[novikov]

http://docs.sencha.com/extjs/5.1/5.1...ay-method-each

про нативный Array нужно поискать...

forEach: ('forEach' in arrayPrototype) ? function(array, fn, scope) {
                return array.forEach(fn, scope);
            } : function(array, fn, scope) {
                for (var i = 0,
                    ln = array.length; i < ln; i++) {
                    fn.call(scope, array[i], i, array);
                }
            },