /**
    * Creates a clone of the chained sequence planting `value` as the wrapped value.
@@ -27,7 +27,7 @@ define(['../internal/LodashWrapper', '../internal/wrapperClone'], function(Lodas
     var result,
         parent = this;
 
-    while (parent instanceof LodashWrapper) {
+    while (parent instanceof baseLodash) {
       var clone = wrapperClone(parent);
       if (result) {
         previous.__wrapped__ = clone;

collection.js

@@ -1,4 +1,4 @@
-define(['./collection/all', './collection/any', './collection/at', './collection/collect', './collection/contains', './collection/countBy', './collection/detect', './collection/each', './collection/eachRight', './collection/every', './collection/filter', './collection/find', './collection/findLast', './collection/findWhere', './collection/foldl', './collection/foldr', './collection/forEach', './collection/forEachRight', './collection/groupBy', './collection/include', './collection/includes', './collection/indexBy', './collection/inject', './collection/invoke', './collection/map', './collection/max', './collection/min', './collection/partition', './collection/pluck', './collection/reduce', './collection/reduceRight', './collection/reject', './collection/sample', './collection/select', './collection/shuffle', './collection/size', './collection/some', './collection/sortBy', './collection/sortByAll', './collection/where'], function(all, any, at, collect, contains, countBy, detect, each, eachRight, every, filter, find, findLast, findWhere, foldl, foldr, forEach, forEachRight, groupBy, include, includes, indexBy, inject, invoke, map, max, min, partition, pluck, reduce, reduceRight, reject, sample, select, shuffle, size, some, sortBy, sortByAll, where) {
+define(['./collection/all', './collection/any', './collection/at', './collection/collect', './collection/contains', './collection/countBy', './collection/detect', './collection/each', './collection/eachRight', './collection/every', './collection/filter', './collection/find', './collection/findLast', './collection/findWhere', './collection/foldl', './collection/foldr', './collection/forEach', './collection/forEachRight', './collection/groupBy', './collection/include', './collection/includes', './collection/indexBy', './collection/inject', './collection/invoke', './collection/map', './math/max', './math/min', './collection/partition', './collection/pluck', './collection/reduce', './collection/reduceRight', './collection/reject', './collection/sample', './collection/select', './collection/shuffle', './collection/size', './collection/some', './collection/sortBy', './collection/sortByAll', './collection/sortByOrder', './math/sum', './collection/where'], function(all, any, at, collect, contains, countBy, detect, each, eachRight, every, filter, find, findLast, findWhere, foldl, foldr, forEach, forEachRight, groupBy, include, includes, indexBy, inject, invoke, map, max, min, partition, pluck, reduce, reduceRight, reject, sample, select, shuffle, size, some, sortBy, sortByAll, sortByOrder, sum, where) {
   return {
     'all': all,
     'any': any,
@@ -39,6 +39,8 @@ define(['./collection/all', './collection/any', './collection/at', './collection
     'some': some,
     'sortBy': sortBy,
     'sortByAll': sortByAll,
+    'sortByOrder': sortByOrder,
+    'sum': sum,
     'where': where
   };
 });

collection/at.js

@@ -14,8 +14,8 @@ define(['../internal/baseAt', '../internal/baseFlatten', '../internal/isLength',
    * @returns {Array} Returns the new array of picked elements.
    * @example
    *
-   * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
-   * // => ['a', 'c', 'e']
+   * _.at(['a', 'b', 'c'], [0, 2]);
+   * // => ['a', 'c']
    *
    * _.at(['fred', 'barney', 'pebbles'], 0, 2);
    * // => ['fred', 'pebbles']

collection/countBy.js

@@ -34,10 +34,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @returns {Object} Returns the composed aggregate object.
    * @example
    *
-   * _.countBy([4.3, 6.1, 6.4], function(n) { return Math.floor(n); });
+   * _.countBy([4.3, 6.1, 6.4], function(n) {
+   *   return Math.floor(n);
+   * });
    * // => { '4': 1, '6': 2 }
    *
-   * _.countBy([4.3, 6.1, 6.4], function(n) { return this.floor(n); }, Math);
+   * _.countBy([4.3, 6.1, 6.4], function(n) {
+   *   return this.floor(n);
+   * }, Math);
    * // => { '4': 1, '6': 2 }
    *
    * _.countBy(['one', 'two', 'three'], 'length');

collection/filter.js

@@ -27,8 +27,10 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * @returns {Array} Returns the new filtered array.
    * @example
    *
-   * var evens = _.filter([1, 2, 3, 4], function(n) { return n % 2 == 0; });
-   * // => [2, 4]
+   * _.filter([4, 5, 6], function(n) {
+   *   return n % 2 == 0;
+   * });
+   * // => [4, 6]
    *
    * var users = [
    *   { 'user': 'barney', 'age': 36, 'active': true },

collection/find.js

@@ -36,7 +36,9 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseFin
    *   { 'user': 'pebbles', 'age': 1,  'active': true }
    * ];
    *
-   * _.result(_.find(users, function(chr) { return chr.age < 40; }), 'user');
+   * _.result(_.find(users, function(chr) {
+   *   return chr.age < 40;
+   * }), 'user');
    * // => 'barney'
    *
    * // using the `_.matches` callback shorthand

collection/findLast.js

@@ -14,7 +14,9 @@ define(['../internal/baseCallback', '../internal/baseEachRight', '../internal/ba
    * @returns {*} Returns the matched element, else `undefined`.
    * @example
    *
-   * _.findLast([1, 2, 3, 4], function(n) { return n % 2 == 1; });
+   * _.findLast([1, 2, 3, 4], function(n) {
+   *   return n % 2 == 1;
+   * });
    * // => 3
    */
   function findLast(collection, predicate, thisArg) {

collection/forEach.js

@@ -20,10 +20,14 @@ define(['../internal/arrayEach', '../internal/baseEach', '../internal/bindCallba
    * @returns {Array|Object|string} Returns `collection`.
    * @example
    *
-   * _([1, 2, 3]).forEach(function(n) { console.log(n); }).value();
+   * _([1, 2]).forEach(function(n) {
+   *   console.log(n);
+   * }).value();
    * // => logs each value from left to right and returns the array
    *
-   * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(n, key) { console.log(n, key); });
+   * _.forEach({ 'a': 1, 'b': 2 }, function(n, key) {
+   *   console.log(n, key);
+   * });
    * // => logs each value-key pair and returns the object (iteration order is not guaranteed)
    */
   function forEach(collection, iteratee, thisArg) {

collection/forEachRight.js

@@ -14,7 +14,9 @@ define(['../internal/arrayEachRight', '../internal/baseEachRight', '../internal/
    * @returns {Array|Object|string} Returns `collection`.
    * @example
    *
-   * _([1, 2, 3]).forEachRight(function(n) { console.log(n); }).join(',');
+   * _([1, 2]).forEachRight(function(n) {
+   *   console.log(n);
+   * }).join(',');
    * // => logs each value from right to left and returns the array
    */
   function forEachRight(collection, iteratee, thisArg) {

