International PHP Conference 2019 - Spring Edition

Ds\Map::reverse

(PECL ds >= 1.0.0)

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

说明

public void Ds\Map::reverse ( void )

Reverses the map in-place.

参数

此函数没有参数。

返回值

没有返回值。

范例

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

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

print_r($map);
?>

以上例程的输出类似于:

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
        )

)
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