JS: array push element ID

[dougal85]

Is there a way that i can determine what ID a new element in an array will be given when using the array.push() method in JavaScript.

I had considered doing (array.length - 1), however, if say you have 3 elements and element 1 is deleted and a new one is added... you then end up with an id of 3 and thats already another one.

[dougal85]

I done allot of hunting around in the javascript api's on mozillas website without any luck. so i figured the method wasnt already there.

so i decided to add it

Array.prototype.pushId = function(){

	var r = undefined;
	var x = 0;

	while(!r){

		if(!this[x]){

			r = x;

		}

		x++;

	}

	return r;

}

i'm having problems with, it tho, any ideas?