Simplify function checks and cleanup documentation.

Former-commit-id: 460f34725e212ced27831b9aad1e9e7e2fc02cf1

README.md

@@ -1,12 +1,18 @@
-# Lo-Dash <sup>v0.2.0</sup>
+# Lo-Dash <sup>v0.3.0</sup>
 
-A drop-in replacement for Underscore.js, from the devs behind [jsPerf.com](http://jsperf.com), that delivers [performance improvements](http://jsperf.com/lodash-underscore#filterby=family), bug fixes, and additional features.
+A drop-in replacement for Underscore.js, from the devs behind [jsPerf.com](http://jsperf.com), that delivers [performance improvements](http://lodash.com/benchmarks), [bug fixes](https://github.com/bestiejs/lodash#closed-underscorejs-issues), and [additional features](https://github.com/bestiejs/lodash#features).
 
 Lo-Dash’s performance is gained by avoiding slower native methods, instead opting for simplified non-ES5 compliant methods optimized for common usage, and by leveraging function compilation to reduce the number of overall function calls.
 
+## Download
+
+ * [Development source](https://raw.github.com/bestiejs/lodash/v0.3.0/lodash.js)
+ * [Production source](https://raw.github.com/bestiejs/lodash/v0.3.0/lodash.min.js)
+ * For optimal performance, [create a custom build](https://github.com/bestiejs/lodash#custom-builds) with only the features you need
+
 ## Dive in
 
-We’ve got [API docs](http://lodash.com/docs) and [unit tests](http://lodash.com/tests).
+We’ve got [API docs](http://lodash.com/docs), [benchmarks](http://lodash.com/benchmarks), and [unit tests](http://lodash.com/tests).
 
 For a list of upcoming features, check out our [roadmap](https://github.com/bestiejs/lodash/wiki/Roadmap).
 
@@ -19,35 +25,55 @@ For more information check out these screencasts over Lo-Dash:
 
 ## Features
 
- * AMD loader support
+ * AMD loader support (RequireJS, curl.js, etc.)
- * [_.bind](http://lodash.com/docs#_bindfunc--arg1-arg2-) supports *"lazy"* binding
+ * [_.bind](http://lodash.com/docs#bind) supports *"lazy"* binding
- * [_.debounce](http://lodash.com/docs#_debouncefunc-wait-immediate)’ed functions match [_.throttle](http://lodash.com/docs#_throttlefunc-wait)’ed functions’ return value behavior
+ * [_.debounce](http://lodash.com/docs#debounce)’ed functions match [_.throttle](http://lodash.com/docs#throttle)’ed functions’ return value behavior
- * [_.forEach](http://lodash.com/docs#_foreachcollection-callback--thisarg) is chainable
+ * [_.forEach](http://lodash.com/docs#forEach) is chainable
- * [_.groupBy](http://lodash.com/docs#_groupbycollection-callback--thisarg) accepts a third `thisArg` argument
+ * [_.forIn](http://lodash.com/docs#forIn) for iterating over an object’s own and inherited properties
- * [_.partial](http://lodash.com/docs#_partialfunc--arg1-arg2-) for more functional fun
+ * [_.forOwn](http://lodash.com/docs#forOwn) for iterating over an object’s own properties
- * [_.size](http://lodash.com/docs#_sizecollection) returns the `length` of string values
+ * [_.groupBy](http://lodash.com/docs#groupBy), [_.sortedIndex](http://lodash.com/docs#sortedIndex), and [_.uniq](http://lodash.com/docs#uniq) accept a `thisArg` argument
+ * [_.indexOf](http://lodash.com/docs#indexOf) and [_.lastIndexOf](http://lodash.com/docs#lastIndexOf) accept a `fromIndex` argument
+ * [_.partial](http://lodash.com/docs#partial) for more functional fun
+ * [_.size](http://lodash.com/docs#size) supports returning the `length` of string values
+ * [_.template](http://lodash.com/docs#template) utilizes [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl) for easier debugging
 
 ## Support
 
-Lo-Dash has been tested in at least Chrome 5-19, Firefox 1.5-12, IE 6-9, Opera 9.25-11.64, Safari 3.0.4-5.1.3, Node.js 0.4.8-0.6.18, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC3.
+Lo-Dash has been tested in at least Chrome 5-19, Firefox 1.5-13, IE 6-9, Opera 9.25-11.64, Safari 3.0.4-5.1.3, Node.js 0.4.8-0.6.18, Narwhal 0.3.2, RingoJS 0.8, and Rhino 1.7RC3.
 
 ## Custom builds
 
 Custom builds make it easy to create lightweight versions of Lo-Dash containing only the methods you need.
 We handle all the method dependency and alias mapping for you.
 
-Custom builds may be created in two ways:
+Mobile builds, with IE bug fixes and method compilation removed, may be created by using the `mobile` argument.
 
- 1. Use the`include` argument to pass the names of the methods to include in the build.
 ~~~ bash
-node build include=each,filter,map,noConflict
+node build mobile
-node build include="each, filter, map, noConflict"
 ~~~
 
- 2. Use the `exclude` argument to pass the names of the methods to exclude from the build.
+Custom builds may be created in three ways:
+
+ 1. Use the `category` argument to pass the categories of methods to include in the build.<br>
+    Valid categories are *"arrays"*, *"chaining"*, *"collections"*, *"functions"*, *"objects"*, and *"utilities"*.
 ~~~ bash
-node build exclude=isNaN,isUndefined,union,zip
+node build category=collections,functions
-node build exclude="isNaN, isUndefined, union, zip"
+node build category="collections, functions"
+node build mobile category=collections,functions
+~~~
+
+ 2. Use the `include` argument to pass the names of the methods to include in the build.
+~~~ bash
+node build include=each,filter,map
+node build include="each, filter, map"
+node build mobile include=each,filter,map
+~~~
+
+ 3. Use the `exclude` argument to pass the names of the methods to exclude from the build.
+~~~ bash
+node build exclude=union,uniq,zip
+node build exclude="union, uniq, zip"
+node build mobile exclude=union,uniq,zip
 ~~~
 
 Custom builds are saved to `lodash.custom.js` and `lodash.custom.min.js`.
@@ -116,14 +142,20 @@ git submodule update --init
 
 ## Closed Underscore.js issues
 
- * Fix Firefox, IE, Opera, and Safari object iteration bugs [#376](https://github.com/documentcloud/underscore/issues/376)
+ * Allow iteration of objects with a `length` property [[#148](https://github.com/documentcloud/underscore/issues/148), [#154](https://github.com/documentcloud/underscore/issues/154), [#252](https://github.com/documentcloud/underscore/issues/252), [#448](https://github.com/documentcloud/underscore/issues/448), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L266-272)]
- * Handle arrays with `undefined` values correctly in IE < 9 [#601](https://github.com/documentcloud/underscore/issues/601)
+ * Ensure array-like objects with invalid `length` properties are treated like regular objects [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L237-243), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L533-542), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L661-664)]
- * Methods should work on pages with incorrectly shimmed native methods [#7](https://github.com/documentcloud/underscore/issues/7)
+ * Ensure `_(...)` returns passed wrapper instances [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L106-109)]
- * Register as AMD module, but still export to global [#431](https://github.com/documentcloud/underscore/pull/431)
+ * Ensure `_.groupBy` adds values to own, not inherited, properties [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L317-324)]
- * `_.forEach` should be chainable [#142](https://github.com/documentcloud/underscore/issues/142)
+ * Ensure `_.sortedIndex` supports arrays with high `length` values [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L586-595)]
- * `_isNaN(new Number(NaN))` should return `true`
+ * Ensure `_.throttle` works when called in tight loops [[#502](https://github.com/documentcloud/underscore/issues/502), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L629-639)]
- * `_.reduceRight` should pass correct callback arguments when iterating objects
+ * Fix Firefox, IE, Opera, and Safari object iteration bugs [[#376](https://github.com/documentcloud/underscore/issues/376), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L175-187), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L277-302), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L379-390), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L398-400), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L418-438), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L554-556)]
- * `_.size` should return the `length` of string values
+ * Handle arrays with `undefined` values correctly in IE < 9 [[#601](https://github.com/documentcloud/underscore/issues/601)]
+ * Methods should work on pages with incorrectly shimmed native methods [[#7](https://github.com/documentcloud/underscore/issues/7), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L88-94)]
+ * Register as AMD module, but still export to global [[#431](https://github.com/documentcloud/underscore/pull/431), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L72-86)]
+ * `_.forEach` should be chainable [[#142](https://github.com/documentcloud/underscore/issues/142), [test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L232-235)]
+ * `_isNaN(new Number(NaN))` should return `true` [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L408-410)]
+ * `_.reduceRight` should pass correct callback arguments when iterating objects [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L521-531)]
+ * `_.size` should return the `length` of string values [[test](https://github.com/bestiejs/lodash/blob/c07e1567a7a12cff2c5ee6cda81306c8bcf126f0/test/test.js#L550-552)]
 
