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Within LTS Haskell 24.6 (ghc-9.10.2)

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  1. mapWithKey :: MonoidNull v2 => (k -> v1 -> v2) -> MonoidMap k v1 -> MonoidMap k v2

    monoidmap Data.MonoidMap

    Applies a key-dependent function to all non-null values of a MonoidMap. Satisfies the following properties for all functions f:

    (nonNullKey k m) ==> (get k (mapWithKey f m) == f k (get k m))
    (   nullKey k m) ==> (get k (mapWithKey f m) == mempty       )
    

  2. mapAPI :: (MapAPI a b, Applicative m) => (GQLRequest -> m GQLResponse) -> a -> m b

    morpheus-graphql-app Data.Morpheus.App

    No documentation available.

  3. mapM :: Monad m => (a -> m b) -> NonEmptyVector a -> m (NonEmptyVector b)

    nonempty-vector Data.Vector.NonEmpty

    O(n) Apply the monadic action to all elements of the non-empty vector, yielding non-empty vector of results.

    >>> mapM Just (unsafeFromList [1..3])
    Just [1,2,3]
    
    >>> mapM (const Nothing) (unsafeFromList [1..3])
    Nothing
    

  4. mapM_ :: Monad m => (a -> m b) -> NonEmptyVector a -> m ()

    nonempty-vector Data.Vector.NonEmpty

    O(n) Apply the monadic action to all elements of a non-empty vector and ignore the results.

    >>> mapM_ (const $ Just ()) (unsafeFromList [1..3])
    Just ()
    
    >>> mapM_ (const Nothing) (unsafeFromList [1..3])
    Nothing
    

  5. mapMaybe :: (a -> Maybe b) -> NonEmptyVector a -> Vector b

    nonempty-vector Data.Vector.NonEmpty

    O(n) Drop elements when predicate returns Nothing If no elements satisfy the predicate, the resulting vector may be empty.

    >>> mapMaybe (\a -> if a == 2 then Nothing else Just a) (unsafeFromList [1..3])
    [1,3]
    

  6. mapInIO :: (output -> IO newOutput) -> Parse output -> Parse newOutput

    ptr Ptr.Parse

    No documentation available.

  7. mapCategoricalPs :: (Num p, Num q) => (p -> q) -> Categorical p e -> Categorical q e

    random-fu Data.Random.Distribution.Categorical

    Like fmap, but for the probabilities of a categorical distribution.

  8. mapIO :: (a -> IO b) -> AddHandler a -> AddHandler b

    reactive-banana Control.Event.Handler

    Map the event value with an IO action.

  9. mapAccum :: MonadMoment m => acc -> Event (acc -> (x, acc)) -> m (Event x, Behavior acc)

    reactive-banana Reactive.Banana.Combinators

    Efficient combination of accumE and accumB.

  10. mapEventIO :: (a -> IO b) -> Event a -> MomentIO (Event b)

    reactive-banana Reactive.Banana.Frameworks

    Build a new Event that contains the result of an IO computation. The input and result events will not be simultaneous anymore, the latter will occur later than the former. Please use the fmap for Event if your computation is pure. Implementation:

    mapEventIO f e1 = do
    (e2, handler) <- newEvent
    reactimate $ (\a -> f a >>= handler) <$> e1
    return e2
    

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