Bump to v3.3.0.

README.md

@@ -1,4 +1,4 @@
-# lodash v3.1.0
+# lodash v3.3.0
 
 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.js

@@ -1,4 +1,4 @@
-define(['./array/chunk', './array/compact', './array/difference', './array/drop', './array/dropRight', './array/dropRightWhile', './array/dropWhile', './array/findIndex', './array/findLastIndex', './array/first', './array/flatten', './array/flattenDeep', './array/head', './array/indexOf', './array/initial', './array/intersection', './array/last', './array/lastIndexOf', './array/object', './array/pull', './array/pullAt', './array/remove', './array/rest', './array/slice', './array/sortedIndex', './array/sortedLastIndex', './array/tail', './array/take', './array/takeRight', './array/takeRightWhile', './array/takeWhile', './array/union', './array/uniq', './array/unique', './array/unzip', './array/without', './array/xor', './array/zip', './array/zipObject'], function(chunk, compact, difference, drop, dropRight, dropRightWhile, dropWhile, findIndex, findLastIndex, first, flatten, flattenDeep, head, indexOf, initial, intersection, last, lastIndexOf, object, pull, pullAt, remove, rest, slice, sortedIndex, sortedLastIndex, tail, take, takeRight, takeRightWhile, takeWhile, union, uniq, unique, unzip, without, xor, zip, zipObject) {
+define(['./array/chunk', './array/compact', './array/difference', './array/drop', './array/dropRight', './array/dropRightWhile', './array/dropWhile', './array/fill', './array/findIndex', './array/findLastIndex', './array/first', './array/flatten', './array/flattenDeep', './array/head', './array/indexOf', './array/initial', './array/intersection', './array/last', './array/lastIndexOf', './array/object', './array/pull', './array/pullAt', './array/remove', './array/rest', './array/slice', './array/sortedIndex', './array/sortedLastIndex', './array/tail', './array/take', './array/takeRight', './array/takeRightWhile', './array/takeWhile', './array/union', './array/uniq', './array/unique', './array/unzip', './array/without', './array/xor', './array/zip', './array/zipObject'], function(chunk, compact, difference, drop, dropRight, dropRightWhile, dropWhile, fill, findIndex, findLastIndex, first, flatten, flattenDeep, head, indexOf, initial, intersection, last, lastIndexOf, object, pull, pullAt, remove, rest, slice, sortedIndex, sortedLastIndex, tail, take, takeRight, takeRightWhile, takeWhile, union, uniq, unique, unzip, without, xor, zip, zipObject) {
   return {
     'chunk': chunk,
     'compact': compact,
@@ -7,6 +7,7 @@ define(['./array/chunk', './array/compact', './array/difference', './array/drop'
     'dropRight': dropRight,
     'dropRightWhile': dropRightWhile,
     'dropWhile': dropWhile,
+    'fill': fill,
     'findIndex': findIndex,
     'findLastIndex': findLastIndex,
     'first': first,

array/chunk.js

@@ -15,7 +15,7 @@ define(['../internal/baseSlice', '../internal/isIterateeCall'], function(baseSli
    * @memberOf _
    * @category Array
    * @param {Array} array The array to process.
-   * @param {numer} [size=1] The length of each chunk.
+   * @param {number} [size=1] The length of each chunk.
    * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
    * @returns {Array} Returns the new array containing chunks.
    * @example

array/difference.js

@@ -17,7 +17,7 @@ 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() {

array/drop.js

@@ -5,7 +5,6 @@ define(['../internal/baseSlice', '../internal/isIterateeCall'], function(baseSli
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {number} [n=1] The number of elements to drop.

array/dropRight.js

@@ -5,7 +5,6 @@ define(['../internal/baseSlice', '../internal/isIterateeCall'], function(baseSli
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {number} [n=1] The number of elements to drop.

array/dropRightWhile.js

@@ -5,40 +5,49 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * Elements are dropped until `predicate` returns falsey. The predicate is
    * bound to `thisArg` and invoked with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
-   * callback returns `true` for elements that have the properties of the given
+   * 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 match the properties of the given
    * object, else `false`.
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {Function|Object|string} [predicate=_.identity] The function invoked
-   *  per element.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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 = [
-   *   { 'user': 'barney',  'status': 'busy', 'active': false },
-   *   { 'user': 'fred',    'status': 'busy', 'active': true },
-   *   { 'user': 'pebbles', 'status': 'away', 'active': true }
+   *   { 'user': 'barney',  'active': true },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': false }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.dropRightWhile(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.dropRightWhile(users, { 'user': pebbles, 'active': false }), 'user');
+   * // => ['barney', 'fred']
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.dropRightWhile(users, 'active', false), 'user');
    * // => ['barney']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.dropRightWhile(users, { 'status': 'away' }), 'user');
-   * // => ['barney', 'fred']
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.dropRightWhile(users, 'active'), 'user');
+   * // => ['barney', 'fred', 'pebbles']
    */
   function dropRightWhile(array, predicate, thisArg) {
     var length = array ? array.length : 0;

array/dropWhile.js

@@ -5,40 +5,49 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * Elements are dropped until `predicate` returns falsey. The predicate is
    * bound to `thisArg` and invoked with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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 _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {Function|Object|string} [predicate=_.identity] The function invoked
-   *  per element.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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 = [
-   *   { 'user': 'barney',  'status': 'busy', 'active': true },
-   *   { 'user': 'fred',    'status': 'busy', 'active': false },
-   *   { 'user': 'pebbles', 'status': 'away', 'active': true }
+   *   { 'user': 'barney',  'active': false },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': true }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.dropWhile(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.dropWhile(users, { 'user': 'barney', 'active': false }), 'user');
    * // => ['fred', 'pebbles']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.dropWhile(users, { 'status': 'busy' }), 'user');
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.dropWhile(users, 'active', false), 'user');
    * // => ['pebbles']
+   *
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.dropWhile(users, 'active'), 'user');
+   * // => ['barney', 'fred', 'pebbles']
    */
   function dropWhile(array, predicate, thisArg) {
     var length = array ? array.length : 0;

array/fill.js

@@ -0,0 +1,31 @@
+define(['../internal/baseFill', '../internal/isIterateeCall'], function(baseFill, isIterateeCall) {
+
+  /**
+   * Fills elements of `array` with `value` from `start` up to, but not
+   * including, `end`.
+   *
+   * **Note:** This method mutates `array`.
+   *
+   * @static
+   * @memberOf _
+   * @category Array
+   * @param {Array} array The array to fill.
+   * @param {*} value The value to fill `array` with.
+   * @param {number} [start=0] The start position.
+   * @param {number} [end=array.length] The end position.
+   * @returns {Array} Returns `array`.
+   */
+  function fill(array, value, start, end) {
+    var length = array ? array.length : 0;
+    if (!length) {
+      return [];
+    }
+    if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+      start = 0;
+      end = length;
+    }
+    return baseFill(array, value, start, end);
+  }
+
+  return fill;
+});

