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Within LTS Haskell 24.4 (ghc-9.10.2)

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  1. mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)

    base 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.

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

    base Prelude

    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. mapM_ is just like traverse_, but specialised to monadic actions.

  3. mappend :: Monoid a => a -> a -> a

    base Prelude

    An associative operation NOTE: This method is redundant and has the default implementation mappend = (<>) since base-4.11.0.0. Should it be implemented manually, since mappend is a synonym for (<>), it is expected that the two functions are defined the same way. In a future GHC release mappend will be removed from Monoid.

  4. mapping :: forall (f :: Type -> Type) (g :: Type -> Type) s t a b . (Functor f, Functor g) => AnIso s t a b -> Iso (f s) (g t) (f a) (g b)

    gogol-core Gogol.Prelude

    This can be used to lift any Iso into an arbitrary Functor.

  5. mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)

    hedgehog Hedgehog.Internal.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.

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

    hedgehog Hedgehog.Internal.Prelude

    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. mapM_ is just like traverse_, but specialised to monadic actions.

  7. mappend :: Monoid a => a -> a -> a

    hedgehog Hedgehog.Internal.Prelude

    An associative operation NOTE: This method is redundant and has the default implementation mappend = (<>) since base-4.11.0.0. Should it be implemented manually, since mappend is a synonym for (<>), it is expected that the two functions are defined the same way. In a future GHC release mappend will be removed from Monoid.

  8. mapM :: (Traversable t, Monad m) => (a -> m b) -> t a -> m (t b)

    ghc GHC.Prelude.Basic

    No documentation available.

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

    ghc GHC.Prelude.Basic

    No documentation available.

  10. mappend :: Monoid a => a -> a -> a

    ghc GHC.Prelude.Basic

    No documentation available.

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