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mapWithKey :: MonoidNull v2 => (k -> v1 -> v2) -> MonoidMap k v1 -> MonoidMap k v2monoidmap 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 )
mapAPI :: (MapAPI a b, Applicative m) => (GQLRequest -> m GQLResponse) -> a -> m bmorpheus-graphql-app Data.Morpheus.App No documentation available.
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
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
mapMaybe :: (a -> Maybe b) -> NonEmptyVector a -> Vector bnonempty-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]
mapInIO :: (output -> IO newOutput) -> Parse output -> Parse newOutputptr Ptr.Parse No documentation available.
mapCategoricalPs :: (Num p, Num q) => (p -> q) -> Categorical p e -> Categorical q erandom-fu Data.Random.Distribution.Categorical Like fmap, but for the probabilities of a categorical distribution.
mapIO :: (a -> IO b) -> AddHandler a -> AddHandler breactive-banana Control.Event.Handler Map the event value with an IO action.
mapAccum :: MonadMoment m => acc -> Event (acc -> (x, acc)) -> m (Event x, Behavior acc)reactive-banana Reactive.Banana.Combinators 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