Ds\Vector::isEmpty

(PECL ds >= 1.0.0)

Ds\Vector::isEmptyReturns 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

Example #1 Ds\Vector::isEmpty() example

<?php
$a 
= new \Ds\Vector([123]);
$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)

User Contributed Notes

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