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1. mappedFileGetBytes :: (HasCallStack, MonadIO m) => MappedFile -> m Bytes

   gi-glib	GI.GLib.Structs.MappedFile

   Creates a new Bytes which references the data mapped from file. The mapped contents of the file must not be modified after creating this bytes object, because a Bytes should be immutable. Since: 2.34

2. mappedFileGetContents :: (HasCallStack, MonadIO m) => MappedFile -> m Text

   gi-glib	GI.GLib.Structs.MappedFile

   Returns the contents of a MappedFile. Note that the contents may not be zero-terminated, even if the MappedFile is backed by a text file. If the file is empty then Nothing is returned. Since: 2.8

3. mappedFileGetLength :: (HasCallStack, MonadIO m) => MappedFile -> m CSize

   gi-glib	GI.GLib.Structs.MappedFile

   Returns the length of the contents of a MappedFile. Since: 2.8

4. mappedFileNew :: (HasCallStack, MonadIO m) => [Char] -> Bool -> m MappedFile

   gi-glib	GI.GLib.Structs.MappedFile

   Maps a file into memory. On UNIX, this is using the mmap() function. If writable is True, the mapped buffer may be modified, otherwise it is an error to modify the mapped buffer. Modifications to the buffer are not visible to other processes mapping the same file, and are not written back to the file. Note that modifications of the underlying file might affect the contents of the MappedFile. Therefore, mapping should only be used if the file will not be modified, or if all modifications of the file are done atomically (e.g. using fileSetContents). If filename is the name of an empty, regular file, the function will successfully return an empty MappedFile. In other cases of size 0 (e.g. device files such as /dev/null), error will be set to the FileError value FileErrorInval. Since: 2.8

5. mappedFileNewFromFd :: (HasCallStack, MonadIO m) => Int32 -> Bool -> m MappedFile

   gi-glib	GI.GLib.Structs.MappedFile

   Maps a file into memory. On UNIX, this is using the mmap() function. If writable is True, the mapped buffer may be modified, otherwise it is an error to modify the mapped buffer. Modifications to the buffer are not visible to other processes mapping the same file, and are not written back to the file. Note that modifications of the underlying file might affect the contents of the MappedFile. Therefore, mapping should only be used if the file will not be modified, or if all modifications of the file are done atomically (e.g. using fileSetContents). Since: 2.32

6. mappedFileRef :: (HasCallStack, MonadIO m) => MappedFile -> m MappedFile

   gi-glib	GI.GLib.Structs.MappedFile

   Increments the reference count of file by one. It is safe to call this function from any thread. Since: 2.22

7. mappedFileUnref :: (HasCallStack, MonadIO m) => MappedFile -> m ()

   gi-glib	GI.GLib.Structs.MappedFile

   Decrements the reference count of file by one. If the reference count drops to 0, unmaps the buffer of file and frees it. It is safe to call this function from any thread. Since 2.22

8. 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 ]
   

9. 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 ]
   

10. 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
    

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