that is what I tried and was having problems with
in your example a3 = 2,3,0, and I only need to return the values that are in the first array and not in the second array etc....
a1:Array = new Array(2,1,3,0);
a2:Array = new Array(0,2,3);
so I need a2:Array = new Array(1); - as "1" is tha value that is in the first array but not in the second.