findIndices package:streamly-core

findIndices :: Monad m => (a -> Bool) -> Fold m a (Maybe Int)

Returns the index of the latest element if the element satisfies the given predicate.

findIndices :: Monad m => (a -> Bool) -> Stream m a -> Stream m Int

Find all the indices where the element in the stream satisfies the given predicate.

>>> findIndices p = Stream.scanMaybe (Fold.findIndices p)

findIndices :: (a -> Bool) -> StreamK m a -> StreamK m Int

Unimplemented