:: (Foldable t, Monad m) => (a -> m b) -> t a -> m () package:yesod-paginator

mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m ()

Map each element of a structure to a monadic action, evaluate these actions from left to right, and ignore the results. For a version that doesn't ignore the results see mapM. As of base 4.8.0.0, mapM_ is just traverse_, specialized to Monad.

forM_ :: (Foldable t, Monad m) => t a -> (a -> m b) -> m ()

yesod-paginator Yesod.Paginator.Prelude

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore the results see forM. As of base 4.8.0.0, forM_ is just for_, specialized to Monad.