Ds\Map::xor

Creates a new map using keys of either the current instance or of another map, but not of both

説明

public Ds\Map Ds\Map::xor(Ds\Map $map)

Creates a new map containing keys of the current instance as well as another map, but not of both.

A ⊖ B = {x : x ∈ (A \ B) ∪ (B \ A)}

パラメータ

map: The other map.

戻り値

A new map containing keys in the current instance as well as another map, but not in both.

参考

» Symmetric Difference on Wikipedia

例

例1 Ds\Map::xor example

<?php
$a = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
$b = new \Ds\Map(["b" => 4, "c" => 5, "d" => 6]);

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

上の例の出力は、たとえば以下のようになります。

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

    [1] => Ds\Pair Object
        (
            [key] => d
            [value] => 6
        )

)