Implement ES6 Array.of()

test/mjsunit/es6/array-of-generic-1.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Based on: https://hg.mozilla.org/mozilla-central/file/d0c3168c3c47/js/src/jit-test/tests/collections/Array-of-generic-1.js
+
+// Flags: --harmony-arrays
+
+
+// Array.of can be transplanted to other classes.
+
+var hits = 0;
+function Bag() {
+    hits++;
+}
+Bag.of = Array.of;
+
+hits = 0;
+var actual = Bag.of("zero", "one");
+assertEquals(hits, 1);
+
+hits = 0;
+var expected = new Bag;
+expected[0] = "zero";
+expected[1] = "one";
+expected.length = 2;
+assertEquals(areSame(actual, expected), true);
+
+hits = 0;
+actual = Array.of.call(Bag, "zero", "one");
+assertEquals(hits, 1);
+assertEquals(areSame(actual, expected), true);
+
+function areSame(object, array) {
+    var result = object.length == array.length;
+    for (var i = 0; i < object.length; i++) {
+        result = result && object[i] == array[i];
+    }
+    return result;
+}