for-each.js 193 Bytes
"use strict";

module.exports = function (t, a) {
	var o = { raz: 1, dwa: 2, trzy: 3 }, o2 = {};
	a(t(o, function (value, name) { o2[name] = value; }), undefined, "Return");
	a.deep(o2, o);
};