Ds\Pair::isEmpty

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Ds\Pair::isEmptyReturns whether the pair is empty

说明

public bool Ds\Pair::isEmpty ( void )

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

Example #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)
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