!function (factory) {
  factory(window['Hi'] = {
    __a: function () {
      console.log('Hi.__a');
    },
    __b: function () {
      console.log('Hi.__b');
    },
    __c: function () {
      console.log('Hi.__c');
    }
  });
}(function (Hi) {
  if (typeof Hi === undefined) {
    Hi = {};
  }
  Object.defineProperty(Hi, 'appName', {
    get: function () {
      return 'this is app name.';
    }
  })
});
console.log(Hi.appName);//this is app name.
Hi.__b();//Hi.__b

!function (factory) { }();

var myObj = myObj || {};
(function (myObj) {
  myObj.__a = function () {
    console.log('myObj.__a');
  };
  myObj.name = 'this is myObj.name';
})(myObj);
console.log(myObj.name);//this is myObj.name
myObj.__a();//myObj.__a