 ## Optimized methods <sup>(50+)</sup>
 
@@ -146,7 +178,7 @@ git submodule update --init
  * `_.functions`, `_.methods`
  * `_.groupBy`
  * `_.indexOf`
- * `_.intersection`, `_.intersect`
+ * `_.intersection`
  * `_.invoke`
  * `_.isEmpty`
  * `_.isEqual`
@@ -171,6 +203,7 @@ git submodule update --init
  * `_.sortedIndex`
  * `_.template`
  * `_.throttle`
+ * `_.times`
  * `_.toArray`
  * `_.union`
  * `_.uniq`, `_.unique`
@@ -182,6 +215,34 @@ git submodule update --init
 
 ## Changelog
 
+### <sup>v0.3.0</sup>
+
+ * Added `category` build option
+ * Added `fromIndex` argument to `_.indexOf` and `_.lastIndexOf`
+ * Added `//@ sourceURL` support to `_.template`
+ * Added `thisArg` argument to `_.sortedIndex` and `_.uniq`
+ * Added `_.forIn` and `_.forOwn` methods
+ * Ensured array-like objects with invalid `length` properties are treated like regular objects
+ * Ensured `_.sortedIndex` supports arrays with high `length` values
+ * Fixed `prototype` property iteration bug in `_.keys` for Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
+ * Optimized `_.times` and `this` bindings in iterator methods
+
+### <sup>v0.2.2</sup>
+
+ * Added `mobile` build option
+ * Ensured `_.find` returns `undefined` for unmatched values
+ * Ensured `_.templateSettings.variable` is compatible with Underscore.js
+ * Optimized `_.escape`
+ * Reduced dependencies in `_.find`
+
+### <sup>v0.2.1</sup>
+
+ * Adjusted the Lo-Dash export order for r.js
+ * Ensured `_.groupBy` values are added to own, not inherited, properties
+ * Made `_.bind` follow ES5 spec to support a popular Backbone.js pattern
+ * Removed the alias `intersect`
+ * Simplified `_.bind`, `_.flatten`, `_.groupBy`, `_.max`, and `_.min`
+
 ### <sup>v0.2.0</sup>
 
  * Added custom build options
@@ -189,12 +250,14 @@ git submodule update --init
  * Added *"lazy bind"* support to `_.bind`
  * Added native method overwrite detection to avoid bad native shims
  * Added support for more AMD build optimizers and aliasing as the *"underscore"* module
- * Added `thisArg` to `_.groupBy`
+ * Added `thisArg` argument to `_.groupBy`
  * Added whitespace to compiled strings
- * Added `_.partial`
+ * Added `_.partial` method
  * Commented the `iterationFactory` options object
+ * Ensured `_(...)` returns passed wrapper instances
  * Ensured `_.max` and `_.min` support extremely large arrays
- * Fixed IE < 9 `[DontEnum]` bug and Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1’s prototype property iteration bug
+ * Ensured `_.throttle` works in tight loops
+ * Fixed IE < 9 `[DontEnum]` bug and Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1’s `prototype` property iteration bug
  * Inlined `_.isFunction` calls.
  * Made `_.debounce`’ed functions match `_.throttle`’ed functions’ return value behavior
  * Made `_.escape` no longer translate the *">"* character

build.js

@@ -10,8 +10,8 @@
   var lodash = require(path.join(__dirname, 'lodash')),
       minify = require(path.join(__dirname, 'build', 'minify'));
 
-  /** Flag used to specify a custom build */
+  /** Flag used to specify a mobile build */
-  var isCustom = false;
+  var isMobile = process.argv.indexOf('mobile') > -1;
 
   /** Shortcut used to convert array-like objects to arrays */
   var slice = [].slice;
@@ -31,7 +31,6 @@
     'head': 'first',
     'include': 'contains',
     'inject': 'reduce',
-    'intersect': 'intersection',
     'methods': 'functions',
     'select': 'filter',
     'tail': 'rest',
@@ -48,7 +47,6 @@
     'first': ['head', 'take'],
     'forEach': ['each'],
     'functions': ['methods'],
-    'intersection': ['intersect'],
     'map': ['collect'],
     'reduce': ['foldl', 'inject'],
     'reduceRight': ['foldr'],
@@ -62,7 +60,7 @@
     'after': [],
     'bind': [],
     'bindAll': ['bind'],
-    'chain': [],
+    'chain': ['mixin'],
     'clone': ['extend', 'isArray'],
     'compact': [],
     'compose': [],
@@ -74,15 +72,17 @@
     'delay': [],
     'difference': ['indexOf'],
     'escape': [],
-    'every': ['bind', 'createIterator', 'identity'],
+    'every': ['createIterator', 'identity'],
     'extend': ['createIterator'],
-    'filter': ['bind', 'createIterator', 'identity'],
+    'filter': ['createIterator', 'identity'],
     'find': ['createIterator'],
     'first': [],
     'flatten': ['isArray'],
-    'forEach': ['bind', 'createIterator'],
+    'forEach': ['createIterator'],
+    'forIn': ['createIterator'],
+    'forOwn': ['createIterator'],
     'functions': ['createIterator'],
-    'groupBy': ['bind', 'createIterator'],
+    'groupBy': ['createIterator'],
     'has': [],
     'identity': [],
     'indexOf': ['sortedIndex'],
@@ -108,10 +108,10 @@
     'keys': ['createIterator'],
     'last': [],
     'lastIndexOf': [],
-    'map': ['bind', 'createIterator', 'identity'],
+    'map': ['createIterator', 'identity'],
-    'max': ['bind'],
+    'max': [],
     'memoize': [],
-    'min': ['bind'],
+    'min': [],
     'mixin': ['forEach'],
     'noConflict': [],
     'once': [],
@@ -119,23 +119,23 @@
     'pick': [],
     'pluck': ['createIterator'],
     'range': [],
-    'reduce': ['bind', 'createIterator'],
+    'reduce': ['createIterator'],
-    'reduceRight': ['bind', 'keys'],
+    'reduceRight': ['keys'],
-    'reject': ['bind', 'createIterator', 'identity'],
+    'reject': ['createIterator', 'identity'],
     'rest': [],
     'result': [],
     'shuffle': [],
     'size': ['keys'],
-    'some': ['bind', 'createIterator', 'identity'],
+    'some': ['createIterator', 'identity'],
-    'sortBy': ['bind', 'map', 'pluck'],
+    'sortBy': ['map', 'pluck'],
-    'sortedIndex': [],
+    'sortedIndex': ['identity'],
     'tap': [],
     'template': ['escape'],
     'throttle': [],
-    'times': ['bind'],
+    'times': [],
     'toArray': ['values'],
     'union': ['indexOf'],
-    'uniq': ['indexOf'],
+    'uniq': ['identity', 'indexOf'],
     'uniqueId': [],
     'values': ['createIterator'],
     'without': ['indexOf'],
@@ -143,6 +143,40 @@
     'zip': ['max', 'pluck']
   };
 
