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.
返り値
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 )