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Within LTS Haskell 24.38 (ghc-9.10.3)

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  1. boundedCountMaybeNext :: (Eq a, Bounded a, Enum a) => Maybe a -> Maybe a

    countable Data.Countable

    No documentation available.

  2. countMaybeNext :: Countable a => Maybe a -> Maybe a

    countable Data.Countable

    No documentation available.

  3. finiteCountMaybeNext :: Finite a => Maybe a -> Maybe a

    countable Data.Searchable

    No documentation available.

  4. CqlMaybe :: Maybe Value -> Value

    cql Database.CQL.Protocol

    No documentation available.

  5. CqlMaybe :: Maybe Value -> Value

    cql Database.CQL.Protocol.Internal

    No documentation available.

  6. envMaybe :: Var a => String -> Parser (Maybe a)

    envy System.Envy

    Environment variable getter returning Maybe

  7. suchThatMaybe :: forall a (m :: Type -> Type) . Monad m => FakeT m a -> (a -> Bool) -> FakeT m (Maybe a)

    fakedata Faker.Combinators

    Tries to generate a value that satisfies a predicate.

    λ> import qualified Faker.Address as AD
    λ> item :: forall a m. Text <- generate $ suchThatMaybe AD.country (x -> (T.length x > 5))
    λ> item
    Just Ecuador
    

  8. catMaybes :: Filtrable f => f (Maybe a) -> f a

    filtrable Data.Filtrable

    catMaybes = mapMaybe id
    

  9. mapMaybe :: Filtrable f => (a -> Maybe b) -> f a -> f b

    filtrable Data.Filtrable

    Map the container with the given function, dropping the elements for which it returns Nothing.

  10. mapMaybeA :: (Filtrable f, Traversable f, Applicative p) => (a -> p (Maybe b)) -> f a -> p (f b)

    filtrable Data.Filtrable

    Traverse the container with the given function, dropping the elements for which it returns Nothing.

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