Ds\Sequence::map
PHP function
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(PECL ds >= 1.0.0)
Returns the result of applying a callback to each value
Description
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
callableto 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
Ds\Sequence::map() example
php
<?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:
output
Ds\Vector Object
(
[0] => 2
[1] => 4
[2] => 6
)
Ds\Vector Object
(
[0] => 1
[1] => 2
[2] => 3
)