collection/groupBy.js

@@ -34,10 +34,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @returns {Object} Returns the composed aggregate object.
    * @example
    *
-   * _.groupBy([4.2, 6.1, 6.4], function(n) { return Math.floor(n); });
+   * _.groupBy([4.2, 6.1, 6.4], function(n) {
+   *   return Math.floor(n);
+   * });
    * // => { '4': [4.2], '6': [6.1, 6.4] }
    *
-   * _.groupBy([4.2, 6.1, 6.4], function(n) { return this.floor(n); }, Math);
+   * _.groupBy([4.2, 6.1, 6.4], function(n) {
+   *   return this.floor(n);
+   * }, Math);
    * // => { '4': [4.2], '6': [6.1, 6.4] }
    *
    * // using the `_.property` callback shorthand

collection/indexBy.js

@@ -36,10 +36,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * _.indexBy(keyData, 'dir');
    * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
    *
-   * _.indexBy(keyData, function(object) { return String.fromCharCode(object.code); });
+   * _.indexBy(keyData, function(object) {
+   *   return String.fromCharCode(object.code);
+   * });
    * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
    *
-   * _.indexBy(keyData, function(object) { return this.fromCharCode(object.code); }, String);
+   * _.indexBy(keyData, function(object) {
+   *   return this.fromCharCode(object.code);
+   * }, String);
    * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
    */
   var indexBy = createAggregator(function(result, value, key) {

collection/map.js

@@ -37,11 +37,15 @@ define(['../internal/arrayMap', '../internal/baseCallback', '../internal/baseMap
    * @returns {Array} Returns the new mapped array.
    * @example
    *
-   * _.map([1, 2, 3], function(n) { return n * 3; });
-   * // => [3, 6, 9]
+   * function timesThree(n) {
+   *   return n * 3;
+   * }
    *
-   * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(n) { return n * 3; });
-   * // => [3, 6, 9] (iteration order is not guaranteed)
+   * _.map([1, 2], timesThree);
+   * // => [3, 6]
+   *
+   * _.map({ 'a': 1, 'b': 2 }, timesThree);
+   * // => [3, 6] (iteration order is not guaranteed)
    *
    * var users = [
    *   { 'user': 'barney' },

collection/max.js

@@ -1,51 +1,3 @@
-define(['../internal/arrayMax', '../internal/createExtremum'], function(arrayMax, createExtremum) {
-
-  /**
-   * Gets the maximum value of `collection`. If `collection` is empty or falsey
-   * `-Infinity` is returned. If an iteratee function is provided it is invoked
-   * for each value in `collection` to generate the criterion by which the value
-   * is ranked. The `iteratee` is bound to `thisArg` and invoked with three
-   * arguments; (value, index, collection).
-   *
-   * If a property name is provided for `predicate` the created `_.property`
-   * style callback returns the property value of the given element.
-   *
-   * If a value is also provided for `thisArg` the created `_.matchesProperty`
-   * style callback returns `true` for elements that have a matching property
-   * value, else `false`.
-   *
-   * If an object is provided for `predicate` the created `_.matches` style
-   * callback returns `true` for elements that have the properties of the given
-   * object, else `false`.
-   *
-   * @static
-   * @memberOf _
-   * @category Collection
-   * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee] The function invoked per iteration.
-   * @param {*} [thisArg] The `this` binding of `iteratee`.
-   * @returns {*} Returns the maximum value.
-   * @example
-   *
-   * _.max([4, 2, 8, 6]);
-   * // => 8
-   *
-   * _.max([]);
-   * // => -Infinity
-   *
-   * var users = [
-   *   { 'user': 'barney', 'age': 36 },
-   *   { 'user': 'fred',   'age': 40 }
-   * ];
-   *
-   * _.max(users, function(chr) { return chr.age; });
-   * // => { 'user': 'fred', 'age': 40 };
-   *
-   * // using the `_.property` callback shorthand
-   * _.max(users, 'age');
-   * // => { 'user': 'fred', 'age': 40 };
-   */
-  var max = createExtremum(arrayMax);
-
+define(["../math/max"], function(max) {
   return max;
 });

collection/min.js

@@ -1,51 +1,3 @@
-define(['../internal/arrayMin', '../internal/createExtremum'], function(arrayMin, createExtremum) {
-
-  /**
-   * Gets the minimum value of `collection`. If `collection` is empty or falsey
-   * `Infinity` is returned. If an iteratee function is provided it is invoked
-   * for each value in `collection` to generate the criterion by which the value
-   * is ranked. The `iteratee` is bound to `thisArg` and invoked with three
-   * arguments; (value, index, collection).
-   *
-   * If a property name is provided for `predicate` the created `_.property`
-   * style callback returns the property value of the given element.
-   *
-   * If a value is also provided for `thisArg` the created `_.matchesProperty`
-   * style callback returns `true` for elements that have a matching property
-   * value, else `false`.
-   *
-   * If an object is provided for `predicate` the created `_.matches` style
-   * callback returns `true` for elements that have the properties of the given
-   * object, else `false`.
-   *
-   * @static
-   * @memberOf _
-   * @category Collection
-   * @param {Array|Object|string} collection The collection to iterate over.
-   * @param {Function|Object|string} [iteratee] The function invoked per iteration.
-   * @param {*} [thisArg] The `this` binding of `iteratee`.
-   * @returns {*} Returns the minimum value.
-   * @example
-   *
-   * _.min([4, 2, 8, 6]);
-   * // => 2
-   *
-   * _.min([]);
-   * // => Infinity
-   *
-   * var users = [
-   *   { 'user': 'barney', 'age': 36 },
-   *   { 'user': 'fred',   'age': 40 }
-   * ];
-   *
-   * _.min(users, function(chr) { return chr.age; });
-   * // => { 'user': 'barney', 'age': 36 };
-   *
-   * // using the `_.property` callback shorthand
-   * _.min(users, 'age');
-   * // => { 'user': 'barney', 'age': 36 };
-   */
-  var min = createExtremum(arrayMin, true);
-
+define(["../math/min"], function(min) {
   return min;
 });

collection/partition.js

@@ -27,11 +27,15 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @returns {Array} Returns the array of grouped elements.
    * @example
    *
-   * _.partition([1, 2, 3], function(n) { return n % 2; });
+   * _.partition([1, 2, 3], function(n) {
+   *   return n % 2;
+   * });
    * // => [[1, 3], [2]]
    *
-   * _.partition([1.2, 2.3, 3.4], function(n) { return this.floor(n) % 2; }, Math);
-   * // => [[1, 3], [2]]
+   * _.partition([1.2, 2.3, 3.4], function(n) {
+   *   return this.floor(n) % 2;
+   * }, Math);
+   * // => [[1.2, 3.4], [2.3]]
    *
    * var users = [
    *   { 'user': 'barney',  'age': 36, 'active': false },
@@ -39,7 +43,9 @@ define(['../internal/createAggregator'], function(createAggregator) {
    *   { 'user': 'pebbles', 'age': 1,  'active': false }
    * ];
    *
-   * var mapper = function(array) { return _.pluck(array, 'user'); };
+   * var mapper = function(array) {
+   *   return _.pluck(array, 'user');
+   * };
    *
    * // using the `_.matches` callback shorthand
    * _.map(_.partition(users, { 'age': 1, 'active': false }), mapper);

