prototype based inheritance in js

prototypeBased.js

/**
 * The hack es5 object.create() gives us. We make a shallow copy of the object
 * passed in and returned the new object with prototype linked to the passed in
 * object
 * 1. still we have the shared reference problems
 */
//simple version of object.create()
function objectCreate(obj) {
  function F() {}
  F.prototype = obj;
  return new F();
}

var person = {
  name: 'Tom',
  friends: ['Daday', 'Mommy', 'Didi'],
};

var anotherPerson = object(person);
anotherPerson.name = 'Greg';
anotherPerson.friends.push('Rob');

var yetAnotherPerson = object(person);
yetAnotherPerson.name = 'Linda';
yetAnotherPerson.friends.push('Barbie');

alert(person.friends); //""Daday", "Mommy", "Didi","Rob", barbie