Hey #haskell folks, can you guess what I'm doing?
@smt @ino It is not a Haskell class, it is a class about category theory.
You can find it here in video: https://www.youtube.com/watch?v=I8LbkfSSR58&list=PLbgaMIhjbmEnaH_LTkxLI7FMa2HsnawM_
Or here as text (I personally prefer reading over viewing a video as you tend to be quite passive): https://bartoszmilewski.com/2014/10/28/category-theory-for-programmers-the-preface/