From ff0f05a1c1bab53352d9554ec9ac8086d3b7aa67 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 13 Jul 2013 10:35:05 -0700
Subject: [PATCH] Ensure more Arrays methods accept `arguments` objects and
 allow falsey arguments.

Former-commit-id: 06dfbb25236c6daf3efc6b0c1d06d00cf17180b8
---
 build.js                      | 50 +++++++++++---------
 dist/lodash.compat.js         | 43 +++++++++---------
 dist/lodash.compat.min.js     | 86 +++++++++++++++++------------------
 dist/lodash.js                | 43 +++++++++---------
 dist/lodash.min.js            | 78 +++++++++++++++----------------
 dist/lodash.underscore.js     | 37 ++++++++-------
 dist/lodash.underscore.min.js | 60 ++++++++++++------------
 lodash.js                     | 43 +++++++++---------
 8 files changed, 222 insertions(+), 218 deletions(-)

diff --git a/build.js b/build.js
index 2a4922f7e..0b6661179 100644
--- a/build.js
+++ b/build.js
@@ -87,9 +87,9 @@
     // public functions
     'after': [],
     'assign': ['createCallback', 'createIterator'],
-    'at': ['isString'],
+    'at': ['basicFlatten', 'isString'],
     'bind': ['createBound'],
-    'bindAll': ['bind', 'functions'],
+    'bindAll': ['basicFlatten', 'bind', 'functions'],
     'bindKey': ['createBound'],
     'clone': ['assign', 'createCallback', 'forEach', 'forOwn', 'getArray', 'isArray', 'isObject', 'isNode', 'releaseArray', 'slice'],
     'cloneDeep': ['clone'],
@@ -102,7 +102,7 @@
     'defaults': ['createCallback', 'createIterator'],
     'defer': ['bind'],
     'delay': [],
-    'difference': ['cacheIndexOf', 'createCache', 'getIndexOf', 'releaseObject'],
+    'difference': ['basicFlatten', 'cacheIndexOf', 'createCache', 'getIndexOf', 'releaseObject'],
     'escape': ['escapeHtmlChar', 'keys'],
     'every': ['basicEach', 'createCallback', 'isArray'],
     'filter': ['basicEach', 'createCallback', 'isArray'],
@@ -150,13 +150,13 @@
     'min': ['basicEach', 'charAtCallback', 'createCallback', 'isArray', 'isString'],
     'mixin': ['forEach', 'functions'],
     'noConflict': [],
-    'omit': ['createCallback', 'forIn', 'getIndexOf'],
+    'omit': ['basicFlatten', 'createCallback', 'forIn', 'getIndexOf'],
     'once': [],
     'pairs': ['keys'],
     'parseInt': ['isString'],
     'partial': ['createBound'],
     'partialRight': ['createBound'],
-    'pick': ['createCallback', 'forIn', 'isObject'],
+    'pick': ['basicFlatten', 'createCallback', 'forIn', 'isObject'],
     'pluck': ['map'],
     'random': [],
     'range': [],
@@ -178,7 +178,7 @@
     'toArray': ['isString', 'slice', 'values'],
     'transform': ['createCallback', 'createObject', 'forOwn', 'isArray'],
     'unescape': ['keys', 'unescapeHtmlChar'],
-    'union': ['basicFlatten', 'basicUniq'],
+    'union': ['basicFlatten', 'basicUniq', 'compact'],
     'uniq': ['basicUniq', 'overloadWrapper'],
     'uniqueId': [],
     'value': ['basicEach', 'forOwn', 'isArray', 'lodash', 'mixin', 'wrapperValueOf', 'lodashWrapper'],
@@ -2664,7 +2664,7 @@
           if (_.contains(deps, 'lodash') || _.contains(deps, 'lodashWrapper')) {
             funcDependencyMap[funcName] = _.without(deps, 'lodash', 'lodashWrapper');
           }
-        })
+        });
       }
       if (isUnderscore) {
         if (!isLodash('clone') && !isLodash('cloneDeep')) {
@@ -2707,7 +2707,11 @@
           if (!isLodash(funcName)) {
             var basicFuncName = 'basic' + capitalize(funcName);
 
