Haskle is a little wordle-like game, where the goal is to guess a function from its (obfuscated) type. After each try, the type is partially revealed, and when the type is revealed, the name of the function starts to reveal itself as well.

By default, the set of possible answer is the haskell prelude, but you can choose from other sets (for now, lens operators, and just traverse). As a matter of fact, adding a new set is a great way to contribute to haskle!

Haskle is an elm application. I’ve tried to keep it as simple as possible, and I mostly work on it during my breaks, so code quality is… what it is. The nice thing about haskle is that it is working purely client-side, so it is relatively easy to hack on it locally.

The only dependency is elm-0.19, you should be able to get it with nix-shell (a shell.nix file is present).

make && xdg-open public/index.html

The core part of a function set is a list of signatures, represented as strings. The name must be separated from the type with ::. In order to make the game more interesting, types like [a], (a,b), and () have to be replaced by List a, Tuple a b and Unit.

Additionally, you’ll have to provide a bit of extra information (like how to generate links to documentation pages).