PHP如何使用Ds\Deque __construct()函数（用法实例） _JavaDeque接口

Ds\Deque::__ construct()函数是PHP中的内置函数, 用于创建新实例。
语法如下：

Ds\Deque::__construct( $values )

参数：该函数接受单个参数$值包含可遍历的对象或数组以使用初始值。
下面的程序说明了Ds\Deque::__ construct()PHP中的功能：
程序1：

< ?php // Declare a deque $deq = new \Ds\Deque(); // Display the elements of deque echo ( "Elements of first deque:\n" ); var_dump( $deq ); // Declare a deque $deq = new \Ds\Deque([10, 20, 30, 40, 50, 60]); // Display the elements of deque echo ( "\nElements of second deque:\n" ); var_dump( $deq ); ?>

输出如下：

Elements of first deque: object(Ds\Deque)#1 (0) { }Elements of second deque: object(Ds\Deque)#2 (6) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(40) [4]=> int(50) [5]=> int(60) }

程式2：

< ?php // Declare a deque $deq = new \Ds\Deque([ "geeks" , "for" , "geeks" ]); // Display the elements of deque echo ( "Elements of first deque:\n" ); print_r( $deq ); // Declare a deque $deq = new \Ds\Deque([ 'G' , 'E' , 'E' , 'K' , 'S' , 1, 2, 3]); // Display the elements of deque echo ( "\nElements of second deque:\n" ); print_r( $deq ); ?>

输出如下：

Elements of first deque: Ds\Deque Object ( [0] => geeks [1] => for [2] => geeks )Elements of second deque: Ds\Deque Object ( [0] => G [1] => E [2] => E [3] => K [4] => S [5] => 1 [6] => 2 [7] => 3 )

【PHP如何使用Ds\Deque __construct()函数（用法实例）】参考： https://www.php.net/manual/en/ds-deque.construct.php