-            (funcDependencyMap.union = _.without(funcDependencyMap.union, basicFuncName)).push(funcName);
+            _.forOwn(funcDependencyMap, function(deps, otherName) {
+              if (_.contains(deps, basicFuncName)) {
+                (funcDependencyMap[otherName] = _.without(deps, basicFuncName)).push(funcName);
+              }
+            });
 
             funcDependencyMap[funcName] = _.without(
               funcDependencyMap[funcName].concat(funcDependencyMap[basicFuncName], funcDependencyMap.overloadWrapper),
@@ -3149,7 +3153,7 @@
             '  var index = -1,',
             '      indexOf = getIndexOf(),',
             '      length = array.length,',
-            '      flattened = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),',
+            '      flattened = flatten(nativeSlice.call(arguments, 1)),',
             '      result = [];',
             '',
             '  while (++index < length) {',
@@ -3391,7 +3395,7 @@
           source = replaceFunction(source, 'omit', [
             'function omit(object) {',
             '  var indexOf = getIndexOf(),',
-            '      props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),',
+            '      props = flatten(nativeSlice.call(arguments, 1)),',
             '      result = {};',
             '',
             '  forIn(object, function(value, key) {',
@@ -3408,7 +3412,7 @@
           source = replaceFunction(source, 'pick', [
             'function pick(object) {',
             '  var index = -1,',
-            '      props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),',
+            '      props = flatten(nativeSlice.call(arguments, 1)),',
             '      length = props.length,',
             '      result = {};',
             '',
@@ -3652,16 +3656,6 @@
           });
         }
 
-        // replace `basicFlatten` and `basicUniq` with `flatten` and `uniq` in `_.union`
-        _.each(['flatten', 'uniq'], function(funcName) {
-          if (!isLodash(funcName)) {
-            source = source.replace(matchFunction(source, 'union'), function(match) {
-              var basicFuncName = 'basic' + capitalize(funcName);
-              return match.replace(RegExp('\\b' + basicFuncName + '\\b', 'g'), funcName);
-            });
-          }
-        });
-
         // replace `slice` with `nativeSlice.call`
         _.each(['clone', 'first', 'initial', 'last', 'rest', 'toArray'], function(funcName) {
           if (funcName == 'clone'
@@ -3674,6 +3668,20 @@
           }
         });
 
+        // replace `basicFlatten` with `flatten` and `basicUniq` with `uniq`
+        _.each(['flatten', 'uniq'], function(funcName) {
+          if (!isLodash(funcName)) {
+            var basicFuncName = 'basic' + capitalize(funcName);
+            _.forOwn(funcDependencyMap, function(deps, otherName) {
+              if (_.contains(deps, funcName)) {
+                source = source.replace(matchFunction(source, otherName), function(match) {
+                  return match.replace(RegExp('\\b' + basicFuncName + '\\b', 'g'), funcName);
+                });
+              }
+            });
+          }
+        });
+
         // remove conditional `charCodeCallback` use from `_.max` and `_.min`
         _.each(['max', 'min'], function(funcName) {
           if (!isLodash(funcName)) {
diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index d3016c079..5bf4849d7 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -488,7 +488,6 @@
     /** Native method shortcuts */
     var ceil = Math.ceil,
         clearTimeout = context.clearTimeout,
-        concat = arrayRef.concat,
         floor = Math.floor,
         fnToString = Function.prototype.toString,
         getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
@@ -2498,7 +2497,7 @@
       if (isFunc) {
         callback = lodash.createCallback(callback, thisArg);
       } else {
-        var props = concat.apply(arrayRef, nativeSlice.call(arguments, 1));
+        var props = basicFlatten(nativeSlice.call(arguments, 1));
       }
       forIn(object, function(value, key, object) {
         if (isFunc
@@ -2549,8 +2548,9 @@
      * @memberOf _
      * @category Objects
      * @param {Object} object The source object.
-     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
-     *  per iteration or properties to pick, either as individual arguments or arrays.
+     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function
+     *  called per iteration or property names to pick, specified as individual
+     *  property names or arrays of property names.
      * @param {Mixed} [thisArg] The `this` binding of `callback`.
      * @returns {Object} Returns an object composed of the picked properties.
      * @example
@@ -2567,7 +2567,7 @@
       var result = {};
       if (typeof callback != 'function') {
         var index = -1,
-            props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+            props = basicFlatten(nativeSlice.call(arguments, 1)),
             length = isObject(object) ? props.length : 0;
 
