Unique Array Comparison

function uniqueCompare(arr:Array, compare:Function):void {
	var leng:int = arr.length;
	for (var i:int = 0; i<leng; i++){
		for (var j:int = i + 1; j<leng; j++){
			compare(arr[i], arr[j]);
		}
	}
}

var numbers:Array = [1, 2, 3, 4, 5];

uniqueCompare(numbers, compareCallback);

function compareCallback(a:*, b:*):void {
	trace("compare " + a + " to " + b);
}

/*
outputs:
compare 1 to 2
compare 1 to 3
compare 1 to 4
compare 1 to 5
compare 2 to 3
compare 2 to 4
compare 2 to 5
compare 3 to 4
compare 3 to 5
compare 4 to 5
*/

This snippet shows a function called uniqueCompare() that compares all elements in an array to all other elements in an array without repeating a comparison.