foldl' is:exact -package:containers -package:base -package:ghc -package:vector package:streamly

foldl' :: Monad m => (b -> a -> b) -> b -> SerialT m a -> m b
streamly Streamly.Internal.Data.Stream.IsStream Streamly.Internal.Data.Stream.IsStream.Eliminate Streamly.Prelude
Left associative/strict push fold. foldl' reduce initial stream invokes reduce with the accumulator and the next input in the input stream, using initial as the initial value of the current value of the accumulator. When the input is exhausted the current value of the accumulator is returned. Make sure to use a strict data structure for accumulator to not build unnecessary lazy expressions unless that's what you want. See the previous section for more details.
foldl' :: (IsStream t, Monad m) => (b -> a -> b) -> b -> t m a -> m b
streamly Streamly.Internal.Data.Stream.IsStream.Type
Strict left associative fold.