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| author | Sergey Abramyan <[email protected]> | 2014-04-12 11:44:19 +0400 |
|---|---|---|
| committer | Sergey Abramyan <[email protected]> | 2014-04-12 11:44:19 +0400 |
| commit | ad4c02a9d7794727c78d36bd47b7272af3efc523 (patch) | |
| tree | 9e91e5e9177f154531119b984a29655b82dd9690 | |
| parent | 07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff) | |
| download | otp-ad4c02a9d7794727c78d36bd47b7272af3efc523.tar.gz otp-ad4c02a9d7794727c78d36bd47b7272af3efc523.tar.bz2 otp-ad4c02a9d7794727c78d36bd47b7272af3efc523.zip | |
Add default value for maps:get
| -rw-r--r-- | lib/stdlib/src/maps.erl | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl index fd6d56fa47..4ef1638e6d 100644 --- a/lib/stdlib/src/maps.erl +++ b/lib/stdlib/src/maps.erl @@ -23,7 +23,8 @@ fold/3, map/2, size/1, - without/2 + without/2, + get/3 ]). @@ -142,6 +143,21 @@ values(_) -> erlang:nif_error(undef). %%% End of BIFs +-spec get(Key, Map, Default) -> Value | Default when + Key :: term(), + Map :: map(), + Value :: term(), + Default :: term(). + +get(Key, Map, Default) -> + case maps:find(Key, Map) of + {ok, Value} -> + Value; + error -> + Default + end. + + -spec fold(Fun,Init,Map) -> Acc when Fun :: fun((K, V, AccIn) -> AccOut), Init :: term(), |