ghci is my friend. :i and :t go a long way as a backup for my memory. If Perl (or APL, another language criticized for having a vast array, you should pardon th

ghci is my friend. :i and :t go a long way as a backup for my memory. If Perl (or APL, another language criticized for having a vast array, you should pardon the expression, of unfamiliar operators) has something similar, I've not heard of it.