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    Ds\Set::intersect

    (PECL ds >= 1.0.0)

    Ds\Set::intersect — Creates a new set by intersecting values with another set

    説明

    public Ds\Set::intersect(Ds\Set $set): Ds\Set

    Creates a new set using values common to both the current instance and another set. In other words, returns a copy of the current instance with all values removed that are not in the other set.

    A ∩ B = {x : x ∈ A ∧ x ∈ B}

    パラメータ

    set

    The other set.

    戻り値

    The intersection of the current instance and another set.

    参考

    例

    例1 Ds\Set::intersect() example

    <?php
    $a     = new \Ds\Set([1, 2, 3]);
    $b = new \Ds\Set([3, 4, 5]);

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

    上の例の出力は、 たとえば以下のようになります。

    object(Ds\Set)#3 (1) {
  [0]=>
  int(3)
}

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