You deserve a medal. I had no problems with this either, but you could have just said "it had nothing to do with sparse arrays" without bragging. I think @ adfsdfadsf was a little pissed, and I don't name call but I kind of agree. Your ego is getting away with you and for newcomers, it can intimidate them. Maybe you're the class bully, or some affluent person, I don't know your circumstances, but you are not being helpful to learners with your comment. I don't think your comment was constructive. We're all trying to learn here, so maybe in future comments lose the bravado, and concentrate on substance. All comments here should be content related, not a forum to brag about how quickly you performed a task.