Extensional capabilities and deriving combinators

🎯 Learning different effect systems by example

mtl vs free monads

Yesod Transformer Library - MTL for site stacks

Floyd-Warshall algorithm, matrix manipulation and another good example of using mtl

Apply mtl, apply classy prism

Backend for a web chat application using WebSockets and WAI in Haskell

REST service in container with Haskell-servant, PostgreSql-simple, PostgreSql-simple-migration

Overloaded variants from the errors library

Simple example of a monad transformer