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    Ds\Map::diff

    (PECL ds >= 1.0.0)

    Ds\Map::diff — Creates a new map using keys that aren't in another map

    Beschreibung

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

    Returns the result of removing all keys from the current instance that are present in a given map.

    A \ B = {x ∈ A | x ∉ B}

    Parameter-Liste

    map

    The map containing the keys to exclude in the resulting map.

    Rückgabewerte

    The result of removing all keys from the current instance that are present in a given map.

    Siehe auch

    Beispiele

    Beispiel #1 Ds\Map::diff() example

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

    var_dump($a->diff($b));
    ?>

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    object(Ds\Map)#3 (1) {
  [0]=>
  object(Ds\Pair)#4 (2) {
    ["key"]=>
    string(1) "a"
    ["value"]=>
    int(1)
  }
}
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