Ds\Set::contains

(PECL ds >= 1.0.0)

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

说明

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

参数

values: Values to check.

返回值

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

范例

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)