Fold.Pure.Utilities

Documentation

duplicate :: Fold a b -> Fold a (Fold a b)

Allows to continue feeding a fold even after passing it to a function that closes it

premap :: (a -> b) -> Fold b r -> Fold a r

Applies a function to each input before processing

prefilter :: (a -> Bool) -> Fold a r -> Fold a r

Consider only inputs that match a predicate

predropWhile :: (a -> Bool) -> Fold a r -> Fold a r

Ignores inputs until they stop satisfying a predicate

drop :: Natural -> Fold a b -> Fold a b

Ignores the first n inputs

nest :: Applicative f => Fold a b -> Fold (f a) (f b)

Nest a fold in an applicative