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  1. first :: forall a (m :: Type -> Type) b c . a -> Unfold m (a, b) c -> Unfold m b c

    streamly-core Streamly.Internal.Data.Unfold

    Supply the first component of the tuple to an unfold that accepts a tuple as a seed resulting in a fold that accepts the second component of the tuple as a seed. 

    first a = Unfold.lmap (a, )
    Pre-release

  2. first :: (a -> a') -> (a, b) -> (a', b)

    code-conjure Conjure.Utils

    Applies a function to the first element of a pair. Often known on the wild as mapFst. 

    > first (*10) (1,2)
(10,2)

  3. first :: Arrow a => a b c -> a (b, d) (c, d)

    dunai Data.MonadicStreamFunction.Core

    Send the first component of the input through the argument arrow, and copy the rest unchanged to the output.

  4. first :: Maybe a <-> First a

    invertible Data.Invertible.Monoid

    (Un)wrap the First monoid.

  5. first :: Tidally => ControlPattern -> IO ()

    tidal Sound.Tidal.Boot

    See first.

  6. first :: ControlPattern -> Op ()

    tidal Sound.Tidal.Safe.Boot

    No documentation available.

  7. first :: (Key -> TomlCodec a) -> Key -> TomlCodec (First a)

    tomland Toml.Codec.Combinator.Monoid

    Codec for First wrapper for given converter's values. Decodes to First Nothing when the key is not present.

  8. first :: Bifunctor p => (a -> b) -> p a c -> p b c

    classy-prelude-yesod ClassyPrelude.Yesod

    Map covariantly over the first argument. 

    first f ≡ bimap f id

    Examples

    >>> first toUpper ('j', 3)
('J',3)

    >>> first toUpper (Left 'j')
Left 'J'

  9. first :: (Morphism a, ObjectPair a b d, ObjectPair a c d) => a b c -> a (b, d) (c, d)

    constrained-categories Control.Arrow.Constrained

    No documentation available.

  10. first :: LogEntryOperation -> Maybe Bool

    gogol-logging Gogol.Logging

    Optional. Set this to True if this is the first log entry in the operation.

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