:: (a -> a -> a) -> t a -> a package:rio

foldl1 :: Foldable t => (a -> a -> a) -> t a -> a
rio RIO.List.Partial
A variant of foldl that has no base case, and thus may only be applied to non-empty structures. 
foldl1 f = foldl1 f . toList
foldr1 :: Foldable t => (a -> a -> a) -> t a -> a
rio RIO.List.Partial
A variant of foldr that has no base case, and thus may only be applied to non-empty structures. 
foldr1 f = foldr1 f . toList
foldl1 :: Vector v a => (a -> a -> a) -> v a -> a
rio RIO.Vector.Partial
O(n) Left fold on non-empty vectors
foldl1' :: Vector v a => (a -> a -> a) -> v a -> a
rio RIO.Vector.Partial
O(n) Left fold on non-empty vectors with strict accumulator
foldr1 :: Vector v a => (a -> a -> a) -> v a -> a
rio RIO.Vector.Partial
O(n) Right fold on non-empty vectors
foldr1' :: Vector v a => (a -> a -> a) -> v a -> a
rio RIO.Vector.Partial
O(n) Right fold on non-empty vectors with strict accumulator