How to troll programmers

theory vs pragmatism
vi vs emacs
x language vs y language
-works well with these (x,y) pairs
(java, c++) (lisp dialect, c++/java) (c, c++) (python, java) (perl, c/++) (perl,php)
CLI vs IDE
nix vs windows
microsoft vs linux
garbage collection vs managed memory

Implement streams in Haskell

Mac OS vs. Linux (same OS lol)