(PECL ds >= 1.0.0)
Ds\Set::contains — Determines if the set contains all values
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
equalsfunction. If an object does not implement Ds\Hashable, objects must be references to the same instance to be considered equal.
All comparisons are strict (type and value).
valuesValues to check.
false if any of the provided values are not in the
set, true otherwise.
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
?>
以上例程的输出类似于：
bool(true) bool(true) bool(true) bool(false) bool(false) bool(true)