elem package:streamly

elem :: (Monad m, Eq a) => a -> SerialT m a -> m Bool
streamly Streamly.Internal.Data.Stream.IsStream Streamly.Prelude
Determine whether an element is present in the stream. 
elem = Stream.fold Fold.elem
elemIndex :: (Monad m, Eq a) => a -> SerialT m a -> m (Maybe Int)
streamly Streamly.Internal.Data.Stream.IsStream Streamly.Prelude
Returns the first index where a given value is found in the stream. 
elemIndex a = Stream.findIndex (== a)
elemIndices :: (IsStream t, Eq a, Monad m) => a -> t m a -> t m Int
streamly Streamly.Internal.Data.Stream.IsStream Streamly.Prelude
Find all the indices where the value of the element in the stream is equal to the given value. 
elemIndices a = findIndices (== a)
notElem :: (Monad m, Eq a) => a -> SerialT m a -> m Bool
streamly Streamly.Internal.Data.Stream.IsStream Streamly.Prelude
Determine whether an element is not present in the stream. 
notElem = Stream.fold Fold.length