collection/reduce.js

@@ -25,14 +25,16 @@ define(['../internal/arrayReduce', '../internal/baseCallback', '../internal/base
    * @returns {*} Returns the accumulated value.
    * @example
    *
-   * var sum = _.reduce([1, 2, 3], function(sum, n) { return sum + n; });
-   * // => 6
+   * _.reduce([1, 2], function(sum, n) {
+   *   return sum + n;
+   * });
+   * // => 3
    *
-   * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, n, key) {
+   * _.reduce({ 'a': 1, 'b': 2 }, function(result, n, key) {
    *   result[key] = n * 3;
    *   return result;
    * }, {});
-   * // => { 'a': 3, 'b': 6, 'c': 9 } (iteration order is not guaranteed)
+   * // => { 'a': 3, 'b': 6 } (iteration order is not guaranteed)
    */
   function reduce(collection, iteratee, accumulator, thisArg) {
     var func = isArray(collection) ? arrayReduce : baseReduce;

collection/reduceRight.js

@@ -16,7 +16,10 @@ define(['../internal/arrayReduceRight', '../internal/baseCallback', '../internal
    * @example
    *
    * var array = [[0, 1], [2, 3], [4, 5]];
-   * _.reduceRight(array, function(flattened, other) { return flattened.concat(other); }, []);
+   *
+   * _.reduceRight(array, function(flattened, other) {
+   *   return flattened.concat(other);
+   * }, []);
    * // => [4, 5, 2, 3, 0, 1]
    */
   function reduceRight(collection, iteratee, accumulator, thisArg) {

collection/reject.js

@@ -25,7 +25,9 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * @returns {Array} Returns the new filtered array.
    * @example
    *
-   * var odds = _.reject([1, 2, 3, 4], function(n) { return n % 2 == 0; });
+   * _.reject([1, 2, 3, 4], function(n) {
+   *   return n % 2 == 0;
+   * });
    * // => [1, 3]
    *
    * var users = [

collection/size.js

@@ -1,8 +1,8 @@
 define(['../internal/isLength', '../object/keys'], function(isLength, keys) {
 
   /**
-   * Gets the size of `collection` by returning `collection.length` for
-   * array-like values or the number of own enumerable properties for objects.
+   * Gets the size of `collection` by returning its length for array-like
+   * values or the number of own enumerable properties for objects.
    *
    * @static
    * @memberOf _
@@ -11,12 +11,12 @@ define(['../internal/isLength', '../object/keys'], function(isLength, keys) {
    * @returns {number} Returns the size of `collection`.
    * @example
    *
-   * _.size([1, 2]);
-   * // => 2
-   *
-   * _.size({ 'one': 1, 'two': 2, 'three': 3 });
+   * _.size([1, 2, 3]);
    * // => 3
    *
+   * _.size({ 'a': 1, 'b': 2 });
+   * // => 2
+   *
    * _.size('pebbles');
    * // => 7
    */

collection/some.js

@@ -38,7 +38,7 @@ define(['../internal/arraySome', '../internal/baseCallback', '../internal/baseSo
    * ];
    *
    * // using the `_.matches` callback shorthand
-   * _.some(users, { user': 'barney', 'active': false });
+   * _.some(users, { 'user': 'barney', 'active': false });
    * // => false
    *
    * // using the `_.matchesProperty` callback shorthand

collection/sortBy.js

@@ -29,10 +29,14 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseSor
    * @returns {Array} Returns the new sorted array.
    * @example
    *
-   * _.sortBy([1, 2, 3], function(n) { return Math.sin(n); });
+   * _.sortBy([1, 2, 3], function(n) {
+   *   return Math.sin(n);
+   * });
    * // => [3, 1, 2]
    *
-   * _.sortBy([1, 2, 3], function(n) { return this.sin(n); }, Math);
+   * _.sortBy([1, 2, 3], function(n) {
+   *   return this.sin(n);
+   * }, Math);
    * // => [3, 1, 2]
    *
    * var users = [
@@ -46,8 +50,11 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseSor
    * // => ['barney', 'fred', 'pebbles']
    */
   function sortBy(collection, iteratee, thisArg) {
+    if (collection == null) {
+      return [];
+    }
     var index = -1,
-        length = collection ? collection.length : 0,
+        length = collection.length,
         result = isLength(length) ? Array(length) : [];
 
     if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {

collection/sortByAll.js

@@ -1,7 +1,4 @@
-define(['../internal/baseEach', '../internal/baseFlatten', '../internal/baseSortBy', '../internal/compareMultipleAscending', '../internal/isIterateeCall', '../internal/isLength'], function(baseEach, baseFlatten, baseSortBy, compareMultipleAscending, isIterateeCall, isLength) {
-
-  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
-  var undefined;
+define(['../internal/baseFlatten', '../internal/baseSortByOrder', '../internal/isIterateeCall'], function(baseFlatten, baseSortByOrder, isIterateeCall) {
 
   /**
    * This method is like `_.sortBy` except that it sorts by property names
@@ -27,25 +24,16 @@ define(['../internal/baseEach', '../internal/baseFlatten', '../internal/baseSort
    * // => [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
    */
   function sortByAll(collection) {
-    var args = arguments;
-    if (args.length > 3 && isIterateeCall(args[1], args[2], args[3])) {
+    if (collection == null) {
+      return [];
+    }
+    var args = arguments,
+        guard = args[3];
+
+    if (guard && isIterateeCall(args[1], args[2], guard)) {
       args = [collection, args[1]];
     }
-    var index = -1,
-        length = collection ? collection.length : 0,
-        props = baseFlatten(args, false, false, 1),
-        result = isLength(length) ? Array(length) : [];
-
-    baseEach(collection, function(value) {
-      var length = props.length,
-          criteria = Array(length);
-
-      while (length--) {
-        criteria[length] = value == null ? undefined : value[props[length]];
-      }
-      result[++index] = { 'criteria': criteria, 'index': index, 'value': value };
-    });
-    return baseSortBy(result, compareMultipleAscending);
+    return baseSortByOrder(collection, baseFlatten(args, false, false, 1), []);
   }
 
   return sortByAll;

collection/sortByOrder.js

@@ -0,0 +1,47 @@
+define(['../internal/baseSortByOrder', '../lang/isArray', '../internal/isIterateeCall'], function(baseSortByOrder, isArray, isIterateeCall) {
+
+  /**
+   * This method is like `_.sortByAll` except that it allows specifying the
+   * sort orders of the property names to sort by. A truthy value in `orders`
+   * will sort the corresponding property name in ascending order while a
+   * falsey value will sort it in descending order.
+   *
+   * @static
+   * @memberOf _
+   * @category Collection
+   * @param {Array|Object|string} collection The collection to iterate over.
+   * @param {string[]} props The property names to sort by.
+   * @param {boolean[]} orders The sort orders of `props`.
+   * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`.
+   * @returns {Array} Returns the new sorted array.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney', 'age': 26 },
+   *   { 'user': 'fred',   'age': 40 },
+   *   { 'user': 'barney', 'age': 36 },
+   *   { 'user': 'fred',   'age': 30 }
+   * ];
+   *
+   * // sort by `user` in ascending order and by `age` in descending order
+   * _.map(_.sortByOrder(users, ['user', 'age'], [true, false]), _.values);
+   * // => [['barney', 36], ['barney', 26], ['fred', 40], ['fred', 30]]
+   */
+  function sortByOrder(collection, props, orders, guard) {
+    if (collection == null) {
+      return [];
+    }
+    if (guard && isIterateeCall(props, orders, guard)) {
+      orders = null;
+    }
+    if (!isArray(props)) {
+      props = props == null ? [] : [props];
+    }
+    if (!isArray(orders)) {
+      orders = orders == null ? [] : [orders];
+    }
+    return baseSortByOrder(collection, props, orders);
+  }
+
+  return sortByOrder;
+});

