<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

shebang_args_or_input is similar to print_args_or_input, but for other scripting languages like perl or python. E.g. if you have a python script that pipes stdin, replace the usual shebang line by "#!/hackenv/bin/shebang_args_or_input python".