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    Ds\Sequence::rotate

    (PECL ds >= 1.0.0)

    Ds\Sequence::rotate — Rotates the sequence by a given number of rotations

    説明

    abstract public Ds\Sequence::rotate(int $rotations): void

    Rotates the sequence by a given number of rotations, which is equivalent to successively calling $sequence->push($sequence->shift()) if the number of rotations is positive, or $sequence->unshift($sequence->pop()) if negative.

    パラメータ

    rotations

    The number of times the sequence should be rotated.

    戻り値

    値を返しません。. The sequence of the current instance will be rotated.

    例

    例1 Ds\Sequence::rotate() example

    <?php
    $sequence     = new \Ds\Vector(["a", "b", "c", "d"]);

    $sequence->rotate(1); // "a" is shifted, then pushed.
    print_r($sequence);

    $sequence->rotate(2); // "b" and "c" are both shifted, the pushed.
    print_r($sequence);
    ?>

    上の例の出力は、 たとえば以下のようになります。

    (
    [0] => b
    [1] => c
    [2] => d
    [3] => a
)
Ds\Vector Object
(
    [0] => d
    [1] => a
    [2] => b
    [3] => c
)

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