array/findIndex.js

@@ -4,10 +4,14 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * This method is like `_.find` except that it returns the index of the first
    * element `predicate` returns truthy for, instead of the element itself.
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -16,28 +20,33 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * @category Array
    * @param {Array} array The array to search.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {number} Returns the index of the found element, else `-1`.
    * @example
    *
    * var users = [
-   *   { 'user': 'barney',  'age': 36, 'active': false },
-   *   { 'user': 'fred',    'age': 40, 'active': true },
-   *   { 'user': 'pebbles', 'age': 1,  'active': false }
+   *   { 'user': 'barney',  'active': false },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': true }
    * ];
    *
-   * _.findIndex(users, function(chr) { return chr.age < 40; });
+   * _.findIndex(users, function(chr) {
+   *   return chr.user == 'barney';
+   * });
    * // => 0
    *
-   * // using the "_.matches" callback shorthand
-   * _.findIndex(users, { 'age': 1 });
-   * // => 2
-   *
-   * // using the "_.property" callback shorthand
-   * _.findIndex(users, 'active');
+   * // using the `_.matches` callback shorthand
+   * _.findIndex(users, { 'user': 'fred', 'active': false });
    * // => 1
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.findIndex(users, 'active', false);
+   * // => 0
+   *
+   * // using the `_.property` callback shorthand
+   * _.findIndex(users, 'active');
+   * // => 2
    */
   function findIndex(array, predicate, thisArg) {
     var index = -1,

array/findLastIndex.js

@@ -4,10 +4,14 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * This method is like `_.findIndex` except that it iterates over elements
    * of `collection` from right to left.
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -16,26 +20,31 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * @category Array
    * @param {Array} array The array to search.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {number} Returns the index of the found element, else `-1`.
    * @example
    *
    * var users = [
-   *   { 'user': 'barney',  'age': 36, 'active': true },
-   *   { 'user': 'fred',    'age': 40, 'active': false },
-   *   { 'user': 'pebbles', 'age': 1,  'active': false }
+   *   { 'user': 'barney',  'active': true },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': false }
    * ];
    *
-   * _.findLastIndex(users, function(chr) { return chr.age < 40; });
+   * _.findLastIndex(users, function(chr) {
+   *   return chr.user == 'pebbles';
+   * });
    * // => 2
    *
-   * // using the "_.matches" callback shorthand
-   * _.findLastIndex(users, { 'age': 40 });
+   * // using the `_.matches` callback shorthand
+   * _.findLastIndex(users, { user': 'barney', 'active': true });
+   * // => 0
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.findLastIndex(users, 'active', false);
    * // => 1
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.findLastIndex(users, 'active');
    * // => 0
    */

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) {

array/flattenDeep.js

@@ -10,7 +10,7 @@ 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) {

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);
-   * // => 1
+   * _.indexOf([1, 2, 1, 2], 2);
+   * // => 2
    *
    * // 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) {

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 = [],

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) {

array/pull.js

@@ -25,6 +25,7 @@ define(['../internal/baseIndexOf'], function(baseIndexOf) {
    * @example
    *
    * var array = [1, 2, 3, 1, 2, 3];
+   *
    * _.pull(array, 2, 3);
    * console.log(array);
    * // => [1, 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

@@ -11,10 +11,14 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * and returns an array of the removed elements. The predicate is bound to
    * `thisArg` and invoked with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -25,14 +29,15 @@ define(['../internal/baseCallback'], function(baseCallback) {
    * @category Array
    * @param {Array} array The array to modify.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {Array} Returns the new array of removed elements.
    * @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

@@ -7,10 +7,14 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    * to compute their sort ranking. The iteratee is bound to `thisArg` and
    * invoked with one argument; (value).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -20,8 +24,7 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    * @param {Array} array The sorted array to inspect.
    * @param {*} value The value to evaluate.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {number} Returns the index at which `value` should be inserted
    *  into `array`.
@@ -30,7 +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 } };
@@ -41,7 +44,7 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    * }, dict);
    * // => 1
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.sortedIndex([{ 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
    * // => 1
    */

array/sortedLastIndex.js

@@ -11,14 +11,13 @@ define(['../internal/baseCallback', '../internal/binaryIndex', '../internal/bina
    * @param {Array} array The sorted array to inspect.
    * @param {*} value The value to evaluate.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {number} Returns the index at which `value` should be inserted
    *  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/take.js

@@ -5,7 +5,6 @@ define(['../internal/baseSlice', '../internal/isIterateeCall'], function(baseSli
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {number} [n=1] The number of elements to take.

array/takeRight.js

@@ -5,7 +5,6 @@ define(['../internal/baseSlice', '../internal/isIterateeCall'], function(baseSli
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {number} [n=1] The number of elements to take.

array/takeRightWhile.js

@@ -5,40 +5,49 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * taken until `predicate` returns falsey. The predicate is bound to `thisArg`
    * and invoked with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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 _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {Function|Object|string} [predicate=_.identity] The function invoked
-   *  per element.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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 = [
-   *   { 'user': 'barney',  'status': 'busy', 'active': false },
-   *   { 'user': 'fred',    'status': 'busy', 'active': true },
-   *   { 'user': 'pebbles', 'status': 'away', 'active': true }
+   *   { 'user': 'barney',  'active': true },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': false }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.takeRightWhile(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.takeRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user');
+   * // => ['pebbles']
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.takeRightWhile(users, 'active', false), 'user');
    * // => ['fred', 'pebbles']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.takeRightWhile(users, { 'status': 'away' }), 'user');
-   * // => ['pebbles']
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.takeRightWhile(users, 'active'), 'user');
+   * // => []
    */
   function takeRightWhile(array, predicate, thisArg) {
     var length = array ? array.length : 0;

array/takeWhile.js

@@ -5,40 +5,49 @@ define(['../internal/baseCallback', '../internal/baseSlice'], function(baseCallb
    * are taken until `predicate` returns falsey. The predicate is bound to
    * `thisArg` and invoked with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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 _
-   * @type Function
    * @category Array
    * @param {Array} array The array to query.
    * @param {Function|Object|string} [predicate=_.identity] The function invoked
-   *  per element.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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 = [
-   *   { 'user': 'barney',  'status': 'busy', 'active': true },
-   *   { 'user': 'fred',    'status': 'busy', 'active': false },
-   *   { 'user': 'pebbles', 'status': 'away', 'active': true }
+   *   { 'user': 'barney',  'active': false },
+   *   { 'user': 'fred',    'active': false},
+   *   { 'user': 'pebbles', 'active': true }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.takeWhile(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.takeWhile(users, { 'user': 'barney', 'active': false }), 'user');
    * // => ['barney']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.takeWhile(users, { 'status': 'busy' }), 'user');
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.takeWhile(users, 'active', false), 'user');
    * // => ['barney', 'fred']
+   *
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.takeWhile(users, 'active'), 'user');
+   * // => []
    */
   function takeWhile(array, predicate, thisArg) {
     var length = array ? array.length : 0;

array/union.js

@@ -16,8 +16,8 @@ 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));

array/uniq.js

@@ -8,10 +8,14 @@ define(['../internal/baseCallback', '../internal/baseUniq', '../internal/isItera
    * uniqueness is computed. The `iteratee` is bound to `thisArg` and invoked
    * with three arguments; (value, index, array).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -27,8 +31,6 @@ define(['../internal/baseCallback', '../internal/baseUniq', '../internal/isItera
    * @param {Array} array The array to inspect.
    * @param {boolean} [isSorted] Specify the array is sorted.
    * @param {Function|Object|string} [iteratee] The function invoked per iteration.
-   *  If a property name or object is provided it is used to create a "_.property"
-   *  or "_.matches" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {Array} Returns the new duplicate-value-free array.
    * @example
@@ -41,10 +43,12 @@ 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
+   * // using the `_.property` callback shorthand
    * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
    * // => [{ 'x': 1 }, { 'x': 2 }]
    */
@@ -53,8 +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.js

