Ds\Sequence::unshift

(PECL ds >= 1.0.0)

Ds\Sequence::unshift — Adds values to the front of the sequence

abstract public Ds\Sequence::unshift(mixed $values = ?): void

Adds values to the front of the sequence, moving all the current values forward to make room for the new values.

values

The values to add to the front of the sequence.

注意:
Multiple values will be added in the same order that they are passed.

没有返回值。

示例 #1 Ds\Sequence::unshift() example

<?php
$sequence = new \Ds\Vector([1, 2, 3]);

$sequence->unshift("a");
$sequence->unshift("b", "c");

print_r($sequence);
?>

以上示例的输出类似于：

Ds\Vector Object
(
    [0] => b
    [1] => c
    [2] => a
    [3] => 1
    [4] => 2
    [5] => 3
)