         while (++index < length) {
@@ -2674,8 +2674,8 @@
      * @memberOf _
      * @category Collections
      * @param {Array|Object|String} collection The collection to iterate over.
-     * @param {Array|Number|String} [index1, index2, ...] The indexes of
-     *  `collection` to retrieve, either as individual arguments or arrays.
+     * @param {Array|Number|String} [index1, index2, ...] The indexes of `collection`
+     *   to retrieve, specified as individual indexes or arrays of indexes.
      * @returns {Array} Returns a new array of elements corresponding to the
      *  provided indexes.
      * @example
@@ -2688,7 +2688,7 @@
      */
     function at(collection) {
       var index = -1,
-          props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          props = basicFlatten(nativeSlice.call(arguments, 1)),
           length = props.length,
           result = Array(length);
 
@@ -3714,16 +3714,17 @@
     }
 
     /**
-     * Creates an array of `array` elements not present in the other arrays
-     * using strict equality for comparisons, i.e. `===`.
+     * Creates an arrat with all occurrences of the passed values removed using
+     * using strict equality for comparisons, i.e. `===`. Values to exclude may
+     * be specified as individual arguments or as arrays.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to process.
-     * @param {Array} [array1, array2, ...] Arrays to check.
-     * @returns {Array} Returns a new array of `array` elements not present in the
-     *  other arrays.
+     * @param {Array} [array1, array2, ...] The values to exclude, specified as
+     *  individual values or arrays of values.
+     * @returns {Array} Returns a new filtered array.
      * @example
      *
      * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
@@ -3733,7 +3734,7 @@
       var index = -1,
           indexOf = getIndexOf(),
           length = array ? array.length : 0,
-          seen = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          seen = basicFlatten(nativeSlice.call(arguments, 1)),
           result = [];
 
       var isLarge = length >= largeArraySize && indexOf === basicIndexOf;
@@ -4398,10 +4399,7 @@
      * // => [1, 2, 3, 101, 10]
      */
     function union(array) {
-      if (!array) {
-        arguments[0] = arrayRef;
-      }
-      return basicUniq(basicFlatten(arguments, true));
+      return basicUniq(basicFlatten(compact(arguments), true));
     }
 
     /**
@@ -4450,14 +4448,14 @@
     var uniq = overloadWrapper(basicUniq);
 
     /**
-     * Creates an array with all occurrences of the passed values removed using
+     * Creates an array excluding all occurrences of the passed values using
      * strict equality for comparisons, i.e. `===`.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to filter.
-     * @param {Mixed} [value1, value2, ...] Values to remove.
+     * @param {Mixed} [value1, value2, ...] Values to exclude.
      * @returns {Array} Returns a new filtered array.
      * @example
      *
@@ -4599,7 +4597,8 @@
      * @memberOf _
      * @category Functions
      * @param {Object} object The object to bind and assign the bound methods to.
-     * @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
+     * @param {String} [methodName1, methodName2, ...] The object method names to
+     *  bind, specified as individual values or arrays of values.
      * @returns {Object} Returns `object`.
      * @example
      *
@@ -4613,7 +4612,7 @@
      * // => alerts 'clicked docs', when the button is clicked
      */
     function bindAll(object) {
-      var funcs = arguments.length > 1 ? concat.apply(arrayRef, nativeSlice.call(arguments, 1)) : functions(object),
+      var funcs = arguments.length > 1 ? basicFlatten(nativeSlice.call(arguments, 1)) : functions(object),
           index = -1,
           length = funcs.length;
 
