(PECL ds >= 1.0.0)
Ds\Sequence::unshift — Adds values to the front of the sequence
Adds values to the front of the sequence, moving all the current values forward to make room for the new values.
valuesThe values to add to the front of the sequence.
Note:
Multiple values will be added in the same order that they are passed.
没有返回值。
Example #1 Ds\Sequence::unshift() example
<?php
$sequence = new \Ds\Vector([1, 2, 3]);
$sequence->unshift("a");
$sequence->unshift("b", "c");
print_r($sequence);
?>
以上例程的输出类似于：
Ds\Vector Object
(
[0] => b
[1] => c
[2] => a
[3] => 1
[4] => 2
[5] => 3
)