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Within LTS Haskell 24.41 (ghc-9.10.3)
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mapM :: MonadUnliftIO m => (a -> m b) -> InputStream a -> m (InputStream b)unliftio-streams UnliftIO.Streams.Combinators No documentation available.
mapBufferM :: (a -> IO b) -> Buffer a -> IO (Vector b)vector-buffer Data.Vector.Buffer monadic map over a buffer
mapBufferM_ :: (a -> IO b) -> Buffer a -> IO ()vector-buffer Data.Vector.Buffer monadic map over a buffer
mapBufferM :: (Prim a, Prim b) => (a -> IO b) -> Buffer a -> IO (Vector b)vector-buffer Data.Vector.Primitive.Buffer monadic map over a buffer
mapBufferM_ :: Prim a => (a -> IO b) -> Buffer a -> IO ()vector-buffer Data.Vector.Primitive.Buffer monadic map over a buffer
mapBufferM :: (Storable a, Storable b) => (a -> IO b) -> Buffer a -> IO (Vector b)vector-buffer Data.Vector.Storable.Buffer monadic map over a buffer
mapBufferM_ :: Storable a => (a -> IO b) -> Buffer a -> IO ()vector-buffer Data.Vector.Storable.Buffer monadic map over a buffer
mapBufferM :: (Unbox a, Unbox b) => (a -> IO b) -> Buffer a -> IO (Vector b)vector-buffer Data.Vector.Unboxed.Buffer monadic map over a buffer
mapBufferM_ :: Unbox a => (a -> IO b) -> Buffer a -> IO ()vector-buffer Data.Vector.Unboxed.Buffer monadic map over a buffer
mapAccumL :: Traversable t => (s -> a -> (s, b)) -> s -> t a -> (s, t b)verset Verset The mapAccumL function behaves like a combination of fmap and foldl; it applies a function to each element of a structure, passing an accumulating parameter from left to right, and returning a final value of this accumulator together with the new structure.
Examples
Basic usage:>>> mapAccumL (\a b -> (a + b, a)) 0 [1..10] (55,[0,1,3,6,10,15,21,28,36,45])
>>> mapAccumL (\a b -> (a <> show b, a)) "0" [1..5] ("012345",["0","01","012","0123","01234"])