collection/sum.js

@@ -0,0 +1,3 @@
+define(["../math/sum"], function(sum) {
+  return sum;
+});

date/now.js

@@ -12,7 +12,9 @@ define(['../lang/isNative'], function(isNative) {
    * @category Date
    * @example
    *
-   * _.defer(function(stamp) { console.log(_.now() - stamp); }, _.now());
+   * _.defer(function(stamp) {
+   *   console.log(_.now() - stamp);
+   * }, _.now());
    * // => logs the number of milliseconds it took for the deferred function to be invoked
    */
   var now = nativeNow || function() {

function/bindAll.js

@@ -19,7 +19,9 @@ define(['../internal/baseBindAll', '../internal/baseFlatten', '../object/functio
    *
    * var view = {
    *   'label': 'docs',
-   *   'onClick': function() { console.log('clicked ' + this.label); }
+   *   'onClick': function() {
+   *     console.log('clicked ' + this.label);
+   *   }
    * };
    *
    * _.bindAll(view);

function/debounce.js

@@ -28,7 +28,7 @@ define(['../lang/isObject', '../date/now'], function(isObject, now) {
    * @memberOf _
    * @category Function
    * @param {Function} func The function to debounce.
-   * @param {number} wait The number of milliseconds to delay.
+   * @param {number} [wait=0] The number of milliseconds to delay.
    * @param {Object} [options] The options object.
    * @param {boolean} [options.leading=false] Specify invoking on the leading
    *  edge of the timeout.
@@ -86,7 +86,7 @@ define(['../lang/isObject', '../date/now'], function(isObject, now) {
     if (typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
-    wait = wait < 0 ? 0 : wait;
+    wait = wait < 0 ? 0 : (+wait || 0);
     if (options === true) {
       var leading = true;
       trailing = false;

function/defer.js

@@ -12,7 +12,9 @@ define(['../internal/baseDelay'], function(baseDelay) {
    * @returns {number} Returns the timer id.
    * @example
    *
-   * _.defer(function(text) { console.log(text); }, 'deferred');
+   * _.defer(function(text) {
+   *   console.log(text);
+   * }, 'deferred');
    * // logs 'deferred' after one or more milliseconds
    */
   function defer(func) {

function/delay.js

@@ -13,7 +13,9 @@ define(['../internal/baseDelay'], function(baseDelay) {
    * @returns {number} Returns the timer id.
    * @example
    *
-   * _.delay(function(text) { console.log(text); }, 1000, 'later');
+   * _.delay(function(text) {
+   *   console.log(text);
+   * }, 1000, 'later');
    * // => logs 'later' after one second
    */
   function delay(func, wait) {

function/flow.js

@@ -1,7 +1,4 @@
-define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, isFunction) {
-
-  /** Used as the `TypeError` message for "Functions" methods. */
-  var FUNC_ERROR_TEXT = 'Expected a function';
+define(['../internal/createComposer'], function(createComposer) {
 
   /**
    * Creates a function that returns the result of invoking the provided
@@ -15,38 +12,15 @@ define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, is
    * @returns {Function} Returns the new function.
    * @example
    *
-   * function add(x, y) {
-   *   return x + y;
-   * }
-   *
    * function square(n) {
    *   return n * n;
    * }
    *
-   * var addSquare = _.flow(add, square);
+   * var addSquare = _.flow(_.add, square);
    * addSquare(1, 2);
    * // => 9
    */
-  function flow() {
-    var funcs = arguments,
-        length = funcs.length;
-
-    if (!length) {
-      return function() { return arguments[0]; };
-    }
-    if (!arrayEvery(funcs, isFunction)) {
-      throw new TypeError(FUNC_ERROR_TEXT);
-    }
-    return function() {
-      var index = 0,
-          result = funcs[index].apply(this, arguments);
-
-      while (++index < length) {
-        result = funcs[index].call(this, result);
-      }
-      return result;
-    };
-  }
+  var flow = createComposer();
 
   return flow;
 });

function/flowRight.js

@@ -1,7 +1,4 @@
-define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, isFunction) {
-
-  /** Used as the `TypeError` message for "Functions" methods. */
-  var FUNC_ERROR_TEXT = 'Expected a function';
+define(['../internal/createComposer'], function(createComposer) {
 
   /**
    * This method is like `_.flow` except that it creates a function that
@@ -15,38 +12,15 @@ define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, is
    * @returns {Function} Returns the new function.
    * @example
    *
-   * function add(x, y) {
-   *   return x + y;
-   * }
-   *
    * function square(n) {
    *   return n * n;
    * }
    *
-   * var addSquare = _.flowRight(square, add);
+   * var addSquare = _.flowRight(square, _.add);
    * addSquare(1, 2);
    * // => 9
    */
-  function flowRight() {
-    var funcs = arguments,
-        fromIndex = funcs.length - 1;
-
-    if (fromIndex < 0) {
-      return function() { return arguments[0]; };
-    }
-    if (!arrayEvery(funcs, isFunction)) {
-      throw new TypeError(FUNC_ERROR_TEXT);
-    }
-    return function() {
-      var index = fromIndex,
-          result = funcs[index].apply(this, arguments);
-
-      while (index--) {
-        result = funcs[index].call(this, result);
-      }
-      return result;
-    };
-  }
+  var flowRight = createComposer(true);
 
   return flowRight;
 });

function/memoize.js

@@ -61,13 +61,14 @@ define(['../internal/MapCache'], function(MapCache) {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     var memoized = function() {
-      var cache = memoized.cache,
-          key = resolver ? resolver.apply(this, arguments) : arguments[0];
+      var args = arguments,
+          cache = memoized.cache,
+          key = resolver ? resolver.apply(this, args) : args[0];
 
       if (cache.has(key)) {
         return cache.get(key);
       }
-      var result = func.apply(this, arguments);
+      var result = func.apply(this, args);
       cache.set(key, result);
       return result;
     };

function/rearg.js

@@ -26,7 +26,9 @@ define(['../internal/baseFlatten', '../internal/createWrapper'], function(baseFl
    * // => ['a', 'b', 'c']
    *
    * var map = _.rearg(_.map, [1, 0]);
-   * map(function(n) { return n * 3; }, [1, 2, 3]);
+   * map(function(n) {
+   *   return n * 3;
+   * }, [1, 2, 3]);
    * // => [3, 6, 9]
    */
   function rearg(func) {

function/throttle.js

@@ -29,7 +29,7 @@ define(['./debounce', '../lang/isObject'], function(debounce, isObject) {
    * @memberOf _
    * @category Function
    * @param {Function} func The function to throttle.
-   * @param {number} wait The number of milliseconds to throttle invocations to.
+   * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
    * @param {Object} [options] The options object.
    * @param {boolean} [options.leading=true] Specify invoking on the leading
    *  edge of the timeout.
@@ -42,8 +42,9 @@ define(['./debounce', '../lang/isObject'], function(debounce, isObject) {
    * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
    *
    * // invoke `renewToken` when the click event is fired, but not more than once every 5 minutes
-   * var throttled =  _.throttle(renewToken, 300000, { 'trailing': false })
-   * jQuery('.interactive').on('click', throttled);
+   * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
+   *   'trailing': false
+   * }));
    *
    * // cancel a trailing throttled call
    * jQuery(window).on('popstate', throttled.cancel);

internal/LazyWrapper.js

@@ -1,4 +1,4 @@
-define([], function() {
+define(['./baseCreate', './baseLodash'], function(baseCreate, baseLodash) {
 
