IsInIntArray MEL

global proc int IsInIntArray(int $IntArr[], int $IntNum) {
	for ($x=0;$x<size($IntArr);$x++) {
		if ($IntArr[$x] == $IntNum) {
			return 1;
		}
	}
	return 0;
} 

More information on strings and arrays, read pages 28-37 in YSYT.