Ds\Sequence::map
(PECL ds >= 1.0.0)
Ds\Sequence::map — Returns the result of applying a callback to each value
Description
abstract public Ds\Sequence::map ( callable $callback ) : Ds\Sequence
Returns the result of applying a callback function to each value in the sequence.
Parameters
-
callback -
callback ( mixed $value ) : mixed
A callable to apply to each value in the sequence.
The callable should return what the new value will be in the new sequence.
Return Values
The result of applying a callback to each value in the sequence.
Note:
The values of the current instance won't be affected.
Examples
Example #1 Ds\Sequence::map() example
<?php
$sequence = new \Ds\Vector([1, 2, 3]);
print_r($sequence->map(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
)
Ds\Vector Object
(
[0] => 1
[1] => 2
[2] => 3
)
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/ds-sequence.map.php