Ds\Vector::rotate
(PECL ds >= 1.0.0)
Ds\Vector::rotate — Rotates the vector by a given number of rotations.
説明
public void Ds\Vector::rotate
( int
$rotations
)
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
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
)
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