   /** Used as references for `-Infinity` and `Infinity`. */
   var POSITIVE_INFINITY = Number.POSITIVE_INFINITY;
@@ -20,5 +20,8 @@ define([], function() {
     this.__views__ = null;
   }
 
+  LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+  LazyWrapper.prototype.constructor = LazyWrapper;
+
   return LazyWrapper;
 });

internal/LodashWrapper.js

@@ -1,4 +1,4 @@
-define([], function() {
+define(['./baseCreate', './baseLodash'], function(baseCreate, baseLodash) {
 
   /**
    * The base constructor for creating `lodash` wrapper objects.
@@ -14,5 +14,8 @@ define([], function() {
     this.__chain__ = !!chainAll;
   }
 
+  LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+  LodashWrapper.prototype.constructor = LodashWrapper;
+
   return LodashWrapper;
 });

internal/baseAssign.js

@@ -23,7 +23,7 @@ define(['./baseCopy', '../object/keys'], function(baseCopy, keys) {
           value = object[key],
           result = customizer(value, source[key], key, object, source);
 
-      if ((result === result ? result !== value : value === value) ||
+      if ((result === result ? (result !== value) : (value === value)) ||
           (typeof value == 'undefined' && !(key in object))) {
         object[key] = result;
       }

internal/baseDifference.js

@@ -19,7 +19,7 @@ define(['./baseIndexOf', './cacheIndexOf', './createCache'], function(baseIndexO
     var index = -1,
         indexOf = baseIndexOf,
         isCommon = true,
-        cache = isCommon && values.length >= 200 && createCache(values),
+        cache = (isCommon && values.length >= 200) ? createCache(values) : null,
         valuesLength = values.length;
 
     if (cache) {
@@ -40,7 +40,7 @@ define(['./baseIndexOf', './cacheIndexOf', './createCache'], function(baseIndexO
         }
         result.push(value);
       }
-      else if (indexOf(values, value) < 0) {
+      else if (indexOf(values, value, 0) < 0) {
         result.push(value);
       }
     }

internal/baseFill.js

@@ -21,7 +21,7 @@ define([], function() {
     if (end < 0) {
       end += length;
     }
-    length = start > end ? 0 : end >>> 0;
+    length = start > end ? 0 : (end >>> 0);
     start >>>= 0;
 
     while (start < length) {

internal/baseFlatten.js

@@ -6,13 +6,13 @@ define(['../lang/isArguments', '../lang/isArray', './isLength', './isObjectLike'
    *
    * @private
    * @param {Array} array The array to flatten.
-   * @param {boolean} [isDeep] Specify a deep flatten.
-   * @param {boolean} [isStrict] Restrict flattening to arrays and `arguments` objects.
-   * @param {number} [fromIndex=0] The index to start from.
+   * @param {boolean} isDeep Specify a deep flatten.
+   * @param {boolean} isStrict Restrict flattening to arrays and `arguments` objects.
+   * @param {number} fromIndex The index to start from.
    * @returns {Array} Returns the new flattened array.
    */
   function baseFlatten(array, isDeep, isStrict, fromIndex) {
-    var index = (fromIndex || 0) - 1,
+    var index = fromIndex - 1,
         length = array.length,
         resIndex = -1,
         result = [];
@@ -23,7 +23,7 @@ define(['../lang/isArguments', '../lang/isArray', './isLength', './isObjectLike'
       if (isObjectLike(value) && isLength(value.length) && (isArray(value) || isArguments(value))) {
         if (isDeep) {
           // Recursively flatten arrays (susceptible to call stack limits).
-          value = baseFlatten(value, isDeep, isStrict);
+          value = baseFlatten(value, isDeep, isStrict, 0);
         }
         var valIndex = -1,
             valLength = value.length;

internal/baseIndexOf.js

@@ -6,14 +6,14 @@ define(['./indexOfNaN'], function(indexOfNaN) {
    * @private
    * @param {Array} array The array to search.
    * @param {*} value The value to search for.
-   * @param {number} [fromIndex=0] The index to search from.
+   * @param {number} fromIndex The index to search from.
    * @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,
+    var index = fromIndex - 1,
         length = array.length;
 
     while (++index < length) {

internal/baseIsFunction.js

@@ -0,0 +1,18 @@
+define([], function() {
+
+  /**
+   * The base implementation of `_.isFunction` without support for environments
+   * with incorrect `typeof` results.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+   */
+  function baseIsFunction(value) {
+    // Avoid a Chakra JIT bug in compatibility modes of IE 11.
+    // See https://github.com/jashkenas/underscore/issues/1621 for more details.
+    return typeof value == 'function' || false;
+  }
+
+  return baseIsFunction;
+});

internal/baseLodash.js

@@ -0,0 +1,13 @@
+define([], function() {
+
+  /**
+   * The function whose prototype all chaining wrappers inherit from.
+   *
+   * @private
+   */
+  function baseLodash() {
+    // No operation performed.
+  }
+
+  return baseLodash;
+});

internal/baseMerge.js

@@ -1,4 +1,4 @@
-define(['./arrayEach', './baseForOwn', './baseMergeDeep', '../lang/isArray', './isLength', './isObjectLike', '../lang/isTypedArray'], function(arrayEach, baseForOwn, baseMergeDeep, isArray, isLength, isObjectLike, isTypedArray) {
+define(['./arrayEach', './baseForOwn', './baseMergeDeep', '../lang/isArray', './isLength', '../lang/isObject', './isObjectLike', '../lang/isTypedArray'], function(arrayEach, baseForOwn, baseMergeDeep, isArray, isLength, isObject, isObjectLike, isTypedArray) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -16,8 +16,10 @@ define(['./arrayEach', './baseForOwn', './baseMergeDeep', '../lang/isArray', './
    * @returns {Object} Returns the destination object.
    */
   function baseMerge(object, source, customizer, stackA, stackB) {
+    if (!isObject(object)) {
+      return object;
+    }
     var isSrcArr = isLength(source.length) && (isArray(source) || isTypedArray(source));
-
     (isSrcArr ? arrayEach : baseForOwn)(source, function(srcValue, key, source) {
       if (isObjectLike(srcValue)) {
         stackA || (stackA = []);
@@ -32,7 +34,7 @@ define(['./arrayEach', './baseForOwn', './baseMergeDeep', '../lang/isArray', './
         result = srcValue;
       }
       if ((isSrcArr || typeof result != 'undefined') &&
-          (isCommon || (result === result ? result !== value : value === value))) {
+          (isCommon || (result === result ? (result !== value) : (value === value)))) {
         object[key] = result;
       }
     });

