2e7c628 · streamly · git.iko.soy

Changelog.md+1

@@ -1,6 +1,7 @@

1## Unreleased

2

3### Enhancements

4+* Make `cons` right associative and provide an operator form `.:` for it

4* Add `null`, `tail`, `reverse`, `replicateM`, `scan` stream operations

5* Add `null`, `tail`, `reverse`, `replicateM`, `scan` stream operations

5* Improve performance of some stream operations (`foldl`, `dropWhile`)

6* Improve performance of some stream operations (`foldl`, `dropWhile`)

6

7

src/Streamly/Prelude.hs+2−1

@@ -380,7 +380,7 @@ notElem e m = go (toStream m)

380length :: (Streaming t, Monad m) => t m a -> m Int

381length = foldl (\n _ -> n + 1) 0 id

382

383−-- | Returns the elements of the stream in reverse order.

383+-- | Returns the elements of the stream in reverse order.

384-- The stream must be finite.

385reverse :: (Streaming t) => t m a -> t m a

386reverse m = fromStream $ go Nothing (toStream m)

@@ -463,6 +463,7 @@ sequence m = fromStream $ go (toStream m)

463 yield a (Just x) = a >>= \b -> yld b (Just (go x))

464 in (runStream m1) Nothing stop yield

465

466+-- | Generate a stream by performing an action @n@ times.

466replicateM :: (Streaming t, Monad m) => Int -> m a -> t m a

467replicateM :: (Streaming t, Monad m) => Int -> m a -> t m a

467replicateM n m = fromStream $ go n

468replicateM n m = fromStream $ go n

468 where

469 where

src/Streamly/Streams.hs+1−1

@@ -112,7 +112,7 @@ class Streaming t where

112-- Constructing a stream

113------------------------------------------------------------------------------

114

115−-- | Represesnts an empty stream just like @[]@ represents and empty list.

115+-- | Represesnts an empty stream just like @[]@ represents an empty list.

116nil :: Streaming t => t m a

117nil = fromStream snil

118