Hoogle Search

Within LTS Haskell 24.41 (ghc-9.10.3)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

Exact lookup

1. headDef :: forall (m :: Type -> Type) a o . Monad m => a -> ConduitT a o m a

   conduit	Data.Conduit.Combinators

   Same as head, but returns a default value if none are available from the stream.

2. headE :: forall (m :: Type -> Type) seq o . (Monad m, IsSequence seq) => ConduitT seq o m (Maybe (Element seq))

   conduit	Data.Conduit.Combinators

   Get the next element in the chunked stream.

3. headS :: forall (m :: Type -> Type) a . Monad m => StreamConsumer a m (Maybe a)

   conduit	Data.Conduit.Internal.List.Stream

   No documentation available.

4. headline :: Doc SimpleHtml -> Doc SimpleHtml

   prettyprinter	Prettyprinter.Render.Tutorials.StackMachineTutorial

   No documentation available.

5. headline :: Doc SimpleHtml -> Doc SimpleHtml

   prettyprinter	Prettyprinter.Render.Tutorials.TreeRenderingTutorial

   No documentation available.

6. headDef :: a -> [a] -> a

   safe	Safe

   No documentation available.

7. headErr :: Partial => [a] -> a

   safe	Safe

   Identical to head, namely that fails on an empty list. Useful to avoid the x-partial warning introduced in GHC 9.8.

   headErr [] = error "Prelude.head: empty list"
   headErr [1,2,3] = 1
   

8. headMay :: [a] -> Maybe a

   safe	Safe

   No documentation available.

9. headNote :: Partial => String -> [a] -> a

   safe	Safe

   No documentation available.

10. headDef :: a -> [a] -> a

    extra	Data.List.Extra

    A total head with a default value.

    headDef 1 []      == 1
    headDef 1 [2,3,4] == 2
    \x xs -> headDef x xs == fromMaybe x (listToMaybe xs)
    

Page 25 of many | Previous | Next