Php/docs/ds-vector.rotate

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Ds\Vector::rotate

(PECL ds >= 1.0.0)

Ds\Vector::rotateRotates the vector by a given number of rotations


説明

public Ds\Vector::rotate ( int $rotations ) : void

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


パラメータ

rotations
The number of times the vector should be rotated.


返り値

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


例1 Ds\Vector::rotate() example

<?php$vector = new \Ds\Vector(["a", "b", "c", "d"]);$vector->rotate(1);  // "a" is shifted, then pushed.print_r($vector);$vector->rotate(2);  // "b" and "c" are both shifted, the pushed.print_r($vector);?>

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
)