Ds\Stack::isEmpty

(PECL ds >= 1.0.0)

Ds\Stack::isEmpty — Returns whether the stack is empty

说明

public Ds\Stack::isEmpty ( void ) : bool

Returns whether the stack is empty.

参数

此函数没有参数。

返回值

Returns TRUE if the stack is empty, FALSE otherwise.

范例

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

<?php
$a = new \Ds\Stack([1, 2, 3]);
$b = new \Ds\Stack();

var_dump($a->isEmpty());
var_dump($b->isEmpty());
?>

以上例程的输出类似于：

bool(false)
bool(true)
相关文章
php collection returns whether the collection is emptyphp deque returns whether the deque is emptyphp map returns whether the map is emptyphp pair returns whether the pair is emptyphp priorityqueue returns whether the queue is emptyphp queue returns whether the queue is emptyphp set returns whether the set is emptyphp stack returns the number of values in the stackphp stack returns whether the stack is emptyphp stack returns a representation that can be converted to jsonphp vector returns whether the vector is emptyphp apd 函数 returns the current call stack as an arrayphp maxdb 函数 returns whether thread safety is given or notphp svn 函数 creates a new empty directory returns true if all is ok false otherwisephp svn 函数 creates a new empty file returns true if all is ok false otherwisephp phar returns whether phar has global meta dataphp reflectionparameter returns whether parameter must be callablephp solrquery returns whether or not stats is enabledphp spldoublylinkedlist returns whether the requested $index existsphp sqlite3stmt returns whether a statement is definitely read only
关注编程学问公众号