Lost in TechnopolisThis article assumes familiarity with monads and monad transformers. If you’ve never had an occasion to use lift yet, you may want to come back to it later. The Problem What is the problem that monad-control aims to solve? To answer that, let’s back up a bit. We know that a monad represents some kind of “computational context”. The question is, can we separate this context from the monad, and reco
モナド変換子
