Custom Iterator

Iterator.js

Object.defineProperty(myObject, Symbol.iterator, {
    enumerable: false,
    writable: false,
    configurable: true,
    value: function () {
        var obj = this;
        var idx = 0;
        var ks = Object.keys(obj);
        return {
            next: function () {
                return {
                    value: obj[ks[idx++]],
                    done: (idx > ks.length)
                };
            }
        };
    }
});