Comment by kccqzy
2 days ago
Is it really easier to use for_? It forces you to think about effects rather than pure data. So you end up packaging data into effects through State or similar monads. So is it really easier if you force people to use Monad (well technically Applicative)?
Yes, absolutely, I would say for almost every programmer, certainly for me. "Scrap your iteration combinators" goes into more detail. foldl' is a bit too simple to replace with for_, but for almost every other use case, yes, I do use for_. In fact, I find it remarkably liberating compared to the "iteration combinator" conventional wisdom that has been passed down from Haskeller to Haskeller over the years.
I don't feel that monads are particularly complicated. I have several non-Haskellers programming in Haskell at work, using monads. They just think they're writing a sequence of statements. I feel that mixing monads is complicated, which is why I recommend an IO-wrapper effect system (Bluefin or effectful), so that you don't need to mix.
https://h2.jaguarpaw.co.uk/posts/scrap-your-iteration-combin...