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index a30e64928..adc01aed1 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -3,48 +3,48 @@
  * Lo-Dash 1.3.1 (Custom Build) lodash.com/license | Underscore.js 1.5.1 underscorejs.org/LICENSE
  * Build: `lodash -o ./dist/lodash.compat.js`
  */
-;!function(n){function t(n,t,r){r=(r||0)-1;for(var e=n.length;++r<e;)if(n[r]===t)return r;return-1}function r(n,r){var e=typeof r;if(n=n.k,"boolean"==e||r==d)return n[r];"number"!=e&&"string"!=e&&(e="object");var u="number"==e?r:O+r;return n=n[e]||(n[e]={}),"object"==e?n[u]&&-1<t(n[u],r)?0:-1:n[u]?0:-1}function e(n){var t=this.k,r=typeof n;if("boolean"==r||n==d)t[n]=m;else{"number"!=r&&"string"!=r&&(r="object");var e="number"==r?n:O+n,t=t[r]||(t[r]={});"object"==r?(t[e]||(t[e]=[])).push(n):t[e]=m}}function u(n){return n.charCodeAt(0)
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+Y[M]=b,Y[L]=Y[G]=Y[H]=Y[J]=Y[U]=Y[V]=Y[Q]=Y[X]=y;var Z={"boolean":b,"function":y,object:y,number:b,string:b,undefined:b},nt={"\\":"\\","'":"'","\n":"n","\r":"r","\t":"t","\u2028":"u2028","\u2029":"u2029"},tt=Z[typeof exports]&&exports,rt=Z[typeof module]&&module&&module.exports==tt&&module,et=Z[typeof global]&&global;!et||et.global!==et&&et.window!==et||(n=et);var ut=h();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(n._=ut, define(function(){return ut})):tt&&!tt.nodeType?rt?(rt.exports=ut)._=ut:tt._=ut:n._=ut
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diff --git a/dist/lodash.js b/dist/lodash.js
index a21b6bf56..473dac71a 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -456,7 +456,6 @@
     /** Native method shortcuts */
     var ceil = Math.ceil,
         clearTimeout = context.clearTimeout,
-        concat = arrayRef.concat,
         floor = Math.floor,
         fnToString = Function.prototype.toString,
         getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
@@ -2152,7 +2151,7 @@
       if (isFunc) {
         callback = lodash.createCallback(callback, thisArg);
       } else {
-        var props = concat.apply(arrayRef, nativeSlice.call(arguments, 1));
+        var props = basicFlatten(nativeSlice.call(arguments, 1));
       }
       forIn(object, function(value, key, object) {
         if (isFunc
@@ -2203,8 +2202,9 @@
      * @memberOf _
      * @category Objects
      * @param {Object} object The source object.
-     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
-     *  per iteration or properties to pick, either as individual arguments or arrays.
+     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function
+     *  called per iteration or property names to pick, specified as individual
+     *  property names or arrays of property names.
      * @param {Mixed} [thisArg] The `this` binding of `callback`.
      * @returns {Object} Returns an object composed of the picked properties.
      * @example
@@ -2221,7 +2221,7 @@
       var result = {};
       if (typeof callback != 'function') {
         var index = -1,
-            props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+            props = basicFlatten(nativeSlice.call(arguments, 1)),
             length = isObject(object) ? props.length : 0;
 
         while (++index < length) {
@@ -2328,8 +2328,8 @@
      * @memberOf _
      * @category Collections
      * @param {Array|Object|String} collection The collection to iterate over.
-     * @param {Array|Number|String} [index1, index2, ...] The indexes of
-     *  `collection` to retrieve, either as individual arguments or arrays.
+     * @param {Array|Number|String} [index1, index2, ...] The indexes of `collection`
+     *   to retrieve, specified as individual indexes or arrays of indexes.
      * @returns {Array} Returns a new array of elements corresponding to the
      *  provided indexes.
      * @example
@@ -2342,7 +2342,7 @@
      */
     function at(collection) {
       var index = -1,
-          props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          props = basicFlatten(nativeSlice.call(arguments, 1)),
           length = props.length,
           result = Array(length);
 