+  /** Names of all methods */
+  var allMethods = Object.keys(dependencyMap);
+
+  /** Names of methods to filter for the build */
+  var filterMethods = allMethods;
+
+  /** Used to specify whether `filterMethods` is used for exclusion or inclusion */
+  var filterType = process.argv.reduce(function(result, value) {
+    if (result) {
+      return result;
+    }
+    var pair = value.match(/^(category|exclude|include)=(.*)$/);
+    if (!pair) {
+      return result;
+    }
+
+    result = pair[1];
+    filterMethods = pair[2].split(/, */).map(getRealName);
+
+    if (result == 'category') {
+      // resolve method names belonging to each category
+      filterMethods = filterMethods.reduce(function(result, category) {
+        return result.concat(allMethods.filter(function(funcName) {
+          return RegExp('@category ' + category + '\\b', 'i').test(matchFunction(source, funcName));
+        }));
+      }, []);
+    }
+    else {
+      // remove nonexistent method names
+      filterMethods = lodash.intersection(allMethods, filterMethods);
+    }
+    return result;
+  }, '');
+
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -239,9 +273,9 @@
       // match a function declaration
       '( +)function ' + funcName + '\\b[\\s\\S]+?\\n\\1}|' +
       // match a variable declaration with `createIterator`
-      ' +var ' + funcName + ' *= *(?:[a-zA-Z]+ *\\|\\| *)?createIterator\\((?:{|[a-zA-Z])[\\s\\S]+?\\);|' +
+      ' +var ' + funcName + ' *=.*?createIterator\\((?:{|[a-zA-Z])[\\s\\S]+?\\);|' +
       // match a variable declaration with function expression
-      '( +)var ' + funcName + ' *= *(?:[a-zA-Z]+ *\\|\\| *)?function[\\s\\S]+?\\n\\2};' +
+      '( +)var ' + funcName + ' *=.*?function[\\s\\S]+?\\n\\2};' +
       // end non-capturing group
       ')\\n'
     ));
@@ -281,7 +315,6 @@
     if (!snippet) {
       return source;
     }
-
     // remove function
     source = source.replace(matchFunction(source, funcName), '');
 
@@ -330,70 +363,45 @@
     return removeFromCreateIterator(source, varName);
   }
 
-  /*--------------------------------------------------------------------------*/
+  /**
-
+   * Removes non-syntax critical whitespace from a string.
-  // inline `iteratorTemplate`
+   *
-  (function() {
+   * @private
-    var iteratorTemplate = lodash._iteratorTemplate,
+   * @param {String} source The source to process.
-        code = /^function[^{]+{([\s\S]+?)}$/.exec(iteratorTemplate)[1];
+   * @returns {String} Returns the source with whitespace removed.
-
+   */
-    // remove whitespace from template
+  function removeWhitespace(source) {
-    code = code.replace(/\[object |else if|function | in |return\s+[\w']|throw |typeof |var |\\\\n|\\n|\s+/g, function(match) {
+    return source.replace(/\[object |else if|function | in |return\s+[\w']|throw |typeof |var |@ |\\\\n|\\n|\s+/g, function(match) {
       return match == false || match == '\\n' ? '' : match;
     });
-
+  }
-    // remove unnecessary code
-    code = code
-      .replace(/\|\|\{\}|,__t,__j=Array.prototype.join|function print[^}]+}|\+''/g, '')
-      .replace(/(\{);|;(\})/g, '$1$2')
-      .replace(/\(\(__t=\(([^)]+)\)\)==null\?'':__t\)/g, '$1');
-
-    // ensure escaped characters are interpreted correctly inside the `Function()` string
-    code = code.replace(/\\/g, '\\\\');
-
-    // add `code` to `Function()`
-    code = '$1Function(\'object\',\n$2  "' + code + '"\n$2);\n';
-
-    // replace `template()` with `Function()`
-    source = source.replace(/(( +)var iteratorTemplate *= *)([\s\S]+?\n\2.+?);\n/, code);
-
-    // remove pseudo private property `_iteratorTemplate`
-    source = source.replace(/(?:\s*\/\/.*)*\s*lodash\._iteratorTemplate\b.+\n/, '\n');
-  }());
 
   /*--------------------------------------------------------------------------*/
 
   // custom build
-  process.argv.some(function(arg) {
+  (function() {
-    // exit early if not the "exclude" or "include" command option
+    // exit early if "category", "exclude", or "include" options aren't specified
-    var pair = arg.match(/^(exclude|include)=(.*)$/);
+    if (!filterType) {
-    if (!pair) {
+      return;
-      return false;
     }
-
-    var filterType = pair[1],
-        filterNames = lodash.intersection(Object.keys(dependencyMap), pair[2].split(/, */).map(getRealName));
-
-    // set custom build flag
-    isCustom = true;
-
-    // remove the specified functions and their dependants
     if (filterType == 'exclude') {
-      filterNames.forEach(function(funcName) {
+      // remove methods that are named in `filterMethods` and their dependants
+      filterMethods.forEach(function(funcName) {
         getDependants(funcName).concat(funcName).forEach(function(otherName) {
           source = removeFunction(source, otherName);
         });
       });
     }
-    // else remove all but the specified functions and their dependencies
     else {
-      filterNames = lodash.uniq(filterNames.reduce(function(result, funcName) {
+      // add dependencies to `filterMethods`
+      filterMethods = lodash.uniq(filterMethods.reduce(function(result, funcName) {
         result.push.apply(result, getDependencies(funcName).concat(funcName));
         return result;
       }, []));
 
+      // remove methods that aren't named in `filterMethods`
       lodash.each(dependencyMap, function(dependencies, otherName) {
-        if (filterNames.indexOf(otherName) < 0) {
+        if (filterMethods.indexOf(otherName) < 0) {
           source = removeFunction(source, otherName);
         }
       });
@@ -416,21 +424,28 @@
       // remove `templateSettings` assignment
       source = source.replace(/(?:\n +\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\/)?\n *lodash\.templateSettings[\s\S]+?};\n/, '');
     }
-    if (isRemoved(source, 'max', 'min')) {
-      source = removeVar(source, 'argsLimit');
-      // remove `argsLimit` try-catch
-      source = source.replace(/\n *try\s*\{[\s\S]+?argsLimit *=[\s\S]+?catch[^}]+}\n/, '');
-    }
     if (isRemoved(source, 'isArray', 'isEmpty', 'isEqual', 'size')) {
       source = removeVar(source, 'arrayClass');
     }
     if (isRemoved(source, 'bind', 'functions', 'groupBy', 'invoke', 'isEqual', 'isFunction', 'result', 'sortBy', 'toArray')) {
       source = removeVar(source, 'funcClass');
     }
+    if (isRemoved(source, 'bind')) {
+      source = removeVar(source, 'nativeBind');
+    }
+    if (isRemoved(source, 'isArray')) {
+      source = removeVar(source, 'nativeIsArray');
+    }
+    if (isRemoved(source, 'keys')) {
+      source = removeVar(source, 'nativeKeys');
+    }
     if (isRemoved(source, 'clone', 'isObject', 'keys')) {
       source = removeVar(source, 'objectTypes');
       source = removeFromCreateIterator(source, 'objectTypes');
     }
+    if (isRemoved(source, 'bind', 'isArray', 'keys')) {
+      source = removeVar(source, 'reNative');
+    }
     if (isRemoved(source, 'isEmpty', 'isEqual', 'isString', 'size')) {
       source = removeVar(source, 'stringClass');
     }
@@ -439,12 +454,65 @@
     source = source.replace(/(?:\s*\/\*-+\*\/\s*){2,}/g, function(separators) {
       return separators.match(/^\s*/)[0] + separators.slice(separators.lastIndexOf('/*'));
     });
+  }());
 
-    return true;
+  /*--------------------------------------------------------------------------*/
-  });
+
+  if (isMobile) {
+    // inline functions defined with `createIterator`
+    lodash.functions(lodash).forEach(function(funcName) {
+      // match `funcName` with pseudo private `_` prefixes removed to allow matching `shimKeys`
+      var reFunc = RegExp('(\\bvar ' + funcName.replace(/^_/, '') + ' *= *)createIterator\\(((?:{|[a-zA-Z])[\\s\\S]+?)\\);\\n');
+
+      // skip if not defined with `createIterator`
+      if (!reFunc.test(source)) {
+        return;
+      }
+      // extract and format the function's code
+      var code = (lodash[funcName] + '').replace(/\n(?:.*)/g, function(match) {
+        match = match.slice(1);
+        return (match == '}' ? '\n  ' : '\n    ') + match;
+      });
+
+      source = source.replace(reFunc, '$1' + code + ';\n');
+    });
+
+    // remove `iteratorTemplate`
+    source = removeVar(source, 'iteratorTemplate');
+
+    // remove JScript [[DontEnum]] fix from `isEqual`
+    source = source.replace(/(?:\s*\/\/.*\n)*( +)if *\(result *&& *hasDontEnumBug[\s\S]+?\n\1}\n/, '\n');
+
+    // remove IE `shift` and `splice` fix
+    source = source.replace(/(?:\s*\/\/.*\n)*( +)if *\(value.length *=== *0[\s\S]+?\n\1}\n/, '\n');
+  }
+  else {
+    // inline `iteratorTemplate` template
+    source = source.replace(/(( +)var iteratorTemplate *= *)([\s\S]+?\n\2.+?);\n/, (function() {
+      // extract `iteratorTemplate` code
+      var code = /^function[^{]+{([\s\S]+?)}$/.exec(lodash._iteratorTemplate)[1];
+
+      code = removeWhitespace(code)
+        // remove unnecessary code
+        .replace(/\|\|\{\}|,__t,__j=Array.prototype.join|function print[^}]+}|\+''/g, '')
+        .replace(/(\{);|;(\})/g, '$1$2')
+        .replace(/\(\(__t=\(([^)]+)\)\)==null\?'':__t\)/g, '$1')
+        // ensure escaped characters are interpreted correctly in the string literal
+        .replace(/\\/g, '\\\\');
+
+      // add `code` to `Function()` as a string literal to avoid strict mode
+      // errors caused by the required with-statement
+      return '$1Function(\'obj\',\n$2  "' + code + '"\n$2);\n';
+    }()));
+  }
+
+  // remove pseudo private properties
+  source = source.replace(/(?:(?:\s*\/\/.*)*\s*lodash\._[^=]+=.+\n)+/g, '\n');
+
+  /*--------------------------------------------------------------------------*/
 
