day 10 

On day 9 we reviewed monadic functions flatten, filterM, and the implementation of foldM. Next we made a safe RPN calculator using foldM, looked at Kleisli composition, implemented our own monad Prob, and thought about fractals.

Since Cats does not provide Zippers, we are now done with Learn You a Haskell for Great Good, and we need to find our own topic.