JavaScript: forEach support for older browsers

forEach.js

/*
 * forEach support for older browsers.
 * Source: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/forEach
 */
(function() {
    "use strict";
    if (!Array.prototype.forEach) {
         Array.prototype.forEach = function(fn, scope) {
             for(var i = 0, len = this.length; i < len; ++i) {
                 fn.call(scope || this, this[i], i, this);
             }
         }
     }
 }());