PHP Manual » Deque

Ds\Deque::rotate

(PECL ds >= 1.0.0)

Ds\Deque::rotateRotates the deque by a given number of rotations.

説明

publicvoidDs\Deque::rotate ( int$rotations )

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

パラメータ

rotations

The number of times the deque should be rotated.

返り値

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

例1 Ds\Deque::rotate() example

<?php
$deque 
= new \Ds\Deque(["a""b""c""d"]);

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

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

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\Deque Object
( [0] => d [1] => a [2] => b [3] => c
)
関連キーワード:  deque,Deque,of,rotations,the,number,Rotates,given,rotate,shifted

PHP Manual » Deque