gistfile1.js

"use strict";

var _defineProperty = function (obj, key, value) { return Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); };

var a = "k",
    b = (function () {
  var _b = {};

  _defineProperty(_b, a, "foo");

  _defineProperty(_b, "k", "bar");

  return _b;
})();