Ds\Sequence::rotate
(PECL ds >= 1.0.0)
Ds\Sequence::rotate — Rotates the sequence by a given number of rotations
说明
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.
参数
-
rotations -
The number of times the sequence should be rotated.
返回值
没有返回值。. The sequence of the current instance will be rotated.
范例
Example #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);
?>
以上例程的输出类似于：
(
[0] => b
[1] => c
[2] => d
[3] => a
)
Ds\Vector Object
(
[0] => d
[1] => a
[2] => b
[3] => c
)
