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1. mapMaybe :: (a -> Maybe b) -> CharMap a -> CharMap b

   regex-tdfa	Data.IntMap.CharMap2

   No documentation available.

2. mapMaybeWithKey :: (Key -> a -> Maybe b) -> CharMap a -> CharMap b

   regex-tdfa	Data.IntMap.CharMap2

   No documentation available.

3. mapMaybe :: Enum key => (a -> Maybe b) -> EnumMap key a -> EnumMap key b

   regex-tdfa	Data.IntMap.EnumMap2

   No documentation available.

4. mapMaybeWithKey :: Enum key => (key -> a -> Maybe b) -> EnumMap key a -> EnumMap key b

   regex-tdfa	Data.IntMap.EnumMap2

   No documentation available.

5. mapM_ :: Monad m => (a -> m ()) -> FoldM m a ()

   foldl	Control.Foldl

   Converts an effectful function to a fold. Specialized version of sink.

6. mapMaybe :: Ord key => key -> T (Map key elem) (Maybe elem)

   data-accessor	Data.Accessor.Container

   Treats a finite map like an infinite map, where all undefined elements are Nothing and defined elements are Just.

7. mapMatrixWithIndex :: (Element a, Storable b) => ((Int, Int) -> a -> b) -> Matrix a -> Matrix b

   hmatrix	Numeric.LinearAlgebra.Devel

   >>> mapMatrixWithIndex (\(i,j) v -> 100*v + 10*fromIntegral i + fromIntegral j) (ident 3:: Matrix Double)
   (3><3)
   [ 100.0,   1.0,   2.0
   ,  10.0, 111.0,  12.0
   ,  20.0,  21.0, 122.0 ]
   

8. mapMatrixWithIndexM :: (Element a, Storable b, Monad m) => ((Int, Int) -> a -> m b) -> Matrix a -> m (Matrix b)

   hmatrix	Numeric.LinearAlgebra.Devel

   >>> mapMatrixWithIndexM (\(i,j) v -> Just $ 100*v + 10*fromIntegral i + fromIntegral j) (ident 3:: Matrix Double)
   Just (3><3)
   [ 100.0,   1.0,   2.0
   ,  10.0, 111.0,  12.0
   ,  20.0,  21.0, 122.0 ]
   

9. mapMatrixWithIndexM_ :: (Element a, Num a, Monad m) => ((Int, Int) -> a -> m ()) -> Matrix a -> m ()

   hmatrix	Numeric.LinearAlgebra.Devel

   >>> mapMatrixWithIndexM_ (\(i,j) v -> printf "m[%d,%d] = %.f\n" i j v :: IO()) ((2><3)[1 :: Double ..])
   m[0,0] = 1
   m[0,1] = 2
   m[0,2] = 3
   m[1,0] = 4
   m[1,1] = 5
   m[1,2] = 6
   

10. mapM_ :: (a -> IO b) -> InputStream a -> IO (InputStream a)

    io-streams	System.IO.Streams.Combinators

    Maps a side effect over an InputStream. mapM_ f s produces a new input stream that passes all output from s through the side-effecting IO action f. Example:

    ghci> Streams.fromList [1,2,3] >>=
    Streams.mapM_ (putStrLn . show . (*2)) >>=
    Streams.toList
    2
    4
    6
    [1,2,3]
    

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