Ds\Deque::apply
(PECL ds >= 1.0.0)
Ds\Deque::apply — Updates all values by applying a callback function to each value
説明
public Ds\Deque::apply
( callable $callback
) : void
Updates all values by applying a callback
function to
each value in the deque.
パラメータ
callback
-
A callable to apply to each value in the deque.
The callback should return what the value should be replaced by.
返り値
値を返しません。
例
例1 Ds\Deque::apply() example
<?php$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 )