internal/baseMergeDeep.js

@@ -56,7 +56,7 @@ define(['./arrayCopy', '../lang/isArguments', '../lang/isArray', './isLength', '
     if (isCommon) {
       // Recursively merge objects and arrays (susceptible to call stack limits).
       object[key] = mergeFunc(result, srcValue, customizer, stackA, stackB);
-    } else if (result === result ? result !== value : value === value) {
+    } else if (result === result ? (result !== value) : (value === value)) {
       object[key] = result;
     }
   }

internal/baseSlice.js

@@ -21,7 +21,7 @@ define([], function() {
     if (end < 0) {
       end += length;
     }
-    length = start > end ? 0 : (end - start) >>> 0;
+    length = start > end ? 0 : ((end - start) >>> 0);
     start >>>= 0;
 
     var result = Array(length);

internal/baseSortBy.js

@@ -1,8 +1,8 @@
 define([], function() {
 
   /**
-   * The base implementation of `_.sortBy` and `_.sortByAll` which uses `comparer`
-   * to define the sort order of `array` and replaces criteria objects with their
+   * The base implementation of `_.sortBy` which uses `comparer` to define
+   * the sort order of `array` and replaces criteria objects with their
    * corresponding values.
    *
    * @private

internal/baseSortByOrder.js

@@ -0,0 +1,36 @@
+define(['./baseEach', './baseSortBy', './compareMultiple', './isLength'], function(baseEach, baseSortBy, compareMultiple, isLength) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * The base implementation of `_.sortByOrder` without param guards.
+   *
+   * @private
+   * @param {Array|Object|string} collection The collection to iterate over.
+   * @param {string[]} props The property names to sort by.
+   * @param {boolean[]} orders The sort orders of `props`.
+   * @returns {Array} Returns the new sorted array.
+   */
+  function baseSortByOrder(collection, props, orders) {
+    var index = -1,
+        length = collection.length,
+        result = isLength(length) ? Array(length) : [];
+
+    baseEach(collection, function(value) {
+      var length = props.length,
+          criteria = Array(length);
+
+      while (length--) {
+        criteria[length] = value == null ? undefined : value[props[length]];
+      }
+      result[++index] = { 'criteria': criteria, 'index': index, 'value': value };
+    });
+
+    return baseSortBy(result, function(object, other) {
+      return compareMultiple(object, other, orders);
+    });
+  }
+
+  return baseSortByOrder;
+});

internal/baseUniq.js

@@ -15,7 +15,7 @@ define(['./baseIndexOf', './cacheIndexOf', './createCache'], function(baseIndexO
         length = array.length,
         isCommon = true,
         isLarge = isCommon && length >= 200,
-        seen = isLarge && createCache(),
+        seen = isLarge ? createCache() : null,
         result = [];
 
     if (seen) {
@@ -42,7 +42,7 @@ define(['./baseIndexOf', './cacheIndexOf', './createCache'], function(baseIndexO
         }
         result.push(value);
       }
-      else if (indexOf(seen, computed) < 0) {
+      else if (indexOf(seen, computed, 0) < 0) {
         if (iteratee || isLarge) {
           seen.push(computed);
         }

internal/compareMultiple.js

@@ -1,24 +1,33 @@
 define(['./baseCompareAscending'], function(baseCompareAscending) {
 
   /**
-   * Used by `_.sortByAll` to compare multiple properties of each element
-   * in a collection and stable sort them in ascending order.
+   * Used by `_.sortByOrder` to compare multiple properties of each element
+   * in a collection and stable sort them in the following order:
+   *
+   * If orders is unspecified, sort in ascending order for all properties.
+   * Otherwise, for each property, sort in ascending order if its corresponding value in
+   * orders is true, and descending order if false.
    *
    * @private
    * @param {Object} object The object to compare to `other`.
    * @param {Object} other The object to compare to `object`.
+   * @param {boolean[]} orders The order to sort by for each property.
    * @returns {number} Returns the sort order indicator for `object`.
    */
-  function compareMultipleAscending(object, other) {
+  function compareMultiple(object, other, orders) {
     var index = -1,
         objCriteria = object.criteria,
         othCriteria = other.criteria,
-        length = objCriteria.length;
+        length = objCriteria.length,
+        ordersLength = orders.length;
 
     while (++index < length) {
       var result = baseCompareAscending(objCriteria[index], othCriteria[index]);
       if (result) {
-        return result;
+        if (index >= ordersLength) {
+          return result;
+        }
+        return result * (orders[index] ? 1 : -1);
       }
     }
     // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
@@ -31,5 +40,5 @@ define(['./baseCompareAscending'], function(baseCompareAscending) {
     return object.index - other.index;
   }
 
-  return compareMultipleAscending;
+  return compareMultiple;
 });

internal/createAssigner.js

@@ -10,24 +10,31 @@ define(['./bindCallback', './isIterateeCall'], function(bindCallback, isIteratee
    */
   function createAssigner(assigner) {
     return function() {
-      var length = arguments.length,
-          object = arguments[0];
+      var args = arguments,
+          length = args.length,
+          object = args[0];
 
       if (length < 2 || object == null) {
         return object;
       }
-      if (length > 3 && isIterateeCall(arguments[1], arguments[2], arguments[3])) {
-        length = 2;
+      var customizer = args[length - 2],
+          thisArg = args[length - 1],
+          guard = args[3];
+
+      if (length > 3 && typeof customizer == 'function') {
+        customizer = bindCallback(customizer, thisArg, 5);
+        length -= 2;
+      } else {
+        customizer = (length > 2 && typeof thisArg == 'function') ? thisArg : null;
+        length -= (customizer ? 1 : 0);
       }
-      // Juggle arguments.
-      if (length > 3 && typeof arguments[length - 2] == 'function') {
-        var customizer = bindCallback(arguments[--length - 1], arguments[length--], 5);
-      } else if (length > 2 && typeof arguments[length - 1] == 'function') {
-        customizer = arguments[--length];
+      if (guard && isIterateeCall(args[1], args[2], guard)) {
+        customizer = length == 3 ? null : customizer;
+        length = 2;
       }
       var index = 0;
       while (++index < length) {
-        var source = arguments[index];
+        var source = args[index];
         if (source) {
           assigner(object, source, customizer);
         }

internal/createBindWrapper.js

@@ -1,4 +1,4 @@
-define(['./createCtorWrapper'], function(createCtorWrapper) {
+define(['./createCtorWrapper', './root'], function(createCtorWrapper, root) {
 