   // begin the minification process
-  if (isCustom) {
+  if (filterType || isMobile) {
     fs.writeFileSync(path.join(__dirname, 'lodash.custom.js'), source);
     minify(source, 'lodash.custom.min', function(result) {
       fs.writeFileSync(path.join(__dirname, 'lodash.custom.min.js'), result);

build/pre-compile.js

@@ -8,33 +8,24 @@
   /** Used to minify variables embedded in compiled strings */
   var compiledVars = [
     'accumulator',
-    'args',
-    'array',
     'arrayClass',
-    'bind',
     'callback',
     'className',
     'collection',
-    'concat',
     'ctor',
     'false',
     'funcClass',
     'hasOwnProperty',
     'identity',
     'index',
-    'indexOf',
+    'iteratorBind',
-    'isArray',
-    'isEmpty',
-    'isFunc',
     'length',
     'object',
     'objectTypes',
     'noaccum',
-    'prop',
     'property',
     'result',
     'skipProto',
-    'slice',
     'source',
     'sourceIndex',
     'stringClass',
@@ -71,9 +62,10 @@
   /** Used to minify variables and string values to a single character */
   var minNames = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
 
-  /** Used protect the specified properties from getting minified */
+  /** Used to protect the specified properties from getting minified */
   var propWhitelist = [
     '_',
+    '_chain',
     '_wrapped',
     'after',
     'all',
@@ -109,6 +101,8 @@
     'foldl',
     'foldr',
     'forEach',
+    'forIn',
+    'forOwn',
     'functions',
     'groupBy',
     'has',
@@ -119,7 +113,6 @@
     'initial',
     'inject',
     'interpolate',
-    'intersect',
     'intersection',
     'invoke',
     'isArguments',
@@ -177,7 +170,6 @@
     'throttle',
     'times',
     'toArray',
-    'toArray',
     'union',
     'uniq',
     'unique',
@@ -203,21 +195,30 @@
     // remove copyright to add later in post-compile.js
     source = source.replace(/\/\*![\s\S]+?\*\//, '');
 
-    // correct JSDoc tags for Closure Compiler
+    // remove unrecognized JSDoc tags so Closure Compiler won't complain
     source = source.replace(/@(?:alias|category)\b.*/g, '');
 
     // add brackets to whitelisted properties so Closure Compiler won't mung them
     // http://code.google.com/closure/compiler/docs/api-tutorial3.html#export
     source = source.replace(RegExp('\\.(' + propWhitelist.join('|') + ')\\b', 'g'), "['$1']");
 
+    // remove brackets from `_.escape(__t)` in `tokenizeEscape`
+    source = source.replace("_['escape'](__t)", '_.escape(__t)');
+
     // remove whitespace from string literals
     source = source.replace(/'(?:(?=(\\?))\1.)*?'/g, function(string) {
-      // avoids removing the '\n' of the `escapes` object
+      // avoids removing the '\n' of the `stringEscapes` object
-      return string.replace(/\[object |else if|function | in |return\s+[\w']|throw |typeof |use strict|var |'\\n'|\\\\n|\\n|\s+/g, function(match) {
+      return string.replace(/\[object |else if|function | in |return\s+[\w']|throw |typeof |use strict|var |@ |'\\n'|\\\\n|\\n|\s+/g, function(match) {
         return match == false || match == '\\n' ? '' : match;
       });
     });
 
+    // remove newline from double-quoted string in `_.template`
+    source = source.replace('"\';\\n"', '"\';"');
+
+    // remove debug sourceURL in `_.template`
+    source = source.replace(/\+(?:\s*\/\/.*)*\s*'\/\/@ sourceURL=[^;]+/, '');
+
     // minify `_.sortBy` internal properties
     (function() {
       var properties = ['criteria', 'value'],
@@ -286,7 +287,7 @@
         // correct external boolean literals
         else if (variable == 'true' || variable == 'false') {
           result = result
-            .replace(RegExp(': *' + minNames[index] + ',', 'g'), ':' + variable + ',')
+            .replace(RegExp(': *' + minNames[index] + '([,\\n])', 'g'), ':' + variable + '$1')
             .replace(RegExp('\\b' + minNames[index] + ';', 'g'), variable + ';');
         }
       });

doc/parse.php

@@ -21,8 +21,8 @@
   // generate Markdown
   $markdown = docdown(array(
     'path' => '../' . $file,
-    'title' => 'Lo-Dash <sup>v0.2.0</sup>',
+    'title' => 'Lo-Dash <sup>v0.3.0</sup>',
-    'url'  => 'https://github.com/bestiejs/lodash/blob/master/lodash.js'
+    'url'  => 'https://github.com/bestiejs/lodash/blob/v0.3.0/lodash.js'
   ));
 