@@ -1,8 +1,11 @@
-define(['./chain/chain', './chain/lodash', './chain/reverse', './chain/tap', './chain/thru', './chain/toJSON', './chain/toString', './chain/value', './chain/valueOf', './chain/wrapperChain'], function(chain, lodash, reverse, tap, thru, toJSON, toString, value, valueOf, wrapperChain) {
+define(['./chain/chain', './chain/commit', './chain/lodash', './chain/plant', './chain/reverse', './chain/run', './chain/tap', './chain/thru', './chain/toJSON', './chain/toString', './chain/value', './chain/valueOf', './chain/wrapperChain'], function(chain, commit, lodash, plant, reverse, run, tap, thru, toJSON, toString, value, valueOf, wrapperChain) {
   return {
     'chain': chain,
+    'commit': commit,
     'lodash': lodash,
+    'plant': plant,
     'reverse': reverse,
+    'run': run,
     'tap': tap,
     'thru': thru,
     'toJSON': toJSON,

chain/chain.js

@@ -8,7 +8,7 @@ define(['./lodash'], function(lodash) {
    * @memberOf _
    * @category Chain
    * @param {*} value The value to wrap.
-   * @returns {Object} Returns the new `lodash` object.
+   * @returns {Object} Returns the new `lodash` wrapper instance.
    * @example
    *
    * var users = [
@@ -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/commit.js

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

chain/lodash.js

@@ -1,4 +1,4 @@
-define(['../internal/LodashWrapper', '../internal/arrayCopy', '../lang/isArray', '../internal/isObjectLike'], function(LodashWrapper, arrayCopy, isArray, isObjectLike) {
+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;
@@ -7,7 +7,7 @@ define(['../internal/LodashWrapper', '../internal/arrayCopy', '../lang/isArray',
   var hasOwnProperty = objectProto.hasOwnProperty;
 
   /**
-   * Creates a `lodash` object which wraps `value` to enable intuitive chaining.
+   * Creates a `lodash` object which wraps `value` to enable implicit chaining.
    * Methods that operate on and return arrays, collections, and functions can
    * be chained together. Methods that return a boolean or single value will
    * automatically end the chain returning the unwrapped value. Explicit chaining
@@ -26,29 +26,31 @@ define(['../internal/LodashWrapper', '../internal/arrayCopy', '../lang/isArray',
    * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
    * and `unshift`
    *
-   * The wrapper functions that support shortcut fusion are:
-   * `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, `first`,
-   * `initial`, `last`, `map`, `pluck`, `reject`, `rest`, `reverse`, `slice`,
-   * `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `where`
+   * The wrapper methods that support shortcut fusion are:
+   * `compact`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`,
+   * `first`, `initial`, `last`, `map`, `pluck`, `reject`, `rest`, `reverse`,
+   * `slice`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `toArray`,
+   * and `where`
    *
-   * The chainable wrapper functions are:
+   * The chainable wrapper methods are:
    * `after`, `ary`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`,
-   * `callback`, `chain`, `chunk`, `compact`, `concat`, `constant`, `countBy`,
-   * `create`, `curry`, `debounce`, `defaults`, `defer`, `delay`, `difference`,
-   * `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, `flatten`,
-   * `flattenDeep`, `flow`, `flowRight`, `forEach`, `forEachRight`, `forIn`,
-   * `forInRight`, `forOwn`, `forOwnRight`, `functions`, `groupBy`, `indexBy`,
-   * `initial`, `intersection`, `invert`, `invoke`, `keys`, `keysIn`, `map`,
-   * `mapValues`, `matches`, `memoize`, `merge`, `mixin`, `negate`, `noop`,
-   * `omit`, `once`, `pairs`, `partial`, `partialRight`, `partition`, `pick`,
-   * `pluck`, `property`, `propertyOf`, `pull`, `pullAt`, `push`, `range`,
-   * `rearg`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
-   * `sortBy`, `sortByAll`, `splice`, `take`, `takeRight`, `takeRightWhile`,
-   * `takeWhile`, `tap`, `throttle`, `thru`, `times`, `toArray`, `toPlainObject`,
-   * `transform`, `union`, `uniq`, `unshift`, `unzip`, `values`, `valuesIn`,
-   * `where`, `without`, `wrap`, `xor`, `zip`, and `zipObject`
+   * `callback`, `chain`, `chunk`, `commit`, `compact`, `concat`, `constant`,
+   * `countBy`, `create`, `curry`, `debounce`, `defaults`, `defer`, `delay`,
+   * `difference`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `fill`,
+   * `filter`, `flatten`, `flattenDeep`, `flow`, `flowRight`, `forEach`,
+   * `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `functions`,
+   * `groupBy`, `indexBy`, `initial`, `intersection`, `invert`, `invoke`, `keys`,
+   * `keysIn`, `map`, `mapValues`, `matches`, `matchesProperty`, `memoize`, `merge`,
+   * `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`
    *
-   * The wrapper functions that are **not** chainable by default are:
+   * The wrapper methods that are **not** chainable by default are:
    * `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `deburr`,
    * `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`,
    * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`,
@@ -63,24 +65,28 @@ define(['../internal/LodashWrapper', '../internal/arrayCopy', '../lang/isArray',
    * `startCase`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
    * `trunc`, `unescape`, `uniqueId`, `value`, and `words`
    *
-   * The wrapper function `sample` will return a wrapped value when `n` is provided,
+   * The wrapper method `sample` will return a wrapped value when `n` is provided,
    * otherwise an unwrapped value is returned.
    *
    * @name _
    * @constructor
    * @category Chain
    * @param {*} value The value to wrap in a `lodash` instance.
-   * @returns {Object} Returns a `lodash` instance.
+   * @returns {Object} Returns the new `lodash` wrapper instance.
    * @example
    *
    * 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
@@ -89,19 +95,19 @@ define(['../internal/LodashWrapper', '../internal/arrayCopy', '../lang/isArray',
    * // => true
    */
   function lodash(value) {
-    if (isObjectLike(value) && !isArray(value)) {
+    if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
       if (value instanceof LodashWrapper) {
         return value;
       }
-      if (hasOwnProperty.call(value, '__wrapped__')) {
-        return new LodashWrapper(value.__wrapped__, value.__chain__, arrayCopy(value.__actions__));
+      if (hasOwnProperty.call(value, '__chain__') && hasOwnProperty.call(value, '__wrapped__')) {
+        return wrapperClone(value);
       }
     }
     return new LodashWrapper(value);
   }
 
-  // Ensure `new LodashWrapper` is an instance of `lodash`.
-  LodashWrapper.prototype = lodash.prototype;
+  // Ensure wrappers are instances of `baseLodash`.
+  lodash.prototype = baseLodash.prototype;
 
   return lodash;
 });

chain/plant.js

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

chain/run.js

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

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/wrapperChain.js

@@ -6,7 +6,7 @@ define(['./chain'], function(chain) {
    * @name chain
    * @memberOf _
    * @category Chain
-   * @returns {*} Returns the `lodash` object.
+   * @returns {Object} Returns the new `lodash` wrapper instance.
    * @example
    *
    * var users = [

chain/wrapperCommit.js

@@ -0,0 +1,33 @@
+define(['../internal/LodashWrapper'], function(LodashWrapper) {
+
+  /**
+   * Executes the chained sequence and returns the wrapped result.
+   *
+   * @name commit
+   * @memberOf _
+   * @category Chain
+   * @returns {Object} Returns the new `lodash` wrapper instance.
+   * @example
+   *
+   * var array = [1, 2];
+   * var wrapper = _(array).push(3);
+   *
+   * console.log(array);
+   * // => [1, 2]
+   *
+   * wrapper = wrapper.commit();
+   * console.log(array);
+   * // => [1, 2, 3]
+   *
+   * wrapper.last();
+   * // => 3
+   *
+   * console.log(array);
+   * // => [1, 2, 3]
+   */
+  function wrapperCommit() {
+    return new LodashWrapper(this.value(), this.__chain__);
+  }
+
+  return wrapperCommit;
+});

