bergus

/*
* I saw this thread: http://stackoverflow.com/questions/840781/easiest-way-to-find-duplicate-values-in-a-javascript-array
* The solutions from gist:1305056 were elegant, but wrong. So here's mine:
*/
Array.prototype.unique = function(test) {
/* returns a new, sorted Array without duplicates */
	if (!Array.isArray(this))
		throw new TypeError("Array.prototype.unique must be called on an Array");
	return this.slice(0).sort().filter( typeof test == "function"
		? function(v, i, a) { return !i || !test(v, a[i-1]); }