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Streamline keys and elems #158

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Streamline keys and elems #158

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4 changes: 2 additions & 2 deletions Data/HashMap/Base.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -1161,13 +1161,13 @@ filter p = filterWithKey (\_ v -> p v)
-- | /O(n)/ Return a list of this map's keys. The list is produced
-- lazily.
keys :: HashMap k v -> [k]
keys = L.map fst . toList
keys t = build (\ c z -> foldrWithKey (\ k _v ks -> c k ks) z t)
{-# INLINE keys #-}

-- | /O(n)/ Return a list of this map's values. The list is produced
-- lazily.
elems :: HashMap k v -> [v]
elems = L.map snd . toList
elems t = build (\ c z -> foldrWithKey (\ _k v vs -> c v vs) z t)
{-# INLINE elems #-}

------------------------------------------------------------------------
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