Implement map and mapM from Pipes.Prelude. They have the following types:
map :: Monad m => (a -> b) -> Pipe a b m r
mapM :: Monad m => (a -> m b) -> Pipe a b m r
You can write these definitions using only the functions we have seen already: yield, await, and lift.
Sign up for access to the full page, plus the complete archive and all the latest content.