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(PECL ds >= 1.0.0)
Ds\Deque::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 deque.
callback
A callable to apply to each value in the deque.
The callback should return what the value should be replaced by.
値を返しません。
例1 Ds\Deque::apply() example
<?php
$deque = new \Ds\Deque([1, 2, 3]);
$deque->apply(function($value) { return $value * 2; });
print_r($deque);
?>
上の例の出力は、 たとえば以下のようになります。
Ds\Deque Object ( [0] => 2 [1] => 4 [2] => 6 )