Is there any kind of hash code function in JavaScript?

Question

Basically, I\'m trying to create an object of unique objects, a set. I had the brilliant idea of just using a JavaScript object with objects for the property names. Such as,

Answer 1

The solution I chose is similar to Daniel's, but rather than use an object factory and override the toString, I explicitly add the hash to the object when it is first requested through a getHashCode function. A little messy, but better for my needs :)

Function.prototype.getHashCode = (function(id) {
    return function() {
        if (!this.hashCode) {
            this.hashCode = '';
        }
        return this.hashCode;
    }
}(0));