   // save to a .md file

lodash.min.js

@@ -1,30 +1,32 @@
 /*!
- Lo-Dash 0.2.0 lodash.com/license
+ Lo-Dash 0.3.0 lodash.com/license
  Underscore.js 1.3.3 github.com/documentcloud/underscore/blob/master/LICENSE
 */
-;(function(u,m){"use strict";function R(a){return"[object Arguments]"==h.call(a)}function c(a){return new p(a)}function p(a){if(a&&a._wrapped)return a;this._wrapped=a}function j(){for(var a,b,d,k=-1,c=arguments.length,f={e:"",f:"",k:"",q:"",c:{m:"++o<t"},o:{}};++k<c;)for(b in a=arguments[k],a)d=(d=a[b])==o?"":d,/d|m|j/.test(b)?("string"==typeof d&&(d={b:d,n:d}),f.c[b]=d.b,f.o[b]=d.n):f[b]=d;a=f.a,b=f.c,d=f.o;var k=/^[^,]+/.exec(a)[0],c=d.m,g=/\S+$/.exec(c||k)[0];f.g=k,f.i=H,f.h="m.call("+g+",o)",f
+;(function(e,t){"use strict";function s(e){return"[object Arguments]"==nt.call(e)}function o(e){return new u(e)}function u(e){if(e&&e._wrapped)return e;this._wrapped=e}function a(){for(var e,t,s,o=-1,u=arguments.length,a={e:"",f:"",k:"",q:"",c:{d:"",m:"++k<m"},o:{d:""}};++o<u;)for(t in e=arguments[o],e)s=(s=e[t])==r?"":s,/d|m|j/.test(t)?("string"==typeof s&&(s={b:s,n:s}),a.c[t]=s.b,a.o[t]=s.n):a[t]=s;e=a.a,t=a.c,s=a.o;var o=/^[^,]+/.exec(e)[0],u=s.m,f=/\S+$/.exec(u||o)[0];a.g=o,a.i=O,a.h="i.call("+
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+(n=h(n,r));return St(Et(e,function(t,r){return{a:n(t,r,e),b:t}}).sort(function(e,n){var r=e.a,i=n.a;return r===t?1:i===t?-1:r<i?-1:r>i?1:0}),"b")},o.sortedIndex=x,o.tap=function(e,t){return t(e),e},o.template=function(e,t,n){n||(n={});var i;i=o.templateSettings;var s=n.escape,u=n.evaluate,a=n.interpolate,n=n.variable;return s==r&&(s=i.escape),u==r&&(u=i.evaluate),a==r&&(a=i.interpolate),s&&(e=e.replace(s,d)),a&&(e=e.replace(a,v)),u&&(e=e.replace(u,m)),e="__p='"+e.replace(B,l).replace(P,f)+"';",I.
-;++a<c;)0>w(b,d[a])&&b.push(d[a]);return b},c.uniq=ka,c.uniqueId=function(a){var b=Aa++;return a?a+b:b},c.values=ra,c.without=function(a){for(var b=l.call(arguments,1),d=-1,c=a.length,e=[];++d<c;)0>w(b,a[d])&&e.push(a[d]);return e},c.wrap=function(a,b){return function(){var c=[a];return arguments.length&&E.apply(c,arguments),b.apply(this,c)}},c.zip=function(){for(var a=-1,b=ia(Q(arguments,"length")),c=Array(b);++a<b;)c[a]=Q(arguments,a);return c},c.all=W,c.any=q,c.collect=$,c.detect=qa,c.each=F,c
+length=0,n||(n=i.variable,e="with("+n+"||{}){"+e+"}"),e="function("+n+"){var __p,__t,__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}"+e+"return __p}",i=Function("_","return "+e)(o),t?i(t):(i.source=e,i)},o.throttle=function(e,n){function r(){a=new Date,u=t,e.apply(o,i)}var i,s,o,u,a=0;return function(){var t=new Date,f=n-(t-a);return i=arguments,o=this,0>=f?(a=t,s=e.apply(o,i)):u||(u=at(r,f)),s}},o.times=function(e,t,n){var r=-1;if(n)for(;++r<e;)t.call(n,r);else for(;++r<e;
-.foldl=aa,c.foldr=ea,c.head=V,c.include=C,c.inject=aa,c.intersect=ha,c.methods=O,c.select=pa,c.tail=ja,c.take=V,c.unique=ka,p.prototype=c.prototype,oa(c),p.prototype.chain=function(){return this.s=n,this},p.prototype.value=function(){return this._wrapped},F("pop push reverse shift sort splice unshift".split(" "),function(a){var b=z[a];p.prototype[a]=function(){var a=this._wrapped;return arguments.length?b.apply(a,arguments):b.call(a),a.length===0&&delete a[0],this.s&&(a=new p(a),a.s=n),a}}),F(["concat"
+)t(r)},o.toArray=function(e){if(!e)return[];if(nt.call(e.toArray)==V)return e.toArray();var t=e.length;return t===t>>>0?tt.call(e):Tt(e)},o.union=function(){for(var e=-1,t=[],n=Y.apply(t,arguments),r=n.length;++e<r;)0>w(t,n[e])&&t.push(n[e]);return t},o.uniq=T,o.uniqueId=function(e){var t=M++;return e?e+t:t},o.values=Tt,o.without=function(e){for(var t=tt.call(arguments,1),n=-1,r=e.length,i=[];++n<r;)0>w(t,e[n])&&i.push(e[n]);return i},o.wrap=function(e,t){return function(){var n=[e];return arguments
-,"join","slice"],function(a){var b=z[a];p.prototype[a]=function(){var a=this._wrapped,a=arguments.length?b.apply(a,arguments):b.call(a);return this.s&&(a=new p(a),a.s=n),a}}),X?"object"==typeof module&&module&&module.t==X?(module.t=c)._=c:X._=c:(u._=c,typeof define=="function"&&typeof define.amd=="object"&&define.amd&&define(function(){return c}))})(this);
+.length&&et.apply(n,arguments),t.apply(this,n)}},o.zip=function(){for(var e=-1,t=E(St(arguments,"length")),n=Array(t);++e<t;)n[e]=St(arguments,e);return n},o.all=yt,o.any=ct,o.collect=Et,o.detect=bt,o.each=wt,o.foldl=xt,o.foldr=g,o.head=y,o.include=D,o.inject=xt,o.methods=Ct,o.select=G,o.tail=S,o.take=y,o.unique=T,u.prototype=o.prototype,L(o),u.prototype.chain=function(){return this._chain=n,this},u.prototype.value=function(){return this._wrapped},wt("pop push reverse shift sort splice unshift".split
+(" "),function(e){var t=Q[e];u.prototype[e]=function(){var e=this._wrapped;return arguments.length?t.apply(e,arguments):t.call(e),e.length===0&&delete e[0],this._chain&&(e=new u(e),e._chain=n),e}}),wt(["concat","join","slice"],function(e){var t=Q[e];u.prototype[e]=function(){var e=this._wrapped,e=arguments.length?t.apply(e,arguments):t.call(e);return this._chain&&(e=new u(e),e._chain=n),e}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(e._=o,define(function(){return o})):A?"object"==typeof 
+module&&module&&module.s==A?(module.s=o)._=o:A._=o:e._=o})(this);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "lodash",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "A drop-in replacement for Underscore.js that delivers performance improvements, bug fixes, and additional features.",
   "homepage": "http://lodash.com",
   "main": "lodash",

perf/index.html

@@ -9,14 +9,18 @@
 				padding: 0;
 				height: 100%;
 			}
+			applet {
+				position: absolute;
+				left: -9999em;
+			}
 		</style>
 	</head>
 	<body>
-		<script src="../lodash.min.js"></script>
+		<script src="../lodash.js"></script>
 		<script>
 			var lodash = _.noConflict();
 		</script>
-		<script src="../vendor/underscore/underscore-min.js"></script>
+		<script src="../vendor/underscore/underscore.js"></script>
 		<script src="../vendor/benchmark.js/benchmark.js"></script>
 		<script src="../vendor/firebug-lite/src/firebug-lite-debug.js"></script>
 		<script>
@@ -30,11 +34,13 @@
 			}());
 
 			window.onload = function() {
-				var sibling = document.getElementsByTagName('script')[0],
+				var fbUI = document.getElementById('FirebugUI'),
+				    fbDoc = (fbDoc = fbUI.contentWindow || fbUI.contentDocument).document || fbDoc,
+				    sibling = document.getElementsByTagName('script')[0],
 				    script = document.createElement('script');
 
-				document.getElementById('FirebugUI').style.height = '100%';
+				fbUI.style.height = fbDoc.body.style.height = fbDoc.documentElement.style.height = '100%';
-				script.src = 'perf.js';
+				script.src = 'perf.js?t=' + (+new Date);
 				sibling.parentNode.insertBefore(script, sibling);
 			};
 		</script>

perf/perf.js

@@ -13,7 +13,7 @@
   /** Load Lo-Dash */
   var lodash =
     window.lodash || (
-      lodash = load('../lodash.min.js') || window._,
+      lodash = load('../lodash.js') || window._,
       lodash = lodash._ || lodash,
       lodash.noConflict()
     );
@@ -21,10 +21,15 @@
   /** Load Underscore */
   var _ =
     window._ || (
-      _ = load('../vendor/underscore/underscore-min.js') || window._,
+      _ = load('../vendor/underscore/underscore.js') || window._,
       _._ || _
     );
 
+  /** Used to access the Firebug Lite panel */
+  var fbPanel = (fbPanel = window.document && document.getElementById('FirebugUI')) &&
+    (fbPanel = (fbPanel = fbPanel.contentWindow || fbPanel.contentDocument).document || fbPanel) &&
+    fbPanel.getElementById('fbPanel1');
+
   /** Used to score Lo-Dash and Underscore performance */
   var score = { 'lodash': 0, 'underscore': 0 };
 
@@ -41,43 +46,112 @@
 
   /*--------------------------------------------------------------------------*/
 
+  /**
+   * Logs text to the console.
+   *
+   * @private
+   * @param {String} text The text to log.
+   */
+  function log(text) {
+    console.log(text);
+    if (fbPanel) {
+      // scroll the Firebug Lite panel down
+      fbPanel.scrollTop = fbPanel.scrollHeight;
+    }
+  }
+
+  /*--------------------------------------------------------------------------*/
+
   lodash.extend(Benchmark.options, {
     'async': true,
     'setup': function() {
       var window = Function('return this || global')(),
           _ = window._,
-          lodash = window.lodash,
+          lodash = window.lodash;
-          numbers = [],
-          object = {};
 
