Ds\Set::contains

    (PECL ds >= 1.0.0)

    Ds\Set::contains — Determines if the set contains all values

    说明

    public Ds\Set::contains(mixed ...$values): bool

    Determines if the set contains all values.

    注意:

    Values of type object are supported. If an object implements Ds\Hashable, equality will be determined by the object's equals function. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.

    警告

    All comparisons are strict (type and value).

    参数

    values

    Values to check.

    返回值

    false if any of the provided values are not in the set, true otherwise.

    示例

    示例 #1 Ds\Set::contains() example

    <?php
    $set     = new \Ds\Set([1, 2, 3]);

    var_dump($set->contains(1)); // true
    var_dump($set->contains(1, 2)); // true
    var_dump($set->contains(...[1, 2])); // true

    var_dump($set->contains("1")); // false
    var_dump($set->contains(...[1, 2, 3, 4])); // false

    var_dump($set->contains(...[])); // true
    ?>

    以上示例的输出类似于：

    bool(true)
bool(true)
bool(true)
bool(false)
bool(false)
bool(true)

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