Ds\Map::apply
PHP function
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(PECL ds >= 1.0.0)
Updates all values by applying a callback function to each value
Description
Ds\Map::apply(callable $callback): void
Updates all values by applying a callback function to each value in the map.
Parameters
callback- callback(mixed $key, mixed $value): mixed
A
callableto apply to each value in the map.The callback should return what the value should be replaced by.
Return Values
Void
Examples
Ds\Map::apply() example
php
<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
$map->apply(function($key, $value) { return $value * 2; });
print_r($map);
?>The above example will output something similar to:
output
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 2
)
[1] => Ds\Pair Object
(
[key] => b
[value] => 4
)
[2] => Ds\Pair Object
(
[key] => c
[value] => 6
)
)