chain/wrapperPlant.js

@@ -0,0 +1,45 @@
+define(['../internal/baseLodash', '../internal/wrapperClone'], function(baseLodash, wrapperClone) {
+
+  /**
+   * Creates a clone of the chained sequence planting `value` as the wrapped value.
+   *
+   * @name plant
+   * @memberOf _
+   * @category Chain
+   * @returns {Object} Returns the new `lodash` wrapper instance.
+   * @example
+   *
+   * var array = [1, 2];
+   * var wrapper = _(array).map(function(value) {
+   *   return Math.pow(value, 2);
+   * });
+   *
+   * var other = [3, 4];
+   * var otherWrapper = wrapper.plant(other);
+   *
+   * otherWrapper.value();
+   * // => [9, 16]
+   *
+   * wrapper.value();
+   * // => [1, 4]
+   */
+  function wrapperPlant(value) {
+    var result,
+        parent = this;
+
+    while (parent instanceof baseLodash) {
+      var clone = wrapperClone(parent);
+      if (result) {
+        previous.__wrapped__ = clone;
+      } else {
+        result = clone;
+      }
+      var previous = clone;
+      parent = parent.__wrapped__;
+    }
+    previous.__wrapped__ = value;
+    return result;
+  }
+
+  return wrapperPlant;
+});

chain/wrapperReverse.js

@@ -9,7 +9,7 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', './thru'], funct
    * @name reverse
    * @memberOf _
    * @category Chain
-   * @returns {Object} Returns the new reversed `lodash` object.
+   * @returns {Object} Returns the new reversed `lodash` wrapper instance.
    * @example
    *
    * var array = [1, 2, 3];
@@ -26,7 +26,7 @@ define(['../internal/LazyWrapper', '../internal/LodashWrapper', './thru'], funct
       if (this.__actions__.length) {
         value = new LazyWrapper(this);
       }
-      return new LodashWrapper(value.reverse());
+      return new LodashWrapper(value.reverse(), this.__chain__);
     }
     return this.thru(function(value) {
       return value.reverse();

chain/wrapperValue.js

@@ -5,7 +5,7 @@ define(['../internal/baseWrapperValue'], function(baseWrapperValue) {
    *
    * @name value
    * @memberOf _
-   * @alias toJSON, valueOf
+   * @alias run, toJSON, valueOf
    * @category Chain
    * @returns {*} Returns the resolved unwrapped value.
    * @example

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

@@ -13,10 +13,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * The `iteratee` is bound to `thisArg` and invoked with three arguments;
    * (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -25,16 +29,19 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @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/every.js

@@ -5,10 +5,14 @@ define(['../internal/arrayEvery', '../internal/baseCallback', '../internal/baseE
    * The predicate is bound to `thisArg` and invoked with three arguments;
    * (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -18,27 +22,30 @@ define(['../internal/arrayEvery', '../internal/baseCallback', '../internal/baseE
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {boolean} Returns `true` if all elements pass the predicate check,
    *  else `false`.
    * @example
    *
-   * _.every([true, 1, null, 'yes']);
+   * _.every([true, 1, null, 'yes'], Boolean);
    * // => false
    *
    * var users = [
-   *   { 'user': 'barney', 'age': 36 },
-   *   { 'user': 'fred',   'age': 40 }
+   *   { 'user': 'barney', 'active': false },
+   *   { 'user': 'fred',   'active': false }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.every(users, 'age');
+   * // using the `_.matches` callback shorthand
+   * _.every(users, { 'user': 'barney', 'active': false });
+   * // => false
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.every(users, 'active', false);
    * // => true
    *
-   * // using the "_.matches" callback shorthand
-   * _.every(users, { 'age': 36 });
+   * // using the `_.property` callback shorthand
+   * _.every(users, 'active');
    * // => false
    */
   function every(collection, predicate, thisArg) {

collection/filter.js

@@ -5,10 +5,14 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * `predicate` returns truthy for. The predicate is bound to `thisArg` and
    * invoked with three arguments; (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -18,26 +22,31 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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': false },
-   *   { 'user': 'fred',   'age': 40, 'active': true }
+   *   { 'user': 'barney', 'age': 36, 'active': true },
+   *   { 'user': 'fred',   'age': 40, 'active': false }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.filter(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.filter(users, { 'age': 36, 'active': true }), 'user');
+   * // => ['barney']
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.filter(users, 'active', false), 'user');
    * // => ['fred']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.filter(users, { 'age': 36 }), 'user');
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.filter(users, 'active'), 'user');
    * // => ['barney']
    */
   function filter(collection, predicate, thisArg) {

collection/find.js

@@ -8,10 +8,14 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseFin
    * `predicate` returns truthy for. The predicate is bound to `thisArg` and
    * invoked with three arguments; (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -21,28 +25,33 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseFin
    * @category Collection
    * @param {Array|Object|string} collection The collection to search.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {*} Returns the matched element, else `undefined`.
    * @example
    *
    * var users = [
-   *   { 'user': 'barney',  'age': 36, 'active': false },
-   *   { 'user': 'fred',    'age': 40, 'active': true },
-   *   { 'user': 'pebbles', 'age': 1,  'active': false }
+   *   { 'user': 'barney',  'age': 36, 'active': true },
+   *   { 'user': 'fred',    'age': 40, 'active': false },
+   *   { '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
-   * _.result(_.find(users, { 'age': 1 }), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.result(_.find(users, { 'age': 1, 'active': true }), 'user');
    * // => 'pebbles'
    *
-   * // using the "_.property" callback shorthand
-   * _.result(_.find(users, 'active'), 'user');
+   * // using the `_.matchesProperty` callback shorthand
+   * _.result(_.find(users, 'active', false), 'user');
    * // => 'fred'
+   *
+   * // using the `_.property` callback shorthand
+   * _.result(_.find(users, 'active'), 'user');
+   * // => 'barney'
    */
   function find(collection, predicate, thisArg) {
     if (isArray(collection)) {

collection/findLast.js

@@ -9,13 +9,14 @@ define(['../internal/baseCallback', '../internal/baseEachRight', '../internal/ba
    * @category Collection
    * @param {Array|Object|string} collection The collection to search.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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/findWhere.js

@@ -5,6 +5,11 @@ define(['../internal/baseMatches', './find'], function(baseMatches, find) {
    * source object, returning the first element that has equivalent property
    * values.
    *
+   * **Note:** This method supports comparing arrays, booleans, `Date` objects,
+   * numbers, `Object` objects, regexes, and strings. Objects are compared by
+   * their own, not inherited, enumerable properties. For comparing a single
+   * own or inherited property value see `_.matchesProperty`.
+   *
    * @static
    * @memberOf _
    * @category Collection
@@ -14,14 +19,14 @@ define(['../internal/baseMatches', './find'], function(baseMatches, find) {
    * @example
    *
    * var users = [
-   *   { 'user': 'barney', 'age': 36, 'status': 'busy' },
-   *   { 'user': 'fred',   'age': 40, 'status': 'busy' }
+   *   { 'user': 'barney', 'age': 36, 'active': true },
+   *   { 'user': 'fred',   'age': 40, 'active': false }
    * ];
    *
-   * _.result(_.findWhere(users, { 'status': 'busy' }), 'user');
+   * _.result(_.findWhere(users, { 'age': 36, 'active': true }), 'user');
    * // => 'barney'
    *
-   * _.result(_.findWhere(users, { 'age': 40 }), 'user');
+   * _.result(_.findWhere(users, { 'age': 40, 'active': false }), 'user');
    * // => 'fred'
    */
   function findWhere(collection, source) {

