Perl is full of strange grammatical rules and even stranger conventions that it's one of the few languages I learned 15 years ago that I can't just pick up and

Perl is full of strange grammatical rules and even stranger conventions that it's one of the few languages I learned 15 years ago that I can't just pick up and use. I've forgotten basically everything I ever knew about it and yet other languages from the time period, even some odd ones, I can still grasp enough to restart the process.