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    Ds\Deque::allocate

    (PECL ds >= 1.0.0)

    Ds\Deque::allocate — Allocates enough memory for a required capacity

    説明

    public Ds\Deque::allocate(int $capacity): void

    Ensures that enough memory is allocated for a required capacity. This removes the need to reallocate the internal as values are added.

    パラメータ

    capacity

    The number of values for which capacity should be allocated.

    注意:

    Capacity will stay the same if this value is less than or equal to the current capacity.

    注意:

    Capacity will always be rounded up to the nearest power of 2.

    戻り値

    値を返しません。

    例

    例1 Ds\Deque::allocate() example

    <?php
    $deque     = new \Ds\Deque();
    var_dump($deque->capacity());

    $deque->allocate(100);
    var_dump($deque->capacity());
    ?>

    上の例の出力は、 たとえば以下のようになります。

    int(8)
int(128)

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