(PECL ds >= 1.0.0)
Ds\Vector::apply — Updates all values by applying a callback function to each value
Updates all values by applying a callback function to
each value in the vector.
callback
A callable to apply to each value in the vector.
The callback should return what the value should be replaced by.
没有返回值。
Example #1 Ds\Vector::apply() example
<?php
$vector = new \Ds\Vector([1, 2, 3]);
$vector->apply(function($value) { return $value * 2; });
print_r($vector);
?>
以上例程的输出类似于：
Ds\Vector Object
(
[0] => 2
[1] => 4
[2] => 6
)