Ds\Deque::copy

(PECL ds >= 1.0.0)

Ds\Deque::copy — Returns a shallow copy of the deque

public Ds\Deque::copy(): Ds\Deque

Returns a shallow copy of the deque.

此函数没有参数。

A shallow copy of the deque.

示例 #1 Ds\Deque::copy() example

<?php
$a = new \Ds\Deque([1, 2, 3]);
$b = $a->copy();

$b->push(4);

print_r($a);
print_r($b);
?>

以上示例的输出类似于：

Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
)
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)