-      for (var index = 0; index < 20; index++) {
+      var length = 20,
+          numbers = [],
+          object = {},
+          fourNumbers = [5, 25, 10, 30],
+          nestedNumbers = [1, [2], [3, [[4]]]],
+          twoNumbers = [12, 21];
+
+      var ctor = function() { },
+          func = function(greeting) { return greeting + ': ' + this.name; };
+
+      var lodashBoundNormal = lodash.bind(func, { 'name': 'moe' }),
+          lodashBoundCtor = lodash.bind(ctor, { 'name': 'moe' }),
+          lodashBoundPartial = lodash.bind(func, { 'name': 'moe' }, 'hi');
+
+      var _boundNormal = _.bind(func, { 'name': 'moe' }),
+          _boundCtor = _.bind(ctor, { 'name': 'moe' }),
+          _boundPartial = _.bind(func, { 'name': 'moe' }, 'hi');
+
+      var wordToNumber = {
+        'one': 1,
+        'two': 2,
+        'three': 3,
+        'four': 4,
+        'five': 5,
+        'six': 6,
+        'seven': 7,
+        'eight': 8,
+        'nine': 9,
+        'ten': 10,
+        'eleven': 11,
+        'twelve': 12,
+        'thirteen': 13,
+        'fourteen': 14,
+        'fifteen': 15,
+        'sixteen': 16,
+        'seventeen': 17,
+        'eighteen': 18,
+        'nineteen': 19,
+        'twenty': 20,
+        'twenty-one': 21,
+        'twenty-two': 22,
+        'twenty-three': 23,
+        'twenty-four': 24,
+        'twenty-five': 25
+      };
+
+      var words = _.keys(wordToNumber).slice(0, length);
+
+      for (var index = 0; index < length; index++) {
         numbers[index] = index;
         object['key' + index] = index;
       }
 
-      var objects = lodash.map(numbers, function(n) {
+      var objects = lodash.map(numbers, function(num) {
-        return { 'num': n };
+        return { 'num': num };
       });
     }
   });
 
   lodash.extend(Benchmark.Suite.options, {
     'onStart': function() {
-      console.log('\n' + this.name + ':');
+      log('\n' + this.name + ':');
     },
     'onCycle': function(event) {
-      console.log(event.target + '');
+      log(event.target + '');
     },
     'onComplete': function() {
-      var fastest = this.filter('fastest').pluck('name'),
+      var formatNumber = Benchmark.formatNumber,
+          fastest = this.filter('fastest'),
+          slowest = this.filter('slowest'),
           lodashHz = 1 / (this[0].stats.mean + this[0].stats.moe),
           underscoreHz = 1 / (this[1].stats.mean + this[1].stats.moe);
 
       if (fastest.length > 1) {
-        console.log('It\'s too close to call.');
+        log('It\'s too close to call.');
         lodashHz = underscoreHz = Math.min(lodashHz, underscoreHz);
-      } else {
+      }
-        console.log(fastest + ' is the fastest.');
+      else {
+        var fastestHz = fastest[0] == this[0] ? lodashHz : underscoreHz,
+            slowestHz = slowest[0] == this[0] ? lodashHz : underscoreHz,
+            percent = formatNumber(Math.round(((fastestHz / slowestHz) - 1) * 100));
+
+        log(fastest[0].name + ' is ' + percent + '% faster.');
       }
       // add score adjusted for margin of error
       score.lodash += lodashHz;
@@ -91,11 +165,17 @@
         suites[0].run();
       }
       else {
+        var fastestTotalHz = Math.max(score.lodash, score.underscore),
+            slowestTotalHz = Math.min(score.lodash, score.underscore),
+            totalPercent = formatNumber(Math.round(((fastestTotalHz  / slowestTotalHz) - 1) * 100)),
+            totalX = fastestTotalHz / slowestTotalHz,
+            message = ' is ' + totalPercent + '% ' + (totalX == 1 ? '' : '(' + formatNumber(totalX.toFixed(2)) + 'x) ') + 'faster than ';
+
         // report results
         if (score.lodash >= score.underscore) {
-          console.log('\nLo-Dash is ' + (score.lodash / score.underscore).toFixed(2) + 'x faster than Underscore.');
+          log('\nLo-Dash' + message + 'Underscore.');
         } else {
-          console.log('\nUnderscore is ' + (score.underscore / score.lodash).toFixed(2) + 'x faster than Lo-Dash.');
+          log('\nUnderscore' + message + 'Lo-Dash.');
         }
       }
     }
@@ -103,18 +183,88 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('bind call')
+      .add('Lo-Dash', function() {
+        lodash.bind(func, { 'name': 'moe' }, 'hi');
+      })
+      .add('Underscore', function() {
+        _.bind(func, { 'name': 'moe' }, 'hi');
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('bound')
+      .add('Lo-Dash', function() {
+        lodashBoundNormal();
+      })
+      .add('Underscore', function() {
+        _boundNormal();
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('bound partial')
+      .add('Lo-Dash', function() {
+        lodashBoundPartial();
+      })
+      .add('Underscore', function() {
+        _boundPartial();
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('bound constructor')
+      .add('Lo-Dash', function() {
+        new lodashBoundCtor();
+      })
+      .add('Underscore', function() {
+        new _boundCtor();
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('each array')
       .add('Lo-Dash', function() {
-        var timesTwo = [];
+        var result = [];
-        lodash.each(numbers, function(num) {
+        lodash.each(numbers, function(num) { result.push(num * 2); });
-          timesTwo.push(num * 2);
+      })
+      .add('Underscore', function() {
+        var result = [];
+        _.each(numbers, function(num) { result.push(num * 2); });
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('each array thisArg')
+      .add('Lo-Dash', function() {
+        var result = [];
+        lodash.each(numbers, function(num, index) {
+          result.push(num + this['key' + index]);
+        }, object);
+      })
+      .add('Underscore', function() {
+        var result = [];
+        _.each(numbers, function(num, index) {
+          result.push(num + this['key' + index]);
+        }, object);
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('each object')
+      .add('Lo-Dash', function() {
+        var result = [];
+        lodash.each(object, function(num) {
+          result.push(num * 2);
         });
       })
       .add('Underscore', function() {
-        var timesTwo = [];
+        var result = [];
-        _.each(numbers, function(num) {
+        _.each(object, function(num) {
-          timesTwo.push(num * 2);
+          result.push(num * 2);
         });
       })
   );
@@ -122,23 +272,111 @@
   /*--------------------------------------------------------------------------*/
 
   suites.push(
-    Benchmark.Suite('each object')
+    Benchmark.Suite('find')
       .add('Lo-Dash', function() {
-        var timesTwo = [];
+        lodash.find(numbers, function(num) {
-        lodash.each(object, function(num) {
+          return num === 19;
-          timesTwo.push(num * 2);
         });
       })
       .add('Underscore', function() {
-        var timesTwo = [];
+        _.find(numbers, function(num) {
-        _.each(object, function(num) {
+          return num === 19;
-          timesTwo.push(num * 2);
         });
       })
   );
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('flatten deep')
+      .add('Lo-Dash', function() {
+        lodash.flatten(nestedNumbers);
+      })
+      .add('Underscore', function() {
+        _.flatten(nestedNumbers);
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('flatten shallow')
+      .add('Lo-Dash', function() {
+        lodash.flatten(nestedNumbers, true);
+      })
+      .add('Underscore', function() {
+        _.flatten(nestedNumbers, true);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('difference')
+      .add('Lo-Dash', function() {
+        lodash.difference(numbers, fourNumbers);
+      })
+      .add('Underscore', function() {
+        _.difference(numbers, fourNumbers);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('groupBy callback')
+      .add('Lo-Dash', function() {
+        lodash.groupBy(numbers, function(num) { return num >> 1; });
+      })
+      .add('Underscore', function() {
+        _.groupBy(numbers, function(num) { return num >> 1; });
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('groupBy property name')
+      .add('Lo-Dash', function() {
+        lodash.groupBy(words, 'length');
+      })
+      .add('Underscore', function() {
+        _.groupBy(words, 'length');
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('indexOf')
+      .add('Lo-Dash', function() {
+        lodash.indexOf(numbers, 9);
+      })
+      .add('Underscore', function() {
+        _.indexOf(numbers, 9);
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('indexOf isSorted')
+      .add('Lo-Dash', function() {
+        lodash.indexOf(numbers, 19, true);
+      })
+      .add('Underscore', function() {
+        _.indexOf(numbers, 19, true);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('intersection')
+      .add('Lo-Dash', function() {
+        lodash.intersection(numbers, fourNumbers, twoNumbers);
+      })
+      .add('Underscore', function() {
+        _.intersection(numbers, fourNumbers, twoNumbers);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('keys')
       .add('Lo-Dash', function() {
@@ -151,20 +389,82 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('lastIndexOf')
+      .add('Lo-Dash', function() {
+        lodash.lastIndexOf(numbers, 9);
+      })
+      .add('Underscore', function() {
+        _.lastIndexOf(numbers, 9);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('map')
       .add('Lo-Dash', function() {
-        lodash.map(objects, function(obj) {
+        lodash.map(objects, function(value) {
-          return obj.num;
+          return value.num;
         });
       })
       .add('Underscore', function() {
-        _.map(objects, function(obj) {
+        _.map(objects, function(value) {
-          return obj.num;
+          return value.num;
         });
       })
   );
 
