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
)

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