I wish the `transformers` library had a RWT (ReaderT + StateT) monad transformer. WriterT is an anti-pattern.
@GabrielG439 why is it an anti-pattern?
2014-04-09 12:22:13 via Echofon to @GabrielG439
@etorreborre It always leaks space (even if you don't use it). You also get no results until the end. See here: URL
と、pipeとか作ってるHaskellの有名な人が言ってました。そうなんですか？
