Reference

# Reference Objects are **never copied**. They are passed around by reference. ~~~ // Imagine I had a pizza var myPizza = {slices: 5}; // And I shared it with You var yourPizza = myPizza; // I eat another slice myPizza.slices = myPizza.slices - 1; var numberOfSlicesLeft = yourPizza.slices; // Now We have 4 slices because myPizza and yourPizza // reference to the same pizza object. var a = {}, b = {}, c = {}; // a, b, and c each refer to a // different empty object a = b = c = {}; // a, b, and c all refer to // the same empty object ~~~