Ds\Map::keys
Ds\Map::keys
(PECL ds >= 1.0.0)
Ds\Map::keys — Returns a set of the map's keys.
Description
public Ds\Set Ds\Map::keys ( void )
Returns a set containing all the keys of the map, in the same order.
Parameters
This function has no parameters.
Return Values
A Ds\Set containing all the keys of the map.
Examples
Example #1 Ds\Map::keys() example
<?php $map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]); var_dump($map->keys()); ?>
The above example will output something similar to:
object(Ds\Set)#2 (3) {
[0]=>
string(1) "a"
[1]=>
string(1) "b"
[2]=>
string(1) "c"
}
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https://secure.php.net/manual/en/ds-map.keys.php
