Current object property as value in same object different property

Question

Sorry for such a random title, but have no idea how to explain it better. And therefore, no idea if this is a duplicate question or not.

So, when declaring a new ob

Answer 1

var myObject = {
    super : 1,
    mega : 5,
    uber : 100
};
myObject.giga = myObject.super + myObject.mega + myObject.uber;