@@ -3375,16 +3375,17 @@
     }
 
     /**
-     * Creates an array of `array` elements not present in the other arrays
-     * using strict equality for comparisons, i.e. `===`.
+     * Creates an arrat with all occurrences of the passed values removed using
+     * using strict equality for comparisons, i.e. `===`. Values to exclude may
+     * be specified as individual arguments or as arrays.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to process.
-     * @param {Array} [array1, array2, ...] Arrays to check.
-     * @returns {Array} Returns a new array of `array` elements not present in the
-     *  other arrays.
+     * @param {Array} [array1, array2, ...] The values to exclude, specified as
+     *  individual values or arrays of values.
+     * @returns {Array} Returns a new filtered array.
      * @example
      *
      * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
@@ -3394,7 +3395,7 @@
       var index = -1,
           indexOf = getIndexOf(),
           length = array ? array.length : 0,
-          seen = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          seen = basicFlatten(nativeSlice.call(arguments, 1)),
           result = [];
 
       var isLarge = length >= largeArraySize && indexOf === basicIndexOf;
@@ -4059,10 +4060,7 @@
      * // => [1, 2, 3, 101, 10]
      */
     function union(array) {
-      if (!array) {
-        arguments[0] = arrayRef;
-      }
-      return basicUniq(basicFlatten(arguments, true));
+      return basicUniq(basicFlatten(compact(arguments), true));
     }
 
     /**
@@ -4111,14 +4109,14 @@
     var uniq = overloadWrapper(basicUniq);
 
     /**
-     * Creates an array with all occurrences of the passed values removed using
+     * Creates an array excluding all occurrences of the passed values using
      * strict equality for comparisons, i.e. `===`.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to filter.
-     * @param {Mixed} [value1, value2, ...] Values to remove.
+     * @param {Mixed} [value1, value2, ...] Values to exclude.
      * @returns {Array} Returns a new filtered array.
      * @example
      *
@@ -4260,7 +4258,8 @@
      * @memberOf _
      * @category Functions
      * @param {Object} object The object to bind and assign the bound methods to.
-     * @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
+     * @param {String} [methodName1, methodName2, ...] The object method names to
+     *  bind, specified as individual values or arrays of values.
      * @returns {Object} Returns `object`.
      * @example
      *
@@ -4274,7 +4273,7 @@
      * // => alerts 'clicked docs', when the button is clicked
      */
     function bindAll(object) {
-      var funcs = arguments.length > 1 ? concat.apply(arrayRef, nativeSlice.call(arguments, 1)) : functions(object),
+      var funcs = arguments.length > 1 ? basicFlatten(nativeSlice.call(arguments, 1)) : functions(object),
           index = -1,
           length = funcs.length;
 
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 8037e3647..d41a93d5a 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -3,45 +3,45 @@
  * Lo-Dash 1.3.1 (Custom Build) lodash.com/license | Underscore.js 1.5.1 underscorejs.org/LICENSE
  * Build: `lodash modern -o ./dist/lodash.js`
  */
-;!function(n){function t(n,t,e){e=(e||0)-1;for(var r=n.length;++e<r;)if(n[e]===t)return e;return-1}function e(n,e){var r=typeof e;if(n=n.k,"boolean"==r||e==h)return n[e];"number"!=r&&"string"!=r&&(r="object");var u="number"==r?e:w+e;return n=n[r]||(n[r]={}),"object"==r?n[u]&&-1<t(n[u],e)?0:-1:n[u]?0:-1}function r(n){var t=this.k,e=typeof n;if("boolean"==e||n==h)t[n]=y;else{"number"!=e&&"string"!=e&&(e="object");var r="number"==e?n:w+n,t=t[e]||(t[e]={});"object"==e?(t[r]||(t[r]=[])).push(n):t[r]=y}}function u(n){return n.charCodeAt(0)
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diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index fbd4d38c4..a319e75b3 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -176,7 +176,6 @@
 
