PHP Manual: Updates all values by applying a callback function to each value.

abstract public void Ds\Sequence::apply ( callable $callback )

Updates all values by applying a callback function to each value in the sequence.

callback

mixed callback ( mixed $value )

A callable to apply to each value in the sequence.

The callback should return what the value should be replaced by.

No value is returned.

Example #1 Ds\Sequence::apply example


<?php
$sequence = new \Ds\Sequence([1, 2, 3]);
$sequence->apply(function($value) { return $value * 2; });

print_r($sequence);
?>

The above example will output something similar to:

Ds\Vector Object
(
    [0] => 2
    [1] => 4
    [2] => 6
)