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1. parseQueryParamMaybe :: FromHttpApiData a => Text -> Maybe a

   http-api-data	Web.Internal.HttpApiData

   Parse query param value in a Maybe.

   >>> parseQueryParamMaybe "true" :: Maybe Bool
   Just True
   

2. parseUrlPieceMaybe :: FromHttpApiData a => Text -> Maybe a

   http-api-data	Web.Internal.HttpApiData

   Parse URL path piece in a Maybe.

   >>> parseUrlPieceMaybe "12" :: Maybe Int
   Just 12
   

3. contentMaybe :: forall (m :: Type -> Type) o . MonadThrow m => ConduitT Event o m (Maybe Text)

   xml-conduit	Text.XML.Stream.Parse

   Grabs the next piece of content if available. This function skips over any comments, instructions or entities, and concatenates all content until the next start or end tag.

4. runMaybeP :: forall (m :: Type -> Type) a' a b' b r . Monad m => Proxy a' a b' b (MaybeT m) r -> Proxy a' a b' b m (Maybe r)

   pipes	Pipes.Lift

   Run MaybeT in the base monad

5. mapMaybe :: forall (m :: Type -> Type) a b r . Functor m => (a -> Maybe b) -> Pipe a b m r

   pipes	Pipes.Prelude

   (mapMaybe f) yields Just results of f. Basic laws:

   mapMaybe (f >=> g) = mapMaybe f >-> mapMaybe g
   
   mapMaybe (pure @Maybe . f) = mapMaybe (Just . f) = map f
   
   mapMaybe (const Nothing) = drain
   

   As a result of the second law,

   mapMaybe return = mapMaybe Just = cat
   

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

   regex-tdfa	Data.IntMap.CharMap2

   No documentation available.

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

   regex-tdfa	Data.IntMap.CharMap2

   No documentation available.

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

   regex-tdfa	Data.IntMap.EnumMap2

   No documentation available.

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

   regex-tdfa	Data.IntMap.EnumMap2

   No documentation available.

10. class EqMaybe a b

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

    No documentation available.

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