fix(isArrayLike) Correctly detect arrayLike items

Change the implementation of isArrayLike to use one heavily based on the
implementation in jQuery in order to correctly detect array-like
objects, that way functionality like ngRepeat works as expected.

src/Angular.js

@@ -80,19 +80,19 @@ var /** holds major version number for IE or NaN for real browsers */
  * @return {boolean} Returns true if `obj` is an array or array-like object (NodeList, Arguments, ...)
  */
 function isArrayLike(obj) {
-  if (!obj || (typeof obj.length !== 'number')) return false;
-
-  // We have on object which has length property. Should we treat it as array?
-  if (typeof obj.hasOwnProperty != 'function' &&
-      typeof obj.constructor != 'function') {
-    // This is here for IE8: it is a bogus object treat it as array;
-    return true;
-  } else  {
-    return obj instanceof JQLite ||                      // JQLite
-           (jQuery && obj instanceof jQuery) ||          // jQuery
-           toString.call(obj) !== '[object Object]' ||   // some browser native object
-           typeof obj.callee === 'function';              // arguments (on IE8 looks like regular obj)
+  if (obj == null || isWindow(obj)) {
+    return false;
   }
+  
+  var length = obj.length;
+
+  if (obj.nodeType === 1 && length) {
+    return true;
+  }
+
+  return isArray(obj) || !isFunction(obj) && (
+    length === 0 || typeof length === "number" && length > 0 && (length - 1) in obj
+  );
 }
 
 /**

test/ng/directive/ngRepeatSpec.js

@@ -77,7 +77,27 @@ describe('ngRepeat', function() {
     expect(element.find('li').length).toEqual(3);
     expect(element.text()).toEqual('x;y;x;');
   });
+  
+  it('should iterate over an array-like class', function() {
+    function Collection() {}
+    Collection.prototype = new Array();
+    Collection.prototype.length = 0;
 
+    var collection = new Collection();
+    collection.push({ name: "x" });
+    collection.push({ name: "y" });
+    collection.push({ name: "z" });
+
+    element = $compile(
+      '<ul>' +
+        '<li ng-repeat="item in items">{{item.name}};</li>' +
+      '</ul>')(scope);
+
+    scope.items = collection;
+    scope.$digest();
+    expect(element.find('li').length).toEqual(3);
+    expect(element.text()).toEqual('x;y;z;');
+  });
 
   it('should iterate over on object/map', function() {
     element = $compile(