Ds\Set::contains

(PECL ds >= 1.0.0)

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

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

Determines if the set contains all values.

Note:

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.

Caution

All comparisons are strict (type and value).

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values

Values to check.

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FALSE if any of the provided values are not in the set, TRUE otherwise.

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Example #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
?>

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