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

@@ -13,10 +13,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * The `iteratee` is bound to `thisArg` and invoked with three arguments;
    * (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -25,19 +29,22 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @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
+   * // using the `_.property` callback shorthand
    * _.groupBy(['one', 'two', 'three'], 'length');
    * // => { '3': ['one', 'two'], '5': ['three'] }
    */

collection/indexBy.js

@@ -7,10 +7,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * iteratee function is bound to `thisArg` and invoked with three arguments;
    * (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -19,8 +23,7 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {Object} Returns the composed aggregate object.
    * @example
@@ -33,10 +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

@@ -5,37 +5,54 @@ define(['../internal/arrayMap', '../internal/baseCallback', '../internal/baseMap
    * `iteratee`. The `iteratee` is bound to `thisArg` and invoked with three
    * arguments; (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
+   * Many lodash methods are guarded to work as interatees for methods like
+   * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+   *
+   * The guarded methods are:
+   * `ary`, `callback`, `chunk`, `clone`, `create`, `curry`, `curryRight`, `drop`,
+   * `dropRight`, `fill`, `flatten`, `invert`, `max`, `min`, `parseInt`, `slice`,
+   * `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimLeft`, `trimRight`,
+   * `trunc`, `random`, `range`, `sample`, `uniq`, and `words`
+   *
    * @static
    * @memberOf _
    * @alias collect
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
+   *  create a `_.property` or `_.matches` style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @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' },
    *   { 'user': 'fred' }
    * ];
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.map(users, 'user');
    * // => ['barney', 'fred']
    */

collection/max.js

@@ -7,10 +7,14 @@ define(['../internal/arrayMax', '../internal/createExtremum'], function(arrayMax
    * 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"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -19,8 +23,6 @@ define(['../internal/arrayMax', '../internal/createExtremum'], function(arrayMax
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @param {Function|Object|string} [iteratee] The function invoked per iteration.
-   *  If a property name or object is provided it is used to create a "_.property"
-   *  or "_.matches" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {*} Returns the maximum value.
    * @example
@@ -36,10 +38,12 @@ define(['../internal/arrayMax', '../internal/createExtremum'], function(arrayMax
    *   { 'user': 'fred',   'age': 40 }
    * ];
    *
-   * _.max(users, function(chr) { return chr.age; });
+   * _.max(users, function(chr) {
+   *   return chr.age;
+   * });
    * // => { 'user': 'fred', 'age': 40 };
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.max(users, 'age');
    * // => { 'user': 'fred', 'age': 40 };
    */

collection/min.js

@@ -7,10 +7,14 @@ define(['../internal/arrayMin', '../internal/createExtremum'], function(arrayMin
    * 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"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -19,8 +23,6 @@ define(['../internal/arrayMin', '../internal/createExtremum'], function(arrayMin
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @param {Function|Object|string} [iteratee] The function invoked per iteration.
-   *  If a property name or object is provided it is used to create a "_.property"
-   *  or "_.matches" style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @returns {*} Returns the minimum value.
    * @example
@@ -36,10 +38,12 @@ define(['../internal/arrayMin', '../internal/createExtremum'], function(arrayMin
    *   { 'user': 'fred',   'age': 40 }
    * ];
    *
-   * _.min(users, function(chr) { return chr.age; });
+   * _.min(users, function(chr) {
+   *   return chr.age;
+   * });
    * // => { 'user': 'barney', 'age': 36 };
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.min(users, 'age');
    * // => { 'user': 'barney', 'age': 36 };
    */

collection/partition.js

@@ -6,10 +6,14 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * contains elements `predicate` returns falsey for. The predicate is bound
    * to `thisArg` and invoked with three arguments; (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -18,16 +22,19 @@ define(['../internal/createAggregator'], function(createAggregator) {
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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);
+   * _.partition([1.2, 2.3, 3.4], function(n) {
+   *   return this.floor(n) % 2;
+   * }, Math);
    * // => [[1, 3], [2]]
    *
    * var users = [
@@ -36,12 +43,20 @@ define(['../internal/createAggregator'], function(createAggregator) {
    *   { 'user': 'pebbles', 'age': 1,  'active': false }
    * ];
    *
-   * // using the "_.matches" callback shorthand
-   * _.map(_.partition(users, { 'age': 1 }), 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);
    * // => [['pebbles'], ['barney', 'fred']]
    *
-   * // using the "_.property" callback shorthand
-   * _.map(_.partition(users, 'active'), function(array) { return _.pluck(array, 'user'); });
+   * // using the `_.matchesProperty` callback shorthand
+   * _.map(_.partition(users, 'active', false), mapper);
+   * // => [['barney', 'pebbles'], ['fred']]
+   *
+   * // using the `_.property` callback shorthand
+   * _.map(_.partition(users, 'active'), mapper);
    * // => [['fred'], ['barney', 'pebbles']]
    */
   var partition = createAggregator(function(result, value, key) {

collection/pluck.js

@@ -24,7 +24,7 @@ define(['../internal/baseProperty', './map'], function(baseProperty, map) {
    * // => [36, 40] (iteration order is not guaranteed)
    */
   function pluck(collection, key) {
-    return map(collection, baseProperty(key + ''));
+    return map(collection, baseProperty(key));
   }
 
   return pluck;

collection/reduce.js

@@ -8,6 +8,12 @@ define(['../internal/arrayReduce', '../internal/baseCallback', '../internal/base
    * value. The `iteratee` is bound to `thisArg`and invoked with four arguments;
    * (accumulator, value, index|key, collection).
    *
+   * Many lodash methods are guarded to work as interatees for methods like
+   * `_.reduce`, `_.reduceRight`, and `_.transform`.
+   *
+   * The guarded methods are:
+   * `assign`, `defaults`, `merge`, and `sortAllBy`
+   *
    * @static
    * @memberOf _
    * @alias foldl, inject
@@ -19,14 +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

@@ -4,10 +4,14 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * The opposite of `_.filter`; this method returns the elements of `collection`
    * that `predicate` does **not** return truthy for.
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -16,13 +20,14 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @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 = [
@@ -30,13 +35,17 @@ define(['../internal/arrayFilter', '../internal/baseCallback', '../internal/base
    *   { 'user': 'fred',   'age': 40, 'active': true }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.pluck(_.reject(users, 'active'), 'user');
+   * // using the `_.matches` callback shorthand
+   * _.pluck(_.reject(users, { 'age': 40, 'active': true }), 'user');
    * // => ['barney']
    *
-   * // using the "_.matches" callback shorthand
-   * _.pluck(_.reject(users, { 'age': 36 }), 'user');
+   * // using the `_.matchesProperty` callback shorthand
+   * _.pluck(_.reject(users, 'active', false), 'user');
    * // => ['fred']
+   *
+   * // using the `_.property` callback shorthand
+   * _.pluck(_.reject(users, 'active'), 'user');
+   * // => ['barney']
    */
   function reject(collection, predicate, thisArg) {
     var func = isArray(collection) ? arrayFilter : baseFilter;

