Haskle

Haskle is an online game with an extremely intriguing word-guessing theme for everyone. The game's objective is to guess a function from the prelude. In each round, you make a guess at a function from its prelude or from its jumbled type. Emojis initially replace each type element (binding, type variable, and type). Interestingly, right? Join Haskle today!

How to play

The challenge involves moving and following instructions with the mouse. Once the type is fully revealed, new guesses reveal the function name following the same mechanism: characters appearing in both the guess name and the answer name are revealed.

We have taken the signatures almost verbatim from GHCI, with the following differences:

• Brackets ([]) are replaced by List;
• Tuple and Tuple3 substitute the tuples ((,) and (,)).
• Unit; replaces the function type (()).
• Typeclass methods have their typecasts in a separate set of constraints. For example, traverse has Traversable t => Applicative f => (a -> f b) -> t a -> f (t b) instead of (Traversable t, Applicative f) =>...

Emojis replace each character in the function name. Use the supporting hints to quickly find the correct answer. Good luck!

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