   /** Native method shortcuts */
   var ceil = Math.ceil,
-      concat = arrayRef.concat,
       floor = Math.floor,
       hasOwnProperty = objectProto.hasOwnProperty,
       push = arrayRef.push,
@@ -1318,7 +1317,7 @@
    */
   function omit(object) {
     var indexOf = getIndexOf(),
-        props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+        props = flatten(nativeSlice.call(arguments, 1)),
         result = {};
 
     forIn(object, function(value, key) {
@@ -1367,8 +1366,9 @@
    * @memberOf _
    * @category Objects
    * @param {Object} object The source object.
-   * @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
-   *  per iteration or properties to pick, either as individual arguments or arrays.
+   * @param {Array|Function|String} callback|[prop1, prop2, ...] The function
+   *  called per iteration or property names to pick, specified as individual
+   *  property names or arrays of property names.
    * @param {Mixed} [thisArg] The `this` binding of `callback`.
    * @returns {Object} Returns an object composed of the picked properties.
    * @example
@@ -1383,7 +1383,7 @@
    */
   function pick(object) {
     var index = -1,
-        props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+        props = flatten(nativeSlice.call(arguments, 1)),
         length = props.length,
         result = {};
 
@@ -2466,16 +2466,17 @@
   }
 
   /**
-   * Creates an array of `array` elements not present in the other arrays
-   * using strict equality for comparisons, i.e. `===`.
+   * Creates an arrat with all occurrences of the passed values removed using
+   * using strict equality for comparisons, i.e. `===`. Values to exclude may
+   * be specified as individual arguments or as arrays.
    *
    * @static
    * @memberOf _
    * @category Arrays
    * @param {Array} array The array to process.
-   * @param {Array} [array1, array2, ...] Arrays to check.
-   * @returns {Array} Returns a new array of `array` elements not present in the
-   *  other arrays.
+   * @param {Array} [array1, array2, ...] The values to exclude, specified as
+   *  individual values or arrays of values.
+   * @returns {Array} Returns a new filtered array.
    * @example
    *
    * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
@@ -2485,7 +2486,7 @@
     var index = -1,
         indexOf = getIndexOf(),
         length = array.length,
-        flattened = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+        flattened = flatten(nativeSlice.call(arguments, 1)),
         result = [];
 
     while (++index < length) {
@@ -3096,10 +3097,7 @@
    * // => [1, 2, 3, 101, 10]
    */
   function union(array) {
-    if (!array) {
-      arguments[0] = arrayRef;
-    }
-    return uniq(flatten(arguments, true));
+    return uniq(flatten(compact(arguments), true));
   }
 
   /**
@@ -3179,14 +3177,14 @@
   }
 
   /**
-   * Creates an array with all occurrences of the passed values removed using
+   * Creates an array excluding all occurrences of the passed values using
    * strict equality for comparisons, i.e. `===`.
    *
    * @static
    * @memberOf _
    * @category Arrays
    * @param {Array} array The array to filter.
-   * @param {Mixed} [value1, value2, ...] Values to remove.
+   * @param {Mixed} [value1, value2, ...] Values to exclude.
    * @returns {Array} Returns a new filtered array.
    * @example
    *
@@ -3327,7 +3325,8 @@
    * @memberOf _
    * @category Functions
    * @param {Object} object The object to bind and assign the bound methods to.
-   * @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
+   * @param {String} [methodName1, methodName2, ...] The object method names to
+   *  bind, specified as individual values or arrays of values.
    * @returns {Object} Returns `object`.
    * @example
    *
@@ -3341,7 +3340,7 @@
    * // => alerts 'clicked docs', when the button is clicked
    */
   function bindAll(object) {
-    var funcs = arguments.length > 1 ? concat.apply(arrayRef, nativeSlice.call(arguments, 1)) : functions(object),
+    var funcs = arguments.length > 1 ? flatten(nativeSlice.call(arguments, 1)) : functions(object),
         index = -1,
         length = funcs.length;
 