collection/size.js

@@ -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

@@ -6,10 +6,14 @@ define(['../internal/arraySome', '../internal/baseCallback', '../internal/baseSo
    * over the entire collection. The predicate is bound to `thisArg` and invoked
    * with three arguments; (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -19,8 +23,7 @@ define(['../internal/arraySome', '../internal/baseCallback', '../internal/baseSo
    * @category Collection
    * @param {Array|Object|string} collection The collection to iterate over.
    * @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 "_.property" or "_.matches" style callback respectively.
+   *  per iteration.
    * @param {*} [thisArg] The `this` binding of `predicate`.
    * @returns {boolean} Returns `true` if any element passes the predicate check,
    *  else `false`.
@@ -30,17 +33,21 @@ define(['../internal/arraySome', '../internal/baseCallback', '../internal/baseSo
    * // => true
    *
    * var users = [
-   *   { 'user': 'barney', 'age': 36, 'active': false },
-   *   { 'user': 'fred',   'age': 40, 'active': true }
+   *   { 'user': 'barney', 'active': true },
+   *   { 'user': 'fred',   'active': false }
    * ];
    *
-   * // using the "_.property" callback shorthand
-   * _.some(users, 'active');
+   * // using the `_.matches` callback shorthand
+   * _.some(users, { user': 'barney', 'active': false });
+   * // => false
+   *
+   * // using the `_.matchesProperty` callback shorthand
+   * _.some(users, 'active', false);
    * // => true
    *
-   * // using the "_.matches" callback shorthand
-   * _.some(users, { 'age': 1 });
-   * // => false
+   * // using the `_.property` callback shorthand
+   * _.some(users, 'active');
+   * // => true
    */
   function some(collection, predicate, thisArg) {
     var func = isArray(collection) ? arraySome : baseSome;

collection/sortBy.js

@@ -7,10 +7,14 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseSor
    * The `iteratee` is bound to `thisArg` and invoked with three arguments;
    * (value, index|key, collection).
    *
-   * If a property name is provided for `predicate` the created "_.property"
+   * If a property name is provided for `predicate` the created `_.property`
    * style callback returns the property value of the given element.
    *
-   * If an object is provided for `predicate` the created "_.matches" style
+   * 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`.
    *
@@ -20,15 +24,19 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseSor
    * @param {Array|Object|string} collection The collection to iterate over.
    * @param {Array|Function|Object|string} [iteratee=_.identity] The function
    *  invoked per iteration. If a property name or an object is provided it is
-   *  used to create a "_.property" or "_.matches" style callback respectively.
+   *  used to create a `_.property` or `_.matches` style callback respectively.
    * @param {*} [thisArg] The `this` binding of `iteratee`.
    * @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 = [
@@ -37,7 +45,7 @@ define(['../internal/baseCallback', '../internal/baseEach', '../internal/baseSor
    *   { 'user': 'barney' }
    * ];
    *
-   * // using the "_.property" callback shorthand
+   * // using the `_.property` callback shorthand
    * _.pluck(_.sortBy(users, 'user'), 'user');
    * // => ['barney', 'fred', 'pebbles']
    */

collection/sortByAll.js

@@ -36,7 +36,7 @@ define(['../internal/baseEach', '../internal/baseFlatten', '../internal/baseSort
         props = baseFlatten(args, false, false, 1),
         result = isLength(length) ? Array(length) : [];
 
-    baseEach(collection, function(value, key, collection) {
+    baseEach(collection, function(value) {
       var length = props.length,
           criteria = Array(length);
 

collection/where.js

@@ -5,6 +5,11 @@ define(['../internal/baseMatches', './filter'], function(baseMatches, filter) {
    * source object, returning an array of all elements that have equivalent
    * property values.
    *
+   * **Note:** This method supports comparing arrays, booleans, `Date` objects,
+   * numbers, `Object` objects, regexes, and strings. Objects are compared by
+   * their own, not inherited, enumerable properties. For comparing a single
+   * own or inherited property value see `_.matchesProperty`.
+   *
    * @static
    * @memberOf _
    * @category Collection
@@ -14,18 +19,15 @@ define(['../internal/baseMatches', './filter'], function(baseMatches, filter) {
    * @example
    *
    * var users = [
-   *   { 'user': 'barney', 'age': 36, 'status': 'busy', 'pets': ['hoppy'] },
-   *   { 'user': 'fred',   'age': 40, 'status': 'busy', 'pets': ['baby puss', 'dino'] }
+   *   { 'user': 'barney', 'age': 36, 'active': false, 'pets': ['hoppy'] },
+   *   { 'user': 'fred',   'age': 40, 'active': true, 'pets': ['baby puss', 'dino'] }
    * ];
    *
-   * _.pluck(_.where(users, { 'age': 36 }), 'user');
+   * _.pluck(_.where(users, { 'age': 36, 'active': false }), 'user');
    * // => ['barney']
    *
    * _.pluck(_.where(users, { 'pets': ['dino'] }), 'user');
    * // => ['fred']
-   *
-   * _.pluck(_.where(users, { 'status': 'busy' }), 'user');
-   * // => ['barney', 'fred']
    */
   function where(collection, source) {
     return filter(collection, baseMatches(source));

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.js

@@ -1,4 +1,4 @@
-define(['./function/after', './function/ary', './function/backflow', './function/before', './function/bind', './function/bindAll', './function/bindKey', './function/compose', './function/curry', './function/curryRight', './function/debounce', './function/defer', './function/delay', './function/flow', './function/flowRight', './function/memoize', './function/negate', './function/once', './function/partial', './function/partialRight', './function/rearg', './function/throttle', './function/wrap'], function(after, ary, backflow, before, bind, bindAll, bindKey, compose, curry, curryRight, debounce, defer, delay, flow, flowRight, memoize, negate, once, partial, partialRight, rearg, throttle, wrap) {
+define(['./function/after', './function/ary', './function/backflow', './function/before', './function/bind', './function/bindAll', './function/bindKey', './function/compose', './function/curry', './function/curryRight', './function/debounce', './function/defer', './function/delay', './function/flow', './function/flowRight', './function/memoize', './function/negate', './function/once', './function/partial', './function/partialRight', './function/rearg', './function/spread', './function/throttle', './function/wrap'], function(after, ary, backflow, before, bind, bindAll, bindKey, compose, curry, curryRight, debounce, defer, delay, flow, flowRight, memoize, negate, once, partial, partialRight, rearg, spread, throttle, wrap) {
   return {
     'after': after,
     'ary': ary,
@@ -21,6 +21,7 @@ define(['./function/after', './function/ary', './function/backflow', './function
     'partial': partial,
     'partialRight': partialRight,
     'rearg': rearg,
+    'spread': spread,
     'throttle': throttle,
     'wrap': wrap
   };

function/after.js

@@ -1,4 +1,4 @@
-define(['../lang/isFunction', '../internal/root'], function(isFunction, root) {
+define(['../internal/root'], function(root) {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -30,8 +30,8 @@ define(['../lang/isFunction', '../internal/root'], function(isFunction, root) {
    * // => logs 'done saving!' after the two async saves have completed
    */
   function after(n, func) {
-    if (!isFunction(func)) {
-      if (isFunction(n)) {
+    if (typeof func != 'function') {
+      if (typeof n == 'function') {
         var temp = n;
         n = func;
         func = temp;

function/before.js

@@ -1,4 +1,4 @@
-define(['../lang/isFunction'], function(isFunction) {
+define([], function() {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -21,8 +21,8 @@ define(['../lang/isFunction'], function(isFunction) {
    */
   function before(n, func) {
     var result;
-    if (!isFunction(func)) {
-      if (isFunction(n)) {
+    if (typeof func != 'function') {
+      if (typeof n == 'function') {
         var temp = n;
         n = func;
         func = temp;

