removes duplicaates from an array. * modifies original array

Array.prototype.unique.js

/*	Array.prototype.unique	*/
;(function() {	//	removes duplicaates from an array. * modifies original array
	var name = "unique";
	function unique() {
		var x = [];
		for (var c = {}, d = [], a = 0; a < this.length; a++) {
			var b = this[a].constructor.name, b = b + (/num|str|regex|bool/i.test(b) ? this[a] : JSON.stringify(this[a]));
			if (b in c) x.push(a);
			b in c || d.push(this[a]);
			c[b] = 1;
		}
		if (x) for (var i = (x.length-1); i >= 0; i--) this.splice(x[i], 1);
		return this;
	}
	Object['defineProperty'] && !Array.prototype.hasOwnProperty(name)
		? Object.defineProperty(Array.prototype, name, { value: unique }) : Array.prototype[name] = unique;
})();