Javascript Array iterate(func, args)

Array.prototype.iterate = function(func, args) {
 if (!(args instanceof Array)) {
  args = [args];/*from   w  w w.  ja  v  a 2 s.co  m*/
 }
 var l = this.length, a = [];
 for (var i=0; i<l; i++) {
  a.push(func.apply(this[i], args));
 }
 return a;
}