<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.

A last-class function is a function that cannot be passed as an argument, accept a function as an argument, be returned by a function, return a function, set to a variable other than its initial name, or be called. It can, however, be pointed at, derisively.