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| author | Björn Gustavsson <[email protected]> | 2018-05-07 10:30:22 +0200 |
|---|---|---|
| committer | GitHub <[email protected]> | 2018-05-07 10:30:22 +0200 |
| commit | 7a19de1bf0eb863e0d0febf7e7e5e555c8628575 (patch) | |
| tree | 84331df750b98d76b59472ecf2de657121798931 /erts/doc/src/erlang.xml | |
| parent | 49dc5d3975357971ffc3020d095a8187d80e3b69 (diff) | |
| parent | 5d0874a8f9fd617308d9024783db1e4e24268184 (diff) | |
| download | otp-7a19de1bf0eb863e0d0febf7e7e5e555c8628575.tar.gz otp-7a19de1bf0eb863e0d0febf7e7e5e555c8628575.tar.bz2 otp-7a19de1bf0eb863e0d0febf7e7e5e555c8628575.zip | |
Merge pull request #1802 from michalmuskala/map-is-key-bif
Introduce is_map_key/2 guard BIF
OTP-15037
Diffstat (limited to 'erts/doc/src/erlang.xml')
| -rw-r--r-- | erts/doc/src/erlang.xml | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index f561413fab..3154fdaf8c 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -2432,6 +2432,26 @@ os_prompt%</pre> </func> <func> + <name name="is_map_key" arity="2"/> + <fsummary></fsummary> + <desc> + <p>Returns <c>true</c> if map <c><anno>Map</anno></c> contains + <c><anno>Key</anno></c> and returns <c>false</c> if it does not + contain the <c><anno>Key</anno></c>.</p> + <p>The call fails with a <c>{badmap,Map}</c> exception if + <c><anno>Map</anno></c> is not a map.</p> + <p><em>Example:</em></p> + <code type="none"> +> Map = #{"42" => value}. +#{"42" => value} +> is_map_key("42",Map). +true +> is_map_key(value,Map). +false</code> + </desc> + </func> + + <func> <name name="is_number" arity="1"/> <fsummary>Check whether a term is a number.</fsummary> <desc> |