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Within LTS Haskell 24.4 (ghc-9.10.2)

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  1. fIRST_TAG :: ConTag

    ghc GHC.Types.Basic

    Tags are allocated from here for real constructors or for superclass selectors

  2. firstDataDefnCon :: DataDefnCons a -> Maybe a

    ghc Language.Haskell.Syntax.Decls

    Retrieve the first data constructor in a DataDefnCons (if one exists).

  3. firstNull :: P -> Bool

    regex-tdfa Text.Regex.TDFA.CorePattern

    No documentation available.

  4. firstChildWithLocalName :: Text -> Element -> Maybe Element

    haskell-gi Data.GI.GIR.XMLUtils

    Find the first child element with the given name.

  5. first3 :: T (a, b, c) a

    data-accessor Data.Accessor.Tuple

    Access to the first value of a triple.

  6. firstM :: Monad m => (a -> m Bool) -> [a] -> m (Maybe a)

    monad-loops Control.Monad.Loops

    return the first value from a list, if any, satisfying the given predicate.

  7. firstDayOfWeekOnAfter :: DayOfWeek -> Day -> Day

    rio RIO.Time

    The first day-of-week on or after some day

  8. firstChild :: Cursor -> Maybe Cursor

    xml Text.XML.Light.Cursor

    The first child of the given location.

  9. firstDayOfWeekOnAfter :: DayOfWeek -> Day -> Day

    time-compat Data.Time.Calendar.Compat

    The first day-of-week on or after some day

  10. first1Of :: Getting (First a) s a -> s -> a

    diagrams-lib Diagrams.Prelude

    Retrieve the First entry of a Fold1 or Traversal1 or the result from a Getter or Lens. 

    >>> first1Of traverse1 (1 :| [2..10])
1

    >>> first1Of both1 (1,2)
1
    Note: this is different from ^.. 
    >>> first1Of traverse1 ([1,2] :| [[3,4],[5,6]])
[1,2]

    >>> ([1,2] :| [[3,4],[5,6]]) ^. traverse1
[1,2,3,4,5,6]

    first1Of :: Getter s a      -> s -> a
first1Of :: Fold1 s a       -> s -> a
first1Of :: Lens' s a       -> s -> a
first1Of :: Iso' s a        -> s -> a
first1Of :: Traversal1' s a -> s -> a

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