Ds\Map::ksort
PHP function
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(PECL ds >= 1.0.0)
Sorts the map in-place by key
Description
Ds\Map::ksort([callable $comparator]): void
Sorts the map in-place by key, using an optional comparator function.
Parameters
comparatorDescription
Return Values
Void
Examples
Ds\Map::ksort() example
php
<?php
$map = new \Ds\Map(["b" => 2, "c" => 3, "a" => 1]);
$map->ksort();
print_r($map);
?>The above example will output something similar to:
output
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 1
)
[1] => Ds\Pair Object
(
[key] => b
[value] => 2
)
[2] => Ds\Pair Object
(
[key] => c
[value] => 3
)
)Ds\Map::ksort() example using a comparator
php
<?php
$map = new \Ds\Map([1 => "x", 2 => "y", 0 => "z"]);
// Reverse
$map->ksort(function($a, $b) {
return $b <=> $a;
});
print_r($map);
?>The above example will output something similar to:
output
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => 2
[value] => y
)
[1] => Ds\Pair Object
(
[key] => 1
[value] => x
)
[2] => Ds\Pair Object
(
[key] => 0
[value] => z
)
)