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 2cd1ceb6c..e8421608a 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -3,34 +3,34 @@
  * Lo-Dash 1.3.1 (Custom Build) lodash.com/license | Underscore.js 1.5.1 underscorejs.org/LICENSE
  * Build: `lodash underscore exports="amd,commonjs,global,node" -o ./dist/lodash.underscore.js`
  */
-;!function(n){function t(n,t,r){r=(r||0)-1;for(var e=n.length;++r<e;)if(n[r]===t)return r;return-1}function r(n,t){var r=n.m,e=t.m;if(n=n.l,t=t.l,n!==t){if(n>t||typeof n=="undefined")return 1;if(n<t||typeof t=="undefined")return-1}return r<e?-1:1}function e(n){return"\\"+lt[n]}function u(){}function i(n){return n instanceof i?n:new o(n)}function o(n){this.__wrapped__=n}function a(n,t,r,e){function u(){var e=arguments,c=o?this:t;return i||(n=t[a]),r.length&&(e=e.length?(e=Rt.call(e),l?e.concat(r):r.concat(e)):r),this instanceof u?(c=f(n.prototype),e=n.apply(c,e),b(e)?e:c):n.apply(c,e)
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+;!function(n){function t(n,t,r){r=(r||0)-1;for(var e=n.length;++r<e;)if(n[r]===t)return r;return-1}function r(n,t){var r=n.m,e=t.m;if(n=n.l,t=t.l,n!==t){if(n>t||typeof n=="undefined")return 1;if(n<t||typeof t=="undefined")return-1}return r<e?-1:1}function e(n){return"\\"+ct[n]}function u(){}function i(n){return n instanceof i?n:new o(n)}function o(n){this.__wrapped__=n}function a(n,t,r,e){function u(){var e=arguments,c=o?this:t;return i||(n=t[a]),r.length&&(e=e.length?(e=Rt.call(e),l?e.concat(r):r.concat(e)):r),this instanceof u?(c=f(n.prototype),e=n.apply(c,e),b(e)?e:c):n.apply(c,e)
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diff --git a/lodash.js b/lodash.js
index bd4dcfdfe..fdd897ce9 100644
--- a/lodash.js
+++ b/lodash.js
@@ -488,7 +488,6 @@
     /** Native method shortcuts */
     var ceil = Math.ceil,
         clearTimeout = context.clearTimeout,
-        concat = arrayRef.concat,
         floor = Math.floor,
         fnToString = Function.prototype.toString,
         getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
@@ -2517,7 +2516,7 @@
       if (isFunc) {
         callback = lodash.createCallback(callback, thisArg);
       } else {
-        var props = concat.apply(arrayRef, nativeSlice.call(arguments, 1));
+        var props = basicFlatten(nativeSlice.call(arguments, 1));
       }
       forIn(object, function(value, key, object) {
         if (isFunc
@@ -2568,8 +2567,9 @@
      * @memberOf _
      * @category Objects
      * @param {Object} object The source object.
-     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
-     *  per iteration or properties to pick, either as individual arguments or arrays.
+     * @param {Array|Function|String} callback|[prop1, prop2, ...] The function
+     *  called per iteration or property names to pick, specified as individual
+     *  property names or arrays of property names.
      * @param {Mixed} [thisArg] The `this` binding of `callback`.
      * @returns {Object} Returns an object composed of the picked properties.
      * @example
@@ -2586,7 +2586,7 @@
       var result = {};
       if (typeof callback != 'function') {
         var index = -1,
-            props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+            props = basicFlatten(nativeSlice.call(arguments, 1)),
             length = isObject(object) ? props.length : 0;
 
