Ds\Set::copy

(PECL ds >= 1.0.0)

Ds\Set::copy — Returns a shallow copy of the set

说明

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

Returns a shallow copy of the set.

参数

此函数没有参数。

返回值

Returns a shallow copy of the set.

范例

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

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

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

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

以上例程的输出类似于：

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