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| author | Marcus Arendt <[email protected]> | 2014-08-26 16:22:59 +0200 |
|---|---|---|
| committer | Marcus Arendt <[email protected]> | 2014-08-26 16:22:59 +0200 |
| commit | 3703b8964991fee50ea36f71fba115c6abc10e0b (patch) | |
| tree | af154cc510accfa02026a8577d117b9b074d6c2c /lib/stdlib/src | |
| parent | 83113d9f1df48dc73fbff82705e8aa3fb3af6723 (diff) | |
| parent | 09ed7cb41a89b56db84dd5e0b15b2fa27d198e71 (diff) | |
| download | otp-3703b8964991fee50ea36f71fba115c6abc10e0b.tar.gz otp-3703b8964991fee50ea36f71fba115c6abc10e0b.tar.bz2 otp-3703b8964991fee50ea36f71fba115c6abc10e0b.zip | |
Merge branch 'kittee/maps_only' into maint
* kittee/maps_only:
maps:only/2 -> maps:with/2
add maps:only/2
Diffstat (limited to 'lib/stdlib/src')
| -rw-r--r-- | lib/stdlib/src/maps.erl | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl index 3f019aa35a..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 ]). @@ -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)]). |