   /**
    * Creates a function that wraps `func` and invokes it with the `this`
@@ -13,7 +13,8 @@ define(['./createCtorWrapper'], function(createCtorWrapper) {
     var Ctor = createCtorWrapper(func);
 
     function wrapper() {
-      return (this instanceof wrapper ? Ctor : func).apply(thisArg, arguments);
+      var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+      return fn.apply(thisArg, arguments);
     }
     return wrapper;
   }

internal/createComposer.js

@@ -0,0 +1,42 @@
+define([], function() {
+
+  /** Used as the `TypeError` message for "Functions" methods. */
+  var FUNC_ERROR_TEXT = 'Expected a function';
+
+  /**
+   * Creates a function to compose other functions into a single function.
+   *
+   * @private
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {Function} Returns the new composer function.
+   */
+  function createComposer(fromRight) {
+    return function() {
+      var length = arguments.length,
+          index = length,
+          fromIndex = fromRight ? (length - 1) : 0;
+
+      if (!length) {
+        return function() { return arguments[0]; };
+      }
+      var funcs = Array(length);
+      while (index--) {
+        funcs[index] = arguments[index];
+        if (typeof funcs[index] != 'function') {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
+      }
+      return function() {
+        var index = fromIndex,
+            result = funcs[index].apply(this, arguments);
+
+        while ((fromRight ? index-- : ++index < length)) {
+          result = funcs[index].call(this, result);
+        }
+        return result;
+      };
+    };
+  }
+
+  return createComposer;
+});

internal/createHybridWrapper.js

@@ -1,4 +1,4 @@
-define(['./arrayCopy', './composeArgs', './composeArgsRight', './createCtorWrapper', './reorder', './replaceHolders'], function(arrayCopy, composeArgs, composeArgsRight, createCtorWrapper, reorder, replaceHolders) {
+define(['./arrayCopy', './composeArgs', './composeArgsRight', './createCtorWrapper', './reorder', './replaceHolders', './root'], function(arrayCopy, composeArgs, composeArgsRight, createCtorWrapper, reorder, replaceHolders, root) {
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1,
@@ -91,7 +91,8 @@ define(['./arrayCopy', './composeArgs', './composeArgsRight', './createCtorWrapp
       if (isAry && ary < args.length) {
         args.length = ary;
       }
-      return (this instanceof wrapper ? (Ctor || createCtorWrapper(func)) : func).apply(thisBinding, args);
+      var fn = (this && this !== root && this instanceof wrapper) ? (Ctor || createCtorWrapper(func)) : func;
+      return fn.apply(thisBinding, args);
     }
     return wrapper;
   }

internal/createPartialWrapper.js

@@ -1,4 +1,4 @@
-define(['./createCtorWrapper'], function(createCtorWrapper) {
+define(['./createCtorWrapper', './root'], function(createCtorWrapper, root) {
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1;
@@ -34,7 +34,8 @@ define(['./createCtorWrapper'], function(createCtorWrapper) {
       while (argsLength--) {
         args[leftIndex++] = arguments[++argsIndex];
       }
-      return (this instanceof wrapper ? Ctor : func).apply(isBind ? thisArg : this, args);
+      var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+      return fn.apply(isBind ? thisArg : this, args);
     }
     return wrapper;
   }

internal/equalObjects.js

@@ -64,8 +64,10 @@ define(['../object/keys'], function(keys) {
           othCtor = other.constructor;
 
       // Non `Object` object instances with different constructors are not equal.
-      if (objCtor != othCtor && ('constructor' in object && 'constructor' in other) &&
-          !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+      if (objCtor != othCtor &&
+          ('constructor' in object && 'constructor' in other) &&
+          !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+            typeof othCtor == 'function' && othCtor instanceof othCtor)) {
         return false;
       }
     }

internal/extremumBy.js

@@ -23,7 +23,8 @@ define(['./baseEach'], function(baseEach) {
 
     baseEach(collection, function(value, index, collection) {
       var current = iteratee(value, index, collection);
-      if ((isMin ? current < computed : current > computed) || (current === exValue && current === result)) {
+      if ((isMin ? (current < computed) : (current > computed)) ||
+          (current === exValue && current === result)) {
         computed = current;
         result = value;
       }

internal/indexOfNaN.js

@@ -6,13 +6,13 @@ define([], function() {
    *
    * @private
    * @param {Array} array The array to search.
-   * @param {number} [fromIndex] The index to search from.
+   * @param {number} fromIndex The index to search from.
    * @param {boolean} [fromRight] 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);
+        index = fromIndex + (fromRight ? 0 : -1);
 
     while ((fromRight ? index-- : ++index < length)) {
       var other = array[index];

internal/isIterateeCall.js

@@ -20,7 +20,11 @@ define(['./isIndex', './isLength', '../lang/isObject'], function(isIndex, isLeng
     } else {
       prereq = type == 'string' && index in object;
     }
-    return prereq && object[index] === value;
+    if (prereq) {
+      var other = object[index];
+      return value === value ? (value === other) : (other !== other);
+    }
+    return false;
   }
 
   return isIterateeCall;

internal/lazyClone.js

@@ -16,7 +16,6 @@ define(['./LazyWrapper', './arrayCopy'], function(LazyWrapper, arrayCopy) {
 
     result.__actions__ = actions ? arrayCopy(actions) : null;
     result.__dir__ = this.__dir__;
-    result.__dropCount__ = this.__dropCount__;
     result.__filtered__ = this.__filtered__;
     result.__iteratees__ = iteratees ? arrayCopy(iteratees) : null;
     result.__takeCount__ = this.__takeCount__;

internal/lazyValue.js

@@ -1,8 +1,9 @@
 define(['./baseWrapperValue', './getView', '../lang/isArray'], function(baseWrapperValue, getView, isArray) {
 
   /** Used to indicate the type of lazy iteratees. */
-  var LAZY_FILTER_FLAG = 0,
-      LAZY_MAP_FLAG = 1;
+  var LAZY_DROP_WHILE_FLAG = 0,
+      LAZY_FILTER_FLAG = 1,
+      LAZY_MAP_FLAG = 2;
 
   /* Native method references for those with the same name as other `lodash` methods. */
   var nativeMin = Math.min;
@@ -26,9 +27,8 @@ define(['./baseWrapperValue', './getView', '../lang/isArray'], function(baseWrap
         start = view.start,
         end = view.end,
         length = end - start,
-        dropCount = this.__dropCount__,
+        index = isRight ? end : (start - 1),
         takeCount = nativeMin(length, this.__takeCount__),
-        index = isRight ? end : start - 1,
         iteratees = this.__iteratees__,
         iterLength = iteratees ? iteratees.length : 0,
         resIndex = 0,
@@ -44,24 +44,34 @@ define(['./baseWrapperValue', './getView', '../lang/isArray'], function(baseWrap
       while (++iterIndex < iterLength) {
         var data = iteratees[iterIndex],
             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 (type == LAZY_DROP_WHILE_FLAG) {
+          if (data.done && (isRight ? (index > data.index) : (index < data.index))) {
+            data.count = 0;
+            data.done = false;
+          }
+          data.index = index;
+          if (!data.done) {
+            var limit = data.limit;
+            if (!(data.done = limit > -1 ? (data.count++ >= limit) : !iteratee(value))) {
+              continue outer;
+            }
+          }
+        } else {
+          var computed = iteratee(value);
+          if (type == LAZY_MAP_FLAG) {
+            value = computed;
+          } else if (!computed) {
+            if (type == LAZY_FILTER_FLAG) {
+              continue outer;
+            } else {
+              break outer;
+            }
           }
         }
       }
-      if (dropCount) {
-        dropCount--;
-      } else {
-        result[resIndex++] = value;
-      }
+      result[resIndex++] = value;
     }
     return result;
   }

internal/root.js

@@ -6,25 +6,25 @@ define([], function() {
     'object': true
   };
 
