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Within LTS Haskell 24.4 (ghc-9.10.2)

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Exact lookup

1. head :: Unbox a => Vector a -> a

   rebase	Rebase.Data.Vector.Unboxed

   No documentation available.

2. head :: Monad m => ByteStream m r -> m (Of (Maybe Word8) r)

   streaming-bytestring	Streaming.ByteString

   O(c) Extract the first element of a ByteStream, if there is one. Suitable for use with mapped:

   S.mapped Q.head :: Stream (Q.ByteStream m) m r -> Stream (Of (Maybe Word8)) m r
   

3. head :: Monad m => ByteStream m r -> m (Of (Maybe Char) r)

   streaming-bytestring	Streaming.ByteString.Char8

   O(1) Extract the first element of a ByteStream, if possible. Suitable for use with mapped:

   S.mapped Q.head :: Stream (Q.ByteStream m) m r -> Stream (Of (Maybe Char)) m r
   

4. head :: Deque a -> Maybe a

   deque	Deque.Lazy

   , occasionally <math>. Get the first element if deque is not empty.

5. head :: MonadReader (Deque a) m => m (Maybe a)

   deque	Deque.Lazy.Reader

   , occasionally <math>. Get the first element if deque is not empty.

6. head :: MonadState (Deque a) m => m (Maybe a)

   deque	Deque.Lazy.State

   , occasionally <math>. Get the first element if deque is not empty.

7. head :: Deque a -> Maybe a

   deque	Deque.Strict

   , occasionally <math>. Get the first element if deque is not empty.

8. head :: MonadReader (Deque a) m => m (Maybe a)

   deque	Deque.Strict.Reader

   , occasionally <math>. Get the first element if deque is not empty.

9. head :: MonadState (Deque a) m => m (Maybe a)

   deque	Deque.Strict.State

   , occasionally <math>. Get the first element if deque is not empty.

10. head :: forall v a (k :: PeanoNum) . (Vector v a, Dim v ~ 'S k) => v a -> a

    fixed-vector	Data.Vector.Fixed

    First element of vector. Examples:

    >>> import Data.Vector.Fixed.Boxed (Vec3)
    
    >>> let x = mk3 1 2 3 :: Vec3 Int
    
    >>> head x
    1
    

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