Ds\Deque::shift

(PECL ds >= 1.0.0)

Ds\Deque::shift — Removes and returns the first value

public Ds\Deque::shift(): mixed

Removes and returns the first value.

此函数没有参数。

The first value, which was removed.

示例 #1 Ds\Deque::shift() example

<?php
$deque = new \Ds\Deque(["a", "b", "c"]);

var_dump($deque->shift());
var_dump($deque->shift());
var_dump($deque->shift());
?>

以上示例的输出类似于：

string(1) "a"
string(1) "b"
string(1) "c"