PHP Ds Deque count()函数

Ds\Deque::count()函数可以用于获取Deque中元素的数量。

语法

public Ds\Deque::count( void ) : int

Ds\Deque::count()函数没有任何参数。该函数返回Deque中的元素数量。

示例1

<?php 
   deque = new \Ds\Deque([1, 2, 3, 4, 5]);   echo("The elements in the deque: \n");   print_r(deque); 

   echo("\n The number of elements in the deque: "); 
   print_r($deque->count()); 
?>

示例2

<?php 
   deque = new \Ds\Deque(["Tutorials", "Point", "Tutorix"]);   echo("The elements in the deque: \n");   print_r(deque); 

   echo("\n The number of elements in the deque: "); 
   print_r($deque->count()); 
?>