-  /**
-   * Used as a reference to the global object.
-   *
-   * The `this` value is used if it is the global object to avoid Greasemonkey's
-   * restricted `window` object, otherwise the `window` object is used.
-   */
-  var root = (objectTypes[typeof window] && window !== (this && this.window)) ? window : this;
-
   /** Detect free variable `exports`. */
   var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
 
   /** Detect free variable `module`. */
   var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
 
-  /** Detect free variable `global` from Node.js or Browserified code and use it as `root`. */
+  /** Detect free variable `global` from Node.js. */
   var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
-  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
-    root = freeGlobal;
-  }
+
+  /** Detect free variable `window`. */
+  var freeWindow = objectTypes[typeof window] && window;
+
+  /**
+   * Used as a reference to the global object.
+   *
+   * The `this` value is used if it is the global object to avoid Greasemonkey's
+   * restricted `window` object, otherwise the `window` object is used.
+   */
+  var root = freeGlobal || ((freeWindow !== (this && this.window)) && freeWindow) || this;
 
   return root;
 });

lang/clone.js

@@ -38,22 +38,26 @@ define(['../internal/baseClone', '../internal/bindCallback', '../internal/isIter
    * // => false
    *
    * // using a customizer callback
-   * var body = _.clone(document.body, function(value) {
-   *   return _.isElement(value) ? value.cloneNode(false) : undefined;
+   * var el = _.clone(document.body, function(value) {
+   *   if (_.isElement(value)) {
+   *     return value.cloneNode(false);
+   *   }
    * });
    *
-   * body === document.body
+   * el === document.body
    * // => false
-   * body.nodeName
+   * el.nodeName
    * // => BODY
-   * body.childNodes.length;
+   * el.childNodes.length;
    * // => 0
    */
   function clone(value, isDeep, customizer, thisArg) {
-    // Juggle arguments.
-    if (typeof isDeep != 'boolean' && isDeep != null) {
+    if (isDeep && typeof isDeep != 'boolean' && isIterateeCall(value, isDeep, customizer)) {
+      isDeep = false;
+    }
+    else if (typeof isDeep == 'function') {
       thisArg = customizer;
-      customizer = isIterateeCall(value, isDeep, thisArg) ? null : isDeep;
+      customizer = isDeep;
       isDeep = false;
     }
     customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 1);

lang/cloneDeep.js

@@ -33,14 +33,16 @@ define(['../internal/baseClone', '../internal/bindCallback'], function(baseClone
    *
    * // using a customizer callback
    * var el = _.cloneDeep(document.body, function(value) {
-   *   return _.isElement(value) ? value.cloneNode(true) : undefined;
+   *   if (_.isElement(value)) {
+   *     return value.cloneNode(true);
+   *   }
    * });
    *
-   * body === document.body
+   * el === document.body
    * // => false
-   * body.nodeName
+   * el.nodeName
    * // => BODY
-   * body.childNodes.length;
+   * el.childNodes.length;
    * // => 20
    */
   function cloneDeep(value, customizer, thisArg) {

lang/isArguments.js

@@ -26,7 +26,7 @@ define(['../internal/isLength', '../internal/isObjectLike'], function(isLength,
    * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
    * @example
    *
-   * (function() { return _.isArguments(arguments); })();
+   * _.isArguments(function() { return arguments; }());
    * // => true
    *
    * _.isArguments([1, 2, 3]);

lang/isArray.js

@@ -29,7 +29,7 @@ define(['../internal/isLength', './isNative', '../internal/isObjectLike'], funct
    * _.isArray([1, 2, 3]);
    * // => true
    *
-   * (function() { return _.isArray(arguments); })();
+   * _.isArray(function() { return arguments; }());
    * // => false
    */
   var isArray = nativeIsArray || function(value) {

lang/isElement.js

@@ -28,7 +28,7 @@ define(['../internal/isObjectLike', './isPlainObject', '../support'], function(i
    */
   function isElement(value) {
     return (value && value.nodeType === 1 && isObjectLike(value) &&
-      objToString.call(value).indexOf('Element') > -1) || false;
+      (objToString.call(value).indexOf('Element') > -1)) || false;
   }
   // Fallback for environments without DOM support.
   if (!support.dom) {

lang/isEmpty.js

@@ -1,7 +1,7 @@
 define(['./isArguments', './isArray', './isFunction', '../internal/isLength', '../internal/isObjectLike', './isString', '../object/keys'], function(isArguments, isArray, isFunction, isLength, isObjectLike, isString, keys) {
 
   /**
-   * Checks if a value is empty. A value is considered empty unless it is an
+   * Checks if `value` is empty. A value is considered empty unless it is an
    * `arguments` object, array, string, or jQuery-like collection with a length
    * greater than `0` or an object with own enumerable properties.
    *

lang/isEqual.js

@@ -40,7 +40,9 @@ define(['../internal/baseIsEqual', '../internal/bindCallback', '../internal/isSt
    * var other = ['hi', 'goodbye'];
    *
    * _.isEqual(array, other, function(value, other) {
-   *   return _.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/) || undefined;
+   *   if (_.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/)) {
+   *     return true;
+   *   }
    * });
    * // => true
    */

lang/isFunction.js

@@ -1,4 +1,4 @@
-define(['./isNative', '../internal/root'], function(isNative, root) {
+define(['../internal/baseIsFunction', './isNative', '../internal/root'], function(baseIsFunction, isNative, root) {
 
   /** `Object#toString` result references. */
   var funcTag = '[object Function]';
@@ -32,20 +32,12 @@ define(['./isNative', '../internal/root'], function(isNative, root) {
    * _.isFunction(/abc/);
    * // => false
    */
-  function isFunction(value) {
-    // Avoid a Chakra JIT bug in compatibility modes of IE 11.
-    // See https://github.com/jashkenas/underscore/issues/1621 for more details.
-    return typeof value == 'function' || false;
-  }
-  // Fallback for environments that return incorrect `typeof` operator results.
-  if (isFunction(/x/) || (Uint8Array && !isFunction(Uint8Array))) {
-    isFunction = function(value) {
-      // The use of `Object#toString` avoids issues with the `typeof` operator
-      // in older versions of Chrome and Safari which return 'function' for regexes
-      // and Safari 8 equivalents which return 'object' for typed array constructors.
-      return objToString.call(value) == funcTag;
-    };
-  }
+  var isFunction = !(baseIsFunction(/x/) || (Uint8Array && !baseIsFunction(Uint8Array))) ? baseIsFunction : function(value) {
+    // The use of `Object#toString` avoids issues with the `typeof` operator
+    // in older versions of Chrome and Safari which return 'function' for regexes
+    // and Safari 8 equivalents which return 'object' for typed array constructors.
+    return objToString.call(value) == funcTag;
+  };
 
   return isFunction;
 });

lang/toArray.js

@@ -10,7 +10,9 @@ define(['../internal/arrayCopy', '../internal/isLength', '../object/values'], fu
    * @returns {Array} Returns the converted array.
    * @example
    *
-   * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3);
+   * (function() {
+   *   return _.toArray(arguments).slice(1);
+   * }(1, 2, 3));
    * // => [2, 3]
    */
   function toArray(value) {

math.js

@@ -0,0 +1,8 @@
+define(['./math/add', './math/max', './math/min', './math/sum'], function(add, max, min, sum) {
+  return {
+    'add': add,
+    'max': max,
+    'min': min,
+    'sum': sum
+  };
+});