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

   haskell-gi-base	Data.GI.Base.ShortPrelude

   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.

2. mapFirst :: (a -> c) -> [(a, b)] -> [(c, b)]

   haskell-gi-base	Data.GI.Base.Utils

   Given a function and a list of two-tuples, apply the function to every first element of the tuples.

3. mapFirstA :: Applicative f => (a -> f c) -> [(a, b)] -> f [(c, b)]

   haskell-gi-base	Data.GI.Base.Utils

   Applicative version of mapFirst.

4. mapSecond :: (b -> c) -> [(a, b)] -> [(a, c)]

   haskell-gi-base	Data.GI.Base.Utils

   Same for the second element.

5. mapSecondA :: Applicative f => (b -> f c) -> [(a, b)] -> f [(a, c)]

   haskell-gi-base	Data.GI.Base.Utils

   Applicative version of mapSecond.

6. mapAccept :: Accept a => [(a, b)] -> ByteString -> Maybe b

   http-media	Network.HTTP.Media

   The equivalent of matchAccept above, except the resulting choice is mapped to another value. Convenient for specifying how to translate the resource into each of its available formats.

   getHeader >>= maybe render406Error renderResource . mapAccept
   [ ("text" // "html",        asHtml)
   , ("application" // "json", asJson)
   ]
   

7. mapAcceptBytes :: [(ByteString, b)] -> ByteString -> Maybe b

   http-media	Network.HTTP.Media

   A specialisation of mapAccept that only takes ByteString as its input, to avoid ambiguous-type errors when using string literal overloading.

   getHeader >>= maybe render406Error encodeResourceWith . mapAcceptBytes
   [ ("abc", abc)
   , ("xyz", xyz)
   ]
   

8. mapAcceptCharset :: [(Charset, b)] -> ByteString -> Maybe b

   http-media	Network.HTTP.Media

   A specialisation of mapAccept that only takes Charset as its input, to avoid ambiguous-type errors when using string literal overloading.

   getHeader >>= maybe render406Error renderResource . mapAcceptCharset
   [ ("utf-8",    inUtf8)
   , ("us-ascii", inAscii)
   ]
   

9. mapAcceptEncoding :: [(Encoding, b)] -> ByteString -> Maybe b

   http-media	Network.HTTP.Media

   A specialisation of mapAccept that only takes Encoding as its input, to avoid ambiguous-type errors when using string literal overloading.

   getHeader >>= maybe render406Error renderResource . mapAcceptEncoding
   [ ("compress", compress)
   , ("identity", id)
   ]
   

10. mapAcceptLanguage :: [(Language, b)] -> ByteString -> Maybe b

    http-media	Network.HTTP.Media

    A specialisation of mapAccept that only takes Language as its input, to avoid ambiguous-type errors when using string literal overloading.

    getHeader >>= maybe render406Error renderResource . mapAcceptLanguage
    [ ("en-gb", inBritishEnglish)
    , ("fr",    inFrench)
    ]
    

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