I'm one of the QandAEditors. Though I am, sadly, not able to spend all that much time around the Monastery anymore. It looks like you got your links to appear as you wanted. If I've missed a recent debate, my apologies for responding at face value. I might have sent the OP to How can I find the union/difference/intersection of two arrays? as well. In my almost-humble opinion, this question is better suited for SoPW since the issue was errors in the code... Wanna help keep Categorized Questions and Answers up-to-date?