Simplify _.size.

Former-commit-id: a7d3338cbd5784ec6b9b6a25e18acd9507f4b21c

README.md

@@ -186,7 +186,7 @@ require({
  * `_.forEach` should be chainable [[#142](https://github.com/documentcloud/underscore/issues/142), [test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L521-524)]
  * `_.forEach` should allow exiting iteration early [[#211](https://github.com/documentcloud/underscore/issues/211), [test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L616-635)]
  * `_.isElement` should use strict equality for its duck type check [[test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L731-740)]
- * `_.isEmpty` and `_.size` should support jQuery/MooTools DOM query collections [[#690](https://github.com/documentcloud/underscore/pull/690), [test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L767-772)]
+ * `_.isEmpty` should support jQuery/MooTools DOM query collections [[#690](https://github.com/documentcloud/underscore/pull/690), [test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L767-772)]
  * `_.isEqual` should return `true` for like-objects from different documents [[test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L808-828)]
  * `_.isObject` should avoid V8 bug [#2291](http://code.google.com/p/v8/issues/detail?id=2291) [[#605](https://github.com/documentcloud/underscore/issues/605), [test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L836-848)]
  * `_.isNaN(new Number(NaN))` should return `true` [[test](https://github.com/bestiejs/lodash/blob/v0.6.1/test/test.js#L856-858)]

build.js

@@ -233,7 +233,7 @@
     'rest': [],
     'result': ['isFunction'],
     'shuffle': [],
-    'size': ['isArguments', 'isFunction', 'keys'],
+    'size': ['keys'],
     'some': ['identity'],
     'sortBy': [],
     'sortedIndex': ['bind'],
@@ -610,7 +610,7 @@
    */
   function removeNoArgsClass(source) {
     return removeVar(source, 'noArgsClass')
-      // remove `noArgsClass` from `_.clone`, `_.isEqual`, and `_.size`
+      // remove `noArgsClass` from `_.clone` and `_.isEqual`
       .replace(/ *\|\| *\(noArgsClass *&&[^)]+?\)\)/g, '')
       // remove `noArgsClass` from `_.isEqual`
       .replace(/if *\(noArgsClass[^}]+?}\n/, '');
@@ -1111,7 +1111,7 @@
   if (isRemoved(source, 'clone', 'merge')) {
     source = removeFunction(source, 'isPlainObject');
   }
-  if (isRemoved(source, 'clone', 'isArguments', 'isEmpty', 'isEqual', 'size')) {
+  if (isRemoved(source, 'clone', 'isArguments', 'isEmpty', 'isEqual')) {
     source = removeNoArgsClass(source);
   }
   if (isRemoved(source, 'isEqual', 'isPlainObject')) {

doc/README.md

@@ -1912,7 +1912,7 @@ initialize();
 Creates a two dimensional array of the given object's key-value pairs, i.e. `[[key1, value1], [key2, value2]]`.
 
 #### Arguments
-1. `object` *(Object)*: The object to inspect..
+1. `object` *(Object)*: The object to inspect.
 
 #### Returns
 *(Array)*: Returns new array of key-value pairs.
@@ -2025,8 +2025,8 @@ _.pluck(stooges, 'name');
 Produces a random number between `min` and `max` *(inclusive)*. If only one argument is passed, a number between `0` and the given number will be returned. If no arguments are passed `_.random` will act as `Math.random`.
 
 #### Arguments
-1. `min` *(Number)*: The minimum possible value
-2. `max` *(Number)*: The maximum possible value
+1. `min` *(Number)*: The minimum possible value.
+2. `max` *(Number)*: The maximum possible value.
 
 #### Returns
 *(Number)*: Returns the random number.

lodash.js

@@ -1920,45 +1920,6 @@
     'bottom': '}'
   });
 
-  /**
-   * Gets the size of `value` by returning `value.length` if `value` is an
-   * array, string, or `arguments` object. If `value` is an object, size is
-   * determined by returning the number of own enumerable properties it has.
-   *
-   * @static
-   * @memberOf _
-   * @category Objects
-   * @param {Array|Object|String} value The value to inspect.
-   * @returns {Number} Returns `value.length` or number of own enumerable properties.
-   * @example
-   *
-   * _.size([1, 2]);
-   * // => 2
-   *
-   * _.size({ 'one': 1, 'two': 2, 'three': 3 });
-   * // => 3
-   *
-   * _.size('curly');
-   * // => 5
-   */
-  function size(value) {
-    if (!value) {
-      return 0;
-    }
-    var className = toString.call(value),
-        length = value.length;
-
-    // return `value.length` for `arguments` objects, arrays, strings, and DOM
-    // query collections of libraries like jQuery and MooTools
-    // http://code.google.com/p/fbug/source/browse/branches/firebug1.9/content/firebug/chrome/reps.js?r=12614#653
-    // http://trac.webkit.org/browser/trunk/Source/WebCore/inspector/InjectedScriptSource.js?rev=125186#L609
-    if (arrayLikeClasses[className] || (noArgsClass && isArguments(value)) ||
-        (className == objectClass && length > -1 && length === length >>> 0 && isFunction(value.splice))) {
-      return length;
-    }
-    return keys(value).length;
-  }
-
   /**
    * Creates an array composed of the own enumerable property values of `object`.
    *
@@ -2365,6 +2326,34 @@
     'inLoop': '!' + filterIteratorOptions.inLoop
   });
 
+  /**
+   * Gets the size of the `collection` by returning `collection.length` for arrays
+   * and array-like objects or the number of own enumerable properties for objects.
+   *
+   * @static
+   * @memberOf _
+   * @category Collections
+   * @param {Array|Object|String} collection The collection to inspect.
+   * @returns {Number} Returns `collection.length` or number of own enumerable properties.
+   * @example
+   *
+   * _.size([1, 2]);
+   * // => 2
+   *
+   * _.size({ 'one': 1, 'two': 2, 'three': 3 });
+   * // => 3
+   *
+   * _.size('curly');
+   * // => 5
+   */
+  function size(collection) {
+    if (!collection) {
+      return 0;
+    }
+    var length = collection.length;
+    return length > -1 && length === length >>> 0 ? length : keys(collection).length;
+  }
+
   /**
    * Checks if the `callback` returns a truthy value for **any** element of a
    * `collection`. The function returns as soon as it finds passing value, and
@@ -3833,8 +3822,8 @@
    * @static
    * @memberOf _
    * @category Utilities
-   * @param {Number} min The minimum possible value
-   * @param {Number} max The maximum possible value
+   * @param {Number} min The minimum possible value.
+   * @param {Number} max The maximum possible value.
    * @returns {Number} Returns the random number.
    * @example
    *

lodash.min.js

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test/test.js

@@ -1304,10 +1304,6 @@
       })
     });
 
-    test('should work with an object that has a `length` property', function() {
-      equal(_.size({ 'length': 3 }), 1);
-    });
-
     test('should work with jQuery/MooTools DOM query collections', function() {
       function Foo(elements) { Array.prototype.push.apply(this, elements); }
       Foo.prototype = { 'length': 0, 'splice': Array.prototype.splice };