bnb.js

function BadNewsBears() {
  var a = 0;
  Object.defineProperty(this, 'inc', 
                        {get : function () { return a++; },
                         enumerable : true});
  Object.defineProperty(this, 'wtf',
                        {get : function () {
                           var b = (this.inc, this.inc, this.inc);
                           return b;
                         },
                         enumerable : true});
}

var lol = new BadNewsBears();
lol.wtf // --> ?