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Fix inverted semantics of union.

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This commit is contained in:
Rob Rix 2015-12-14 17:06:14 -05:00
parent 1e7dc0ff98
commit 92a28ad38a
1 changed files with 1 additions and 1 deletions
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src/OrderedMap.hs
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@ -38,7 +38,7 @@ empty :: OrderedMap key value
empty = OrderedMap []
union :: Eq key => OrderedMap key value -> OrderedMap key value -> OrderedMap key value
union (OrderedMap a) (OrderedMap b) = OrderedMap $ a ++ filter (not . (`elem` extant) . fst) b
union (OrderedMap a) (OrderedMap b) = OrderedMap $ a ++ filter ((`elem` extant) . fst) b
where extant = fst <$> a
unions :: Eq key => [OrderedMap key value] -> OrderedMap key value