Php/docs/ds-deque.shift

• PHP Manual
• Deque
• Removes and returns the first value

Ds\Deque::shift

(PECL ds >= 1.0.0)

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

说明

public Ds\Deque::shift ( ) : mixed

Removes and returns the first value.

参数

此函数没有参数。

返回值

The first value, which was removed.

错误／异常

UnderflowException if empty.

范例

Example #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());?>

以上例程的输出类似于：

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