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mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)numeric-prelude NumericPrelude Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)numeric-prelude NumericPrelude.Base Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)numhask NumHask.Prelude Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.-
ListLike Data.ListLike A map in monad space. Same as sequence . map See also rigidMapM
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ListLike Data.ListLike.Base A map in monad space. Same as sequence . map See also rigidMapM
mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)basic-prelude BasicPrelude Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)classy-prelude ClassyPrelude Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.mapM :: Monad m => (a -> m b) -> Stream m a x -> Stream m b xghc-lib-parser GHC.Data.Stream Apply a monadic operation to each element of a Stream, lazily
mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)ghc-lib-parser GHC.Prelude.Basic Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.
Examples
mapM is literally a traverse with a type signature restricted to Monad. Its implementation may be more efficient due to additional power of Monad.-
contiguous Data.Primitive.Contiguous Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. for a version that ignores the results see mapM_.