nw

  // Add a handy super call for all objects
  MyBaseClass.prototype.super = function () {
    var parent = this.__proto__.__proto__;
    var caller = arguments.callee.caller;
    var fn;
    if (caller.prototype === this.__proto__) {
      return parent.constructor.apply(this, arguments);
    } else {
      // This is probably quite slow, but it doesn't seem to affect
      // performance too much in real tests.

nw

	Number.implement({
		parsePermissions : function(){
			var types = {r : 4, w : 2, x : 1 }, levels = {u : 1, g : 8, o : 64 }, perms = {};
			for(l in levels){
				for(t in types) perms[l+t] = !!(this & (levels[l] * types[t]));
			}
			return perms;
		}
	});