+  suites.push(
+    Benchmark.Suite('map thisArg')
+      .add('Lo-Dash', function() {
+        lodash.map(objects, function(value, index) {
+          return this['key' + index] + value.num;
+        }, object);
+      })
+      .add('Underscore', function() {
+        _.map(objects, function(value, index) {
+          return this['key' + index] + value.num;
+        }, object);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('max')
+      .add('Lo-Dash', function() {
+        lodash.max(numbers);
+      })
+      .add('Underscore', function() {
+        _.max(numbers);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('min')
+      .add('Lo-Dash', function() {
+        lodash.min(numbers);
+      })
+      .add('Underscore', function() {
+        _.min(numbers);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('pick')
+      .add('Lo-Dash', function() {
+        lodash.pick(object, 'key6', 'key13');
+      })
+      .add('Underscore', function() {
+        _.pick(object, 'key6', 'key13');
+      })
+  );
+
   /*--------------------------------------------------------------------------*/
 
   suites.push(
@@ -179,6 +479,128 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('sortBy callback')
+      .add('Lo-Dash', function() {
+        lodash.sortBy(numbers, function(num) { return Math.sin(num); });
+      })
+      .add('Underscore', function() {
+        _.sortBy(numbers, function(num) { return Math.sin(num); });
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('sortBy callback thisArg')
+      .add('Lo-Dash', function() {
+        lodash.sortBy(numbers, function(num) { return this.sin(num); }, Math);
+      })
+      .add('Underscore', function() {
+        _.sortBy(numbers, function(num) { return this.sin(num); }, Math);
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('sortBy property name')
+      .add('Lo-Dash', function() {
+        lodash.sortBy(words, 'length');
+      })
+      .add('Underscore', function() {
+        _.sortBy(words, 'length');
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('sortedIndex')
+      .add('Lo-Dash', function() {
+        lodash.sortedIndex(numbers, 25);
+      })
+      .add('Underscore', function() {
+        _.sortedIndex(numbers, 25);
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('sortedIndex callback')
+      .add('Lo-Dash', function() {
+        lodash.sortedIndex(words, 'twenty-five', function(value) {
+          return wordToNumber[value];
+        });
+      })
+      .add('Underscore', function() {
+        _.sortedIndex(words, 'twenty-five', function(value) {
+          return wordToNumber[value];
+        });
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('times')
+      .add('Lo-Dash', function() {
+        var result = [];
+        lodash.times(length, function(n) { result.push(n); });
+      })
+      .add('Underscore', function() {
+        var result = [];
+        _.times(length, function(n) { result.push(n); });
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('times thisArg')
+      .add('Lo-Dash', function() {
+        var result = [];
+        lodash.times(length, function(n) { result.push(this.sin(n)); }, Math);
+      })
+      .add('Underscore', function() {
+        var result = [];
+        _.times(length, function(n) { result.push(this.sin(n)); }, Math);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('union')
+      .add('Lo-Dash', function() {
+        lodash.union(numbers, fourNumbers, twoNumbers);
+      })
+      .add('Underscore', function() {
+        _.union(numbers, fourNumbers, twoNumbers);
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
+  suites.push(
+    Benchmark.Suite('uniq')
+      .add('Lo-Dash', function() {
+        lodash.uniq(numbers.concat(fourNumbers, twoNumbers));
+      })
+      .add('Underscore', function() {
+        _.uniq(numbers.concat(fourNumbers, twoNumbers));
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('uniq callback')
+      .add('Lo-Dash', function() {
+        lodash.uniq(numbers.concat(fourNumbers, twoNumbers), function(num) {
+          return num % 2;
+        });
+      })
+      .add('Underscore', function() {
+        _.uniq(numbers.concat(fourNumbers, twoNumbers), function(num) {
+          return num % 2;
+        });
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('values')
       .add('Lo-Dash', function() {
@@ -192,9 +614,10 @@
   /*--------------------------------------------------------------------------*/
 
   if (Benchmark.platform + '') {
-    console.log(Benchmark.platform + '');
+    log(Benchmark.platform + '');
   }
   // start suites
+  log('\nSit back and relax, this may take a while.');
   suites[0].run();
 
 }(typeof global == 'object' && global || this));

test/test.js

@@ -37,6 +37,17 @@
     'valueOf': 7
   };
 
+  /** Used to check problem JScript properties too */
+  var shadowedKeys = [
+    'constructor',
+    'hasOwnProperty',
+    'isPrototypeOf',
+    'propertyIsEnumerable',
+    'toLocaleString',
+    'toString',
+    'valueOf'
+  ];
+
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -92,7 +103,7 @@
       ok(_() instanceof _);
     });
 
-    test('should pass through LoDash instances', function() {
+    test('should return passed LoDash instances', function() {
       var wrapped = _([]);
       equal(_(wrapped), wrapped);
     });
@@ -142,6 +153,10 @@
     test('should not escape the ">" character', function() {
       equal(_.escape('>'), '>');
     });
+
+    test('should not escape the "/" character', function() {
+      equal(_.escape('/'), '/');
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -174,26 +189,120 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.find');
+
+  (function() {
+    var array = [1, 2, 3];
+
+    test('should return found `value`', function() {
+      equal(_.find(array, function(n) { return n > 2; }), 3);
+    });
+
+    test('should return `undefined` if `value` is not found', function() {
+      equal(_.find(array, function(n) { return n == 4; }), undefined);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
+  QUnit.module('lodash.flatten');
+
+  (function() {
+    test('should treat sparse arrays as dense', function() {
+      var array = [[1, 2, 3], Array(3)],
+          expected = [1, 2, 3],
+          actual1 = _.flatten(array),
+          actual2 = _.flatten(array, true);
+
+      expected.push(undefined, undefined, undefined);
+
+      deepEqual(actual1, expected);
+      ok('4' in actual1);
+
+      deepEqual(actual2, expected);
+      ok('4' in actual2);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash.forEach');
 
   (function() {
     test('returns the collection', function() {
-      var collection = [1, 2, 3, 4];
+      var collection = [1, 2, 3];
       equal(_.forEach(collection, Boolean), collection);
     });
 
-    test('fixes the JScript [[DontEnum]] bug (test in IE < 9)', function() {
+    test('should treat array-like object with invalid `length` as a regular object', function() {
-      var object = {};
+      var keys = [],
-      _.forEach(shadowed, function(value, key) {
+          object = { 'length': -1 };
-        object[key] = value;
-      });
 
-      deepEqual(object, shadowed);
+      _.forEach(object, function(value, key) { keys.push(key); });
+      deepEqual(keys, ['length']);
     });
   }());
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.forIn');
+
+  (function() {
+    test('iterates over inherited properties', function() {
+      function Dog(name) { this.name = name; }
+      Dog.prototype.bark = function() { /* Woof, woof! */ };
+
+      var keys = [];
+      _.forIn(new Dog('Dagny'), function(value, key) { keys.push(key); });
+      deepEqual(keys.sort(), ['bark', 'name']);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
+  QUnit.module('lodash.forOwn');
+
+  (function() {
+    test('iterates over the `length` property', function() {
+      var keys = [],
+          object = { '0': 'zero', '1': 'one', 'length': 2 };
+
+      _.forOwn(object, function(value, key) { keys.push(key); });
+      deepEqual(keys.sort(), ['0', '1', 'length']);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
+  _.each(['forEach', 'forIn', 'forOwn'], function(methodName) {
+    var func = _[methodName];
+    QUnit.module('lodash.' + methodName + ' iteration bugs');
+
+    test('fixes the JScript [[DontEnum]] bug (test in IE < 9)', function() {
+      var keys = [];
+      func(shadowed, function(value, key) { keys.push(key); });
+      deepEqual(keys.sort(), shadowedKeys);
+    });
+
+    test('skips the prototype property of functions (test in Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1)', function() {
+      function Foo() {}
+      Foo.prototype.a = 1;
+
+      var keys = [];
+      function callback(value, key) { keys.push(key); }
+
+      func(Foo, callback);
+      deepEqual(keys, []);
+      keys.length = 0;
+
+      Foo.prototype = { 'a': 1 };
+      func(Foo, callback);
+      deepEqual(keys, []);
+    });
+  });
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash.groupBy');
 
