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| author | Marcus Arendt <[email protected]> | 2014-08-26 16:24:11 +0200 |
|---|---|---|
| committer | Marcus Arendt <[email protected]> | 2014-08-26 16:24:11 +0200 |
| commit | 84716a6075614e5b776b9b0357f7c2e5d897d168 (patch) | |
| tree | b09b11b7e1ef2b6387d740a94715f4995f8a91a6 /lib/stdlib/src/maps.erl | |
| parent | a75f44aafa24d38d9ab3036d2059ce0915069105 (diff) | |
| parent | 3703b8964991fee50ea36f71fba115c6abc10e0b (diff) | |
| download | otp-84716a6075614e5b776b9b0357f7c2e5d897d168.tar.gz otp-84716a6075614e5b776b9b0357f7c2e5d897d168.tar.bz2 otp-84716a6075614e5b776b9b0357f7c2e5d897d168.zip | |
Merge branch 'maint'
Diffstat (limited to 'lib/stdlib/src/maps.erl')
| -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)]). |