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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

    Descrizione

    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}

    Elenco dei parametri

    map

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

    Valori restituiti

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

    Vedere anche:

    Esempi

    Example #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));
    ?>

    Il precedente esempio visualizzerà qualcosa simile a:

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