2016-02-04 Reader monad transformers in string diagrams 圏論 Monad Kleisli Haskell (図にしてみれば怖くない・・・かも) Reader monad transformers Reader monads 上図の太枠を取り除いたもの。 参考文献 transformers: Concrete functor and monad transformers | Hackage scala - Is it just a coincidence that Kleisli, ReaderT, and Reader are the same in Scalaz - Stack Overflow