text: /**
   * 2017-9-16 sunzhiyue
   */
  var o = Object.create(null, {
      foo: {
          enumerable: false,
          value: 'hello'
      },
      bar:{
          enumerable: true,
          value: 'yi'
      }
  });
  var obj = {};
  Object.assign(obj, o);
  console.log(o, obj);
  console.log(o.foo, o.bar);