Ds\Vector::isEmpty
(PECL ds >= 1.0.0)
Ds\Vector::isEmpty — Returns whether the vector is empty
说明
public Ds\Vector::isEmpty(): bool
Returns whether the vector is empty.
参数
此函数没有参数。
返回值
Returns true
if the vector is empty, false
otherwise.
范例
示例 #1 Ds\Vector::isEmpty() example
<?php
$a = new \Ds\Vector([1, 2, 3]);
$b = new \Ds\Vector();
var_dump($a->isEmpty());
var_dump($b->isEmpty());
?>
以上例程的输出类似于:
bool(false) bool(true)
add a note
User Contributed Notes
There are no user contributed notes for this page.