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-rw-r--r--lib/stdlib/src/maps.erl17
1 files changed, 14 insertions, 3 deletions
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl
index 4ef1638e6d..ba4d6a5c87 100644
--- a/lib/stdlib/src/maps.erl
+++ b/lib/stdlib/src/maps.erl
@@ -24,6 +24,7 @@
map/2,
size/1,
without/2,
+ with/2,
get/3
]).
@@ -133,10 +134,10 @@ to_list(_) -> erlang:nif_error(undef).
update(_,_,_) -> erlang:nif_error(undef).
--spec values(Map) -> Keys when
+-spec values(Map) -> Values when
Map :: map(),
- Keys :: [Key],
- Key :: term().
+ Values :: [Value],
+ Value :: term().
values(_) -> erlang:nif_error(undef).
@@ -201,3 +202,13 @@ size(Map) when is_map(Map) ->
without(Ks, M) when is_list(Ks), is_map(M) ->
maps:from_list([{K,V}||{K,V} <- maps:to_list(M), not lists:member(K, Ks)]).
+
+
+-spec with(Ks, Map1) -> Map2 when
+ Ks :: [K],
+ Map1 :: map(),
+ Map2 :: map(),
+ K :: term().
+
+with(Ks, M) when is_list(Ks), is_map(M) ->
+ maps:from_list([{K,V}||{K,V} <- maps:to_list(M), lists:member(K, Ks)]).