(PECL ds >= 1.0.0)
Ds\Map::xor — Creates a new map using keys of either the current instance or of another map, but not of both
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)}
mapThe other map.
A new map containing keys in the current instance as well as another map,
but not in both.
Example #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));
?>
以上例程的输出类似于：
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => 1
)
[1] => Ds\Pair Object
(
[key] => d
[value] => 6
)
)