34 lines
1.4 KiB
Diff
34 lines
1.4 KiB
Diff
|
diff --git a/server/src-lib/Data/HashMap/Strict/Extended.hs b/server/src-lib/Data/HashMap/Strict/Extended.hs
|
||
|
|
index eaff0dfba..9902cadd0 100644
|
||
|
|
--- a/src-lib/Data/HashMap/Strict/Extended.hs
|
||
|
|
+++ b/src-lib/Data/HashMap/Strict/Extended.hs
|
||
|
|
@@ -7,7 +7,6 @@ module Data.HashMap.Strict.Extended
|
||
|
|
, groupOnNE
|
||
|
|
, differenceOn
|
||
|
|
, lpadZip
|
||
|
|
- , mapKeys
|
||
|
|
, unionsWith
|
||
|
|
) where
|
||
|
|
|
||
|
|
@@ -54,20 +53,6 @@ lpadZip left = catMaybes . flip A.alignWith left \case
|
||
|
|
That b -> Just (Nothing, b)
|
||
|
|
These a b -> Just (Just a, b)
|
||
|
|
|
||
|
|
--- | @'mapKeys' f s@ is the map obtained by applying @f@ to each key of @s@.
|
||
|
|
---
|
||
|
|
--- The size of the result may be smaller if @f@ maps two or more distinct
|
||
|
|
--- keys to the same new key. In this case the value at the greatest of the
|
||
|
|
--- original keys is retained.
|
||
|
|
---
|
||
|
|
--- > mapKeys (+ 1) (fromList [(5,"a"), (3,"b")]) == fromList [(4, "b"), (6, "a")]
|
||
|
|
--- > mapKeys (\ _ -> 1) (fromList [(1,"b"), (2,"a"), (3,"d"), (4,"c")]) == singleton 1 "c"
|
||
|
|
--- > mapKeys (\ _ -> 3) (fromList [(1,"b"), (2,"a"), (3,"d"), (4,"c")]) == singleton 3 "c"
|
||
|
|
---
|
||
|
|
--- copied from https://hackage.haskell.org/package/containers-0.6.4.1/docs/src/Data.Map.Internal.html#mapKeys
|
||
|
|
-mapKeys :: (Ord k2, Hashable k2) => (k1 -> k2) -> HashMap k1 a -> HashMap k2 a
|
||
|
|
-mapKeys f = fromList . foldrWithKey (\k x xs -> (f k, x) : xs) []
|
||
|
|
-
|
||
|
|
-- | The union of a list of maps, with a combining operation:
|
||
|
|
-- (@'unionsWith' f == 'Prelude.foldl' ('unionWith' f) 'empty'@).
|
||
|
|
--
|