# Ds\Deque::copy

(PECL ds >= 1.0.0)

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

### Description

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

Returns a shallow copy of the deque.

### Parameters

This function has no parameters.

### Return Values

A shallow copy of the deque.

### Examples

Example #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);
?>`

The above example will output something similar to:

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