Ds\Pair::isEmpty
(No version information available, might only be in Git)
Ds\Pair::isEmpty — Returns whether the pair is empty
说明
public Ds\Pair::isEmpty(): bool
Returns whether the pair is empty.
参数
此函数没有参数。
返回值
Returns true
if the pair is empty, false
otherwise.
范例
示例 #1 Ds\Pair::isEmpty() example
<?php
$a = new \Ds\Pair("a", 1);
$b = new \Ds\Pair();
var_dump($a->isEmpty());
var_dump($b->isEmpty());
?>
以上例程的输出类似于:
bool(false) bool(true)

User Contributed Notes
There are no user contributed notes for this page.