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

@@ -1,4 +1,4 @@
-define(['../lang/isFunction', '../lang/isObject', '../date/now'], function(isFunction, isObject, now) {
+define(['../lang/isObject', '../date/now'], function(isObject, now) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -83,7 +83,7 @@ define(['../lang/isFunction', '../lang/isObject', '../date/now'], function(isFun
         maxWait = false,
         trailing = true;
 
-    if (!isFunction(func)) {
+    if (typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     wait = wait < 0 ? 0 : wait;

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

@@ -1,4 +1,4 @@
-define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, isFunction) {
+define(['../internal/arrayEvery', '../internal/baseIsFunction'], function(arrayEvery, baseIsFunction) {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -32,9 +32,9 @@ define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, is
         length = funcs.length;
 
     if (!length) {
-      return function() {};
+      return function() { return arguments[0]; };
     }
-    if (!arrayEvery(funcs, isFunction)) {
+    if (!arrayEvery(funcs, baseIsFunction)) {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     return function() {

function/flowRight.js

@@ -1,4 +1,4 @@
-define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, isFunction) {
+define(['../internal/arrayEvery', '../internal/baseIsFunction'], function(arrayEvery, baseIsFunction) {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -32,9 +32,9 @@ define(['../internal/arrayEvery', '../lang/isFunction'], function(arrayEvery, is
         fromIndex = funcs.length - 1;
 
     if (fromIndex < 0) {
-      return function() {};
+      return function() { return arguments[0]; };
     }
-    if (!arrayEvery(funcs, isFunction)) {
+    if (!arrayEvery(funcs, baseIsFunction)) {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     return function() {

function/memoize.js

@@ -1,4 +1,4 @@
-define(['../internal/MapCache', '../lang/isFunction'], function(MapCache, isFunction) {
+define(['../internal/MapCache'], function(MapCache) {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -57,7 +57,7 @@ define(['../internal/MapCache', '../lang/isFunction'], function(MapCache, isFunc
    * // => { 'user': 'barney' }
    */
   function memoize(func, resolver) {
-    if (!isFunction(func) || (resolver && !isFunction(resolver))) {
+    if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     var memoized = function() {

function/negate.js

@@ -1,4 +1,4 @@
-define(['../lang/isFunction'], function(isFunction) {
+define([], function() {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -23,7 +23,7 @@ define(['../lang/isFunction'], function(isFunction) {
    * // => [1, 3, 5]
    */
   function negate(predicate) {
-    if (!isFunction(predicate)) {
+    if (typeof predicate != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     return function() {

function/once.js

@@ -7,7 +7,6 @@ define(['./before'], function(before) {
    *
    * @static
    * @memberOf _
-   * @type Function
    * @category Function
    * @param {Function} func The function to restrict.
    * @returns {Function} Returns the new restricted function.

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/spread.js

@@ -0,0 +1,46 @@
+define([], function() {
+
+  /** Used as the `TypeError` message for "Functions" methods. */
+  var FUNC_ERROR_TEXT = 'Expected a function';
+
+  /**
+   * Creates a function that invokes `func` with the `this` binding of the
+   * created function and the array of arguments provided to the created
+   * function much like [Function#apply](http://es5.github.io/#x15.3.4.3).
+   *
+   * @static
+   * @memberOf _
+   * @category Function
+   * @param {Function} func The function to spread arguments over.
+   * @returns {*} Returns the new function.
+   * @example
+   *
+   * var spread = _.spread(function(who, what) {
+   *   return who + ' says ' + what;
+   * });
+   *
+   * spread(['Fred', 'hello']);
+   * // => 'Fred says hello'
+   *
+   * // with a Promise
+   * var numbers = Promise.all([
+   *   Promise.resolve(40),
+   *   Promise.resolve(36)
+   * ]);
+   *
+   * numbers.then(_.spread(function(x, y) {
+   *   return x + y;
+   * }));
+   * // => a Promise of 76
+   */
+  function spread(func) {
+    if (typeof func != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    return function(array) {
+      return func.apply(this, array);
+    };
+  }
+
+  return spread;
+});

function/throttle.js

@@ -1,4 +1,4 @@
-define(['./debounce', '../lang/isFunction', '../lang/isObject'], function(debounce, isFunction, isObject) {
+define(['./debounce', '../lang/isObject'], function(debounce, isObject) {
 
   /** Used as the `TypeError` message for "Functions" methods. */
   var FUNC_ERROR_TEXT = 'Expected a function';
@@ -42,8 +42,9 @@ define(['./debounce', '../lang/isFunction', '../lang/isObject'], function(deboun
    * 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);
@@ -52,7 +53,7 @@ define(['./debounce', '../lang/isFunction', '../lang/isObject'], function(deboun
     var leading = true,
         trailing = true;
 
-    if (!isFunction(func)) {
+    if (typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     if (options === false) {

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;
@@ -10,15 +10,18 @@ define([], function() {
    * @param {*} value The value to wrap.
    */
   function LazyWrapper(value) {
-    this.actions = null;
-    this.dir = 1;
-    this.dropCount = 0;
-    this.filtered = false;
-    this.iteratees = null;
-    this.takeCount = POSITIVE_INFINITY;
-    this.views = null;
-    this.wrapped = value;
+    this.__wrapped__ = value;
+    this.__actions__ = null;
+    this.__dir__ = 1;
+    this.__dropCount__ = 0;
+    this.__filtered__ = false;
+    this.__iteratees__ = null;
+    this.__takeCount__ = POSITIVE_INFINITY;
+    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.
@@ -9,10 +9,13 @@ define([], function() {
    * @param {Array} [actions=[]] Actions to peform to resolve the unwrapped value.
    */
   function LodashWrapper(value, chainAll, actions) {
+    this.__wrapped__ = value;
     this.__actions__ = actions || [];
     this.__chain__ = !!chainAll;
-    this.__wrapped__ = value;
   }
 
+  LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+  LodashWrapper.prototype.constructor = LodashWrapper;
+
   return LodashWrapper;
 });

internal/baseAssign.js

@@ -16,7 +16,7 @@ define(['./baseCopy', '../object/keys'], function(baseCopy, keys) {
       return baseCopy(source, object, props);
     }
     var index = -1,
-        length = props.length
+        length = props.length;
 
     while (++index < length) {
       var key = props[index],

internal/baseCallback.js

@@ -1,4 +1,4 @@
-define(['./baseMatches', './baseProperty', './bindCallback', '../utility/identity', './isBindable'], function(baseMatches, baseProperty, bindCallback, identity, isBindable) {
+define(['./baseMatches', './baseMatchesProperty', './baseProperty', './bindCallback', '../utility/identity', './isBindable'], function(baseMatches, baseMatchesProperty, baseProperty, bindCallback, identity, isBindable) {
 
   /**
    * The base implementation of `_.callback` which supports specifying the
@@ -20,10 +20,12 @@ define(['./baseMatches', './baseProperty', './bindCallback', '../utility/identit
     if (func == null) {
       return identity;
     }
-    // Handle "_.property" and "_.matches" style callback shorthands.
-    return type == 'object'
-      ? baseMatches(func)
-      : baseProperty(func + '');
+    if (type == 'object') {
+      return baseMatches(func);
+    }
+    return typeof thisArg == 'undefined'
+      ? baseProperty(func + '')
+      : baseMatchesProperty(func + '', thisArg);
   }
 
   return baseCallback;

internal/baseDelay.js

@@ -1,4 +1,4 @@
-define(['./baseSlice', '../lang/isFunction'], function(baseSlice, isFunction) {
+define(['./baseSlice'], function(baseSlice) {
 
