[flexcoders] What is the best way to compare two arrays element by element ignoring the order?

[Sergey Kovalyov]

What is the best way to compare two arrays element by element ignoring the
order? My solution:

var differs : Boolean =
 (a.length != b.length) ||
 a.some(
  function(item : Object, index : int, array : Array) : Boolean {
   return (b.indexOf(item) == -1);
  });

May be the better solution exists?