just uploaded to https://fpilluminated.com: Folding Cheat Sheet #4 🚀🙂Direct link: https://fpilluminated.com/deck/212 - For functions that can be defined both as an instance of a right fold and as an instance of a left fold, one may be more efficient than the other. #scala #haskell #fold #foldl #foldr #foldLeft #foldRight