I failed.
Nice tip. Speed is key for me too.

Hi, first off, glad that you are so curious. But, please don't mention coding techniques for a solution without using the spoiler tag. (I have added the tag)

Second, if you enjoy the process of learning and developing, do not quit. It takes time to absorb these skills, but it never ends! I does get better if you put the time into it and study other people's code, as you have here.