Ds\Stack::copy

(PECL ds >= 1.0.0)

Ds\Stack::copy — Returns a shallow copy of the stack

说明

public Ds\Stack::copy ( void ) : Ds\Stack

Returns a shallow copy of the stack.

参数

此函数没有参数。

返回值

Returns a shallow copy of the stack.

范例

Example #1 Ds\Stack::copy() example

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

// Updating the copy doesn't affect the original
$b->push(4);

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

以上例程的输出类似于：

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