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| author | Björn-Egil Dahlberg <[email protected]> | 2014-03-16 23:32:44 +0100 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2014-03-16 23:32:44 +0100 |
| commit | 50cbd99857a674f2b082f5c436b7e721d33f4cd0 (patch) | |
| tree | 63e40d5e0219497a26889f1b431b98919e7cf72c /erts/doc/src | |
| parent | e6ff6cce0dba69ed495f098921d8ed6115007816 (diff) | |
| download | otp-50cbd99857a674f2b082f5c436b7e721d33f4cd0.tar.gz otp-50cbd99857a674f2b082f5c436b7e721d33f4cd0.tar.bz2 otp-50cbd99857a674f2b082f5c436b7e721d33f4cd0.zip | |
erts: Document map guard functions
* erlang:is_map/1
* erlang:map_size/1
Diffstat (limited to 'erts/doc/src')
| -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 aeded7c719..e34646eaf0 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -1784,6 +1784,15 @@ os_prompt% </pre> </desc> </func> <func> + <name name="is_map" arity="1"/> + <fsummary>Check whether a term is a map</fsummary> + <desc> + <p>Returns <c>true</c> if <c><anno>Term</anno></c> is a map; + otherwise returns <c>false</c>.</p> + <p>Allowed in guard tests.</p> + </desc> + </func> + <func> <name name="is_number" arity="1"/> <fsummary>Check whether a term is a number</fsummary> <desc> @@ -2220,6 +2229,17 @@ os_prompt% </pre> </desc> </func> <func> + <name name="map_size" arity="1"/> + <fsummary>Return the size of a map</fsummary> + <desc> + <p>Returns an integer which is the number of key-value pairs in <c><anno>Map</anno></c>.</p> + <pre> +> <input>map_size(#{a=>1, b=>2, c=>3}).</input> +3</pre> + <p>Allowed in guard tests.</p> + </desc> + </func> + <func> <name name="max" arity="2"/> <fsummary>Return the largest of two term</fsummary> <desc> |