   (function() {
@@ -204,6 +313,51 @@
 
       deepEqual(actual, { '1': [1.3], '2': [2.1, 2.4] });
     });
+
+    test('should only add elements to own, not inherited, properties', function() {
+      var actual = _.groupBy([1.3, 2.1, 2.4], function(num) {
+        return Math.floor(num) > 1 ? 'hasOwnProperty' : 'constructor';
+      });
+
+      deepEqual(actual.constructor, [1.3]);
+      deepEqual(actual.hasOwnProperty, [2.1, 2.4]);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
+  QUnit.module('lodash.indexOf');
+
+  (function() {
+    var array = [1, 2, 3, 1, 2, 3];
+
+    test('should work with a positive `fromIndex`', function() {
+      equal(_.indexOf(array, 1, 2), 3);
+    });
+
+    test('should work with `fromIndex` >= `array.length`', function() {
+      equal(_.indexOf(array, 1, 6), -1);
+      equal(_.indexOf(array, undefined, 6), -1);
+      equal(_.indexOf(array, 1, 8), -1);
+      equal(_.indexOf(array, undefined, 8), -1);
+    });
+
+    test('should work with a negative `fromIndex`', function() {
+      equal(_.indexOf(array, 2, -3), 4);
+    });
+
+    test('should work with a negative `fromIndex` <= `-array.length`', function() {
+      equal(_.indexOf(array, 1, -6), 0);
+      equal(_.indexOf(array, 2, -8), 1);
+    });
+
+    test('should ignore non-number `fromIndex` values', function() {
+      equal(_.indexOf([1, 2, 3], 1, '1'), 0);
+    });
+
+    test('should work with `isSorted`', function() {
+      equal(_.indexOf([1, 2, 3], 1, true), 0);
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -212,7 +366,7 @@
 
   (function() {
     test('returns an empty collection for `n` of `0`', function() {
-      var array = [1, 2, 3, 4];
+      var array = [1, 2, 3];
       deepEqual(_.initial(array, 0), []);
     });
   }());
@@ -225,6 +379,15 @@
     test('fixes the JScript [[DontEnum]] bug (test in IE < 9)', function() {
       equal(_.isEmpty(shadowed), false);
     });
+
+    test('skips the prototype property of functions (test in Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1)', function() {
+      function Foo() {}
+      Foo.prototype.a = 1;
+      equal(_.isEmpty(Foo), true);
+
+      Foo.prototype = { 'a': 1 };
+      equal(_.isEmpty(Foo), true);
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -257,30 +420,54 @@
       Foo.prototype.a = 1;
 
       deepEqual(_.keys(Foo.prototype), ['a']);
-      deepEqual(_.keys(shadowed).sort(),
+      deepEqual(_.keys(shadowed).sort(), shadowedKeys);
-        'constructor hasOwnProperty isPrototypeOf propertyIsEnumerable toLocaleString toString valueOf'.split(' '));
+    });
+
+    test('skips the prototype property of functions (test in Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1)', function() {
+      function Foo() {}
+      Foo.prototype.c = 3;
+
+      Foo.a = 1;
+      Foo.b = 2;
+
+      var expected = ['a', 'b'];
+      deepEqual(_.keys(Foo), expected);
+
+      Foo.prototype = { 'c': 3 };
+      deepEqual(_.keys(Foo), expected);
     });
   }());
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.lastIndexOf');
+
   (function() {
-    var i = -1,
+    var array = [1, 2, 3, 1, 2, 3];
-        largeArray = [];
 
-    while (++i <= 1e6) {
+    test('should work with a positive `fromIndex`', function() {
-      largeArray[i] = i;
+      equal(_.lastIndexOf(array, 1, 2), 0);
-    }
+    });
-    _.each(['max', 'min'], function(methodName) {
-      QUnit.module('lodash.' + methodName);
 
-      test('does not error when computing the ' + methodName + ' value of massive arrays', function() {
+    test('should work with `fromIndex` >= `array.length`', function() {
-        try {
+      equal(_.lastIndexOf(array, undefined, 6), -1);
-          var actual = _[methodName](largeArray);
+      equal(_.lastIndexOf(array, 1, 6), 3);
-        } catch(e) { }
+      equal(_.lastIndexOf(array, undefined, 8), -1);
+      equal(_.lastIndexOf(array, 1, 8), 3);
+    });
 
-        equal(actual, methodName == 'max' ? 1e6 : 0);
+    test('should work with a negative `fromIndex`', function() {
-      });
+      equal(_.lastIndexOf(array, 2, -3), 1);
+    });
+
+    test('should work with a negative `fromIndex` <= `-array.length`', function() {
+      equal(_.lastIndexOf(array, 1, -6), 0);
+      equal(_.lastIndexOf(array, 2, -8), -1);
+    });
+
+    test('should ignore non-number `fromIndex` values', function() {
+      equal(_.lastIndexOf([1, 2, 3], 3, '1'), 2);
+      equal(_.lastIndexOf([1, 2, 3], 3, true), 2);
     });
   }());
 
@@ -342,6 +529,17 @@
 
       deepEqual(args, ['C', 'B', 'b', object]);
     });
+
+    test('should treat array-like object with invalid `length` as a regular object', function() {
+      var args,
+          object = { 'a': 'A', 'length': -1 };
+
+      _.reduceRight(object, function() {
+        args || (args = slice.call(arguments));
+      });
+
+      deepEqual(args, [-1, 'A', 'a', object]);
+    });
   }());
 
   /*--------------------------------------------------------------------------*/
@@ -364,11 +562,36 @@
 
   (function() {
     test('supports the `thisArg` argument', function() {
-      var actual = _.sortBy([1, 2, 3, 4], function(num) {
+      var actual = _.sortBy([1, 2, 3], function(num) {
         return this.sin(num);
       }, Math);
 
-      deepEqual(actual, [4, 3, 1, 2]);
+      deepEqual(actual, [3, 1, 2]);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
+  QUnit.module('lodash.sortedIndex');
+
+  (function() {
+    test('supports the `thisArg` argument', function() {
+      var actual = _.sortedIndex([1, 2, 3], 4, function(num) {
+        return this.sin(num);
+      }, Math);
+
+      equal(actual, 0);
+    });
+
+    test('supports arrays with lengths larger than `Math.pow(2, 31) - 1`', function() {
+      var length = Math.pow(2, 32) - 1,
+          index = length - 1,
+          array = Array(length),
+          steps = 0;
+
+      array[index] = index;
+      _.sortedIndex(array, index, function() { steps++; });
+      equal(steps, 33);
     });
   }());
 
@@ -378,7 +601,7 @@
 
   (function() {
     test('supports recursive calls', function() {
-      var compiled = _.template('<%= a %><% a = _.template(c, object) %><%= a %>'),
+      var compiled = _.template('<%= a %><% a = _.template(c, obj) %><%= a %>'),
           data = { 'a': 'A', 'b': 'B', 'c': '<%= b %>' };
 
       equal(compiled(data), 'AB');
@@ -412,7 +635,7 @@
       while ((new Date - start) < limit) {
         throttled();
       }
-      equal(counter, 3);
+      ok(counter > 1);
     });
   }());
 
@@ -429,15 +652,34 @@
       deepEqual(_.toArray(array), [3, 2, 1]);
     });
 
-    test('should treat array-like-objects like arrays', function() {
+    test('should treat array-like objects like arrays', function() {
       var object = { '0': 'a', '1': 'b', '2': 'c', 'length': 3 };
       deepEqual(_.toArray(object), ['a', 'b', 'c']);
       deepEqual(_.toArray(args), [1, 2, 3]);
     });
+
+    test('should treat array-like object with invalid `length` as a regular object', function() {
+      var object = { 'length': -1 };
+      deepEqual(_.toArray(object), [-1]);
+    });
   }(1, 2, 3));
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('lodash.uniq');
+
+  (function() {
+    test('supports the `thisArg` argument', function() {
+      var actual = _.uniq([1, 2, 1.5, 3, 2.5], function(num) {
+        return this.floor(num);
+      }, Math);
+
+      deepEqual(actual, [1, 2, 3]);
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('lodash(...).shift');
 
   (function() {