   /** Used as a safe reference for `undefined` in pre-ES5 environments. */
   var undefined;
@@ -17,7 +17,7 @@ define(['./baseSlice', '../lang/isFunction'], function(baseSlice, isFunction) {
    * @returns {number} Returns the timer id.
    */
   function baseDelay(func, wait, args, fromIndex) {
-    if (!isFunction(func)) {
+    if (typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     return setTimeout(function() { func.apply(undefined, baseSlice(args, fromIndex)); }, wait);

internal/baseFill.js

@@ -0,0 +1,34 @@
+define([], function() {
+
+  /**
+   * The base implementation of `_.fill` without an iteratee call guard.
+   *
+   * @private
+   * @param {Array} array The array to fill.
+   * @param {*} value The value to fill `array` with.
+   * @param {number} [start=0] The start position.
+   * @param {number} [end=array.length] The end position.
+   * @returns {Array} Returns `array`.
+   */
+  function baseFill(array, value, start, end) {
+    var length = array.length;
+
+    start = start == null ? 0 : (+start || 0);
+    if (start < 0) {
+      start = -start > length ? 0 : (length + start);
+    }
+    end = (typeof end == 'undefined' || end > length) ? length : (+end || 0);
+    if (end < 0) {
+      end += length;
+    }
+    length = start > end ? 0 : end >>> 0;
+    start >>>= 0;
+
+    while (start < length) {
+      array[start++] = value;
+    }
+    return array;
+  }
+
+  return baseFill;
+});

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/baseIsMatch.js

@@ -14,7 +14,7 @@ define(['./baseIsEqual'], function(baseIsEqual) {
    * shorthands or `this` binding.
    *
    * @private
-   * @param {Object} source The object to inspect.
+   * @param {Object} object The object to inspect.
    * @param {Array} props The source property names to match.
    * @param {Array} values The source values to match.
    * @param {Array} strictCompareFlags Strict comparison flags for source values.

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/baseMatches.js

@@ -7,8 +7,7 @@ define(['./baseIsMatch', './isStrictComparable', '../object/keys'], function(bas
   var hasOwnProperty = objectProto.hasOwnProperty;
 
   /**
-   * The base implementation of `_.matches` which supports specifying whether
-   * `source` should be cloned.
+   * The base implementation of `_.matches` which does not clone `source`.
    *
    * @private
    * @param {Object} source The object of property values to match.
@@ -24,7 +23,7 @@ define(['./baseIsMatch', './isStrictComparable', '../object/keys'], function(bas
 
       if (isStrictComparable(value)) {
         return function(object) {
-          return object != null && value === object[key] && hasOwnProperty.call(object, key);
+          return object != null && object[key] === value && hasOwnProperty.call(object, key);
         };
       }
     }

internal/baseMatchesProperty.js

@@ -0,0 +1,24 @@
+define(['./baseIsEqual', './isStrictComparable'], function(baseIsEqual, isStrictComparable) {
+
+  /**
+   * The base implementation of `_.matchesProperty` which does not coerce `key`
+   * to a string.
+   *
+   * @private
+   * @param {string} key The key of the property to get.
+   * @param {*} value The value to compare.
+   * @returns {Function} Returns the new function.
+   */
+  function baseMatchesProperty(key, value) {
+    if (isStrictComparable(value)) {
+      return function(object) {
+        return object != null && object[key] === value;
+      };
+    }
+    return function(object) {
+      return object != null && baseIsEqual(value, object[key], null, true);
+    };
+  }
+
+  return baseMatchesProperty;
+});

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 = []);

internal/baseReduce.js

@@ -18,7 +18,7 @@ define([], function() {
     eachFunc(collection, function(value, index, collection) {
       accumulator = initFromCollection
         ? (initFromCollection = false, value)
-        : iteratee(accumulator, value, index, collection)
+        : iteratee(accumulator, value, index, collection);
     });
     return accumulator;
   }

internal/createAggregator.js

@@ -3,8 +3,7 @@ define(['./baseCallback', './baseEach', '../lang/isArray'], function(baseCallbac
   /**
    * Creates a function that aggregates a collection, creating an accumulator
    * object composed from the results of running each element in the collection
-   * through an iteratee. The `setter` sets the keys and values of the accumulator
-   * object. If `initializer` is provided initializes the accumulator object.
+   * through an iteratee.
    *
    * @private
    * @param {Function} setter The function to set keys and values of the accumulator object.

internal/createWrapper.js

@@ -1,4 +1,7 @@
-define(['./baseSetData', './createBindWrapper', './createHybridWrapper', './createPartialWrapper', './getData', '../lang/isFunction', './mergeData', './setData'], function(baseSetData, createBindWrapper, createHybridWrapper, createPartialWrapper, getData, isFunction, mergeData, setData) {
+define(['./baseSetData', './createBindWrapper', './createHybridWrapper', './createPartialWrapper', './getData', './mergeData', './setData'], function(baseSetData, createBindWrapper, createHybridWrapper, createPartialWrapper, getData, mergeData, setData) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1,
@@ -39,7 +42,7 @@ define(['./baseSetData', './createBindWrapper', './createHybridWrapper', './crea
    */
   function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
     var isBindKey = bitmask & BIND_KEY_FLAG;
-    if (!isBindKey && !isFunction(func)) {
+    if (!isBindKey && typeof func != 'function') {
       throw new TypeError(FUNC_ERROR_TEXT);
     }
     var length = partials ? partials.length : 0;
@@ -69,9 +72,9 @@ define(['./baseSetData', './createBindWrapper', './createHybridWrapper', './crea
     if (bitmask == BIND_FLAG) {
       var result = createBindWrapper(newData[0], newData[2]);
     } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !newData[4].length) {
-      result = createPartialWrapper.apply(null, newData);
+      result = createPartialWrapper.apply(undefined, newData);
     } else {
-      result = createHybridWrapper.apply(null, newData);
+      result = createHybridWrapper.apply(undefined, newData);
     }
     var setter = data ? baseSetData : setData;
     return setter(result, newData);

internal/isIterateeCall.js

@@ -20,7 +20,8 @@ define(['./isIndex', './isLength', '../lang/isObject'], function(isIndex, isLeng
     } else {
       prereq = type == 'string' && index in object;
     }
-    return prereq && object[index] === value;
+    var other = object[index];
+    return prereq && (value === value ? value === other : other !== other);
   }
 
   return isIterateeCall;

internal/lazyClone.js

@@ -9,18 +9,18 @@ define(['./LazyWrapper', './arrayCopy'], function(LazyWrapper, arrayCopy) {
    * @returns {Object} Returns the cloned `LazyWrapper` object.
    */
   function lazyClone() {
-    var actions = this.actions,
-        iteratees = this.iteratees,
-        views = this.views,
-        result = new LazyWrapper(this.wrapped);
+    var actions = this.__actions__,
+        iteratees = this.__iteratees__,
+        views = this.__views__,
+        result = new LazyWrapper(this.__wrapped__);
 
-    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;
-    result.views = views ? arrayCopy(views) : null;
+    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__;
+    result.__views__ = views ? arrayCopy(views) : null;
     return result;
   }
 

internal/lazyReverse.js

@@ -9,13 +9,13 @@ define(['./LazyWrapper'], function(LazyWrapper) {
    * @returns {Object} Returns the new reversed `LazyWrapper` object.
    */
   function lazyReverse() {
-    if (this.filtered) {
+    if (this.__filtered__) {
       var result = new LazyWrapper(this);
-      result.dir = -1;
-      result.filtered = true;
+      result.__dir__ = -1;
+      result.__filtered__ = true;
     } else {
       result = this.clone();
-      result.dir *= -1;
+      result.__dir__ *= -1;
     }
     return result;
   }