(PECL ds >= 1.0.0)
Ds\Vector::map — Returns the result of applying a callback to each value.
Returns the result of applying a callback
function to
each value in the vector.
callback
A callable to apply to each value in the vector.
The callable should return what the new value will be in the new vector.
The result of applying a callback
to each value in
the vector.
Note:
The values of the current instance won't be affected.
Example #1 Ds\Vector::map() example
<?php
$vector = new \Ds\Vector([1, 2, 3]);
print_r($vector->map(function($value) { return $value * 2; }));
print_r($vector);
?>
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 )