         while (++index < length) {
@@ -2693,8 +2693,8 @@
      * @memberOf _
      * @category Collections
      * @param {Array|Object|String} collection The collection to iterate over.
-     * @param {Array|Number|String} [index1, index2, ...] The indexes of
-     *  `collection` to retrieve, either as individual arguments or arrays.
+     * @param {Array|Number|String} [index1, index2, ...] The indexes of `collection`
+     *   to retrieve, specified as individual indexes or arrays of indexes.
      * @returns {Array} Returns a new array of elements corresponding to the
      *  provided indexes.
      * @example
@@ -2707,7 +2707,7 @@
      */
     function at(collection) {
       var index = -1,
-          props = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          props = basicFlatten(nativeSlice.call(arguments, 1)),
           length = props.length,
           result = Array(length);
 
@@ -3733,16 +3733,17 @@
     }
 
     /**
-     * Creates an array of `array` elements not present in the other arrays
-     * using strict equality for comparisons, i.e. `===`.
+     * Creates an arrat with all occurrences of the passed values removed using
+     * using strict equality for comparisons, i.e. `===`. Values to exclude may
+     * be specified as individual arguments or as arrays.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to process.
-     * @param {Array} [array1, array2, ...] Arrays to check.
-     * @returns {Array} Returns a new array of `array` elements not present in the
-     *  other arrays.
+     * @param {Array} [array1, array2, ...] The values to exclude, specified as
+     *  individual values or arrays of values.
+     * @returns {Array} Returns a new filtered array.
      * @example
      *
      * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
@@ -3752,7 +3753,7 @@
       var index = -1,
           indexOf = getIndexOf(),
           length = array ? array.length : 0,
-          seen = concat.apply(arrayRef, nativeSlice.call(arguments, 1)),
+          seen = basicFlatten(nativeSlice.call(arguments, 1)),
           result = [];
 
       var isLarge = length >= largeArraySize && indexOf === basicIndexOf;
@@ -4417,10 +4418,7 @@
      * // => [1, 2, 3, 101, 10]
      */
     function union(array) {
-      if (!array) {
-        arguments[0] = arrayRef;
-      }
-      return basicUniq(basicFlatten(arguments, true));
+      return basicUniq(basicFlatten(compact(arguments), true));
     }
 
     /**
@@ -4469,14 +4467,14 @@
     var uniq = overloadWrapper(basicUniq);
 
     /**
-     * Creates an array with all occurrences of the passed values removed using
+     * Creates an array excluding all occurrences of the passed values using
      * strict equality for comparisons, i.e. `===`.
      *
      * @static
      * @memberOf _
      * @category Arrays
      * @param {Array} array The array to filter.
-     * @param {Mixed} [value1, value2, ...] Values to remove.
+     * @param {Mixed} [value1, value2, ...] Values to exclude.
      * @returns {Array} Returns a new filtered array.
      * @example
      *
@@ -4618,7 +4616,8 @@
      * @memberOf _
      * @category Functions
      * @param {Object} object The object to bind and assign the bound methods to.
-     * @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
+     * @param {String} [methodName1, methodName2, ...] The object method names to
+     *  bind, specified as individual values or arrays of values.
      * @returns {Object} Returns `object`.
      * @example
      *
@@ -4632,7 +4631,7 @@
      * // => alerts 'clicked docs', when the button is clicked
      */
     function bindAll(object) {
-      var funcs = arguments.length > 1 ? concat.apply(arrayRef, nativeSlice.call(arguments, 1)) : functions(object),
+      var funcs = arguments.length > 1 ? basicFlatten(nativeSlice.call(arguments, 1)) : functions(object),
           index = -1,
           length = funcs.length;