# Ds\Map::reverse

(PECL ds >= 1.0.0)

Ds\Map::reverse — Reverses the map in-place

### Description

public Ds\Map::reverse ( ) : void

Reverses the map in-place.

### Parameters

This function has no parameters.

### Return Values

No value is returned.

### Examples

Example #1 Ds\Map::reverse() example

`<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
$map->reverse();
print_r($map);
?>`

The above example will output something similar to:

    Ds\Map Object
    (
        [0] => Ds\Pair Object
            (
                [key] => c
                [value] => 3
            )

        [1] => Ds\Pair Object
            (
                [key] => b
                [value] => 2
            )

        [2] => Ds\Pair Object
            (
                [key] => a
                [value] => 1
            )

    )