SplDoublyLinkedList::count()函數是PHP中的內置函數,用於計算雙鏈表中存在的元素數。
用法:
int SplDoublyLinkedList::count( void )
參數:它不包含任何參數。
返回值:它返回雙向鏈表中存在的元素數。
以下示例程序旨在說明PHP中的SplDoublyLinkedList::count()函數:
示例1:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList;
// Use SplDoublyLinkedList::add() function to
// add elements to the SplDoublyLinkedList
$list->add(0, 30);
$list->add(1, 20);
$list->add(2, 30);
$list->add(3, "Geeks");
$list->add(4, 'G');
// Use SplDoublyLinkedList::count() function
// to return number of elements
print_r($list->count());
?>
輸出:
5
示例2:
<?php
// Declare an empty SplDoublyLinkedList
$list = new \SplDoublyLinkedList;
// Use SplDoublyLinkedList::push() function to
// add elements to the SplDoublyLinkedList
$list->push(1);
$list->push(2);
$list->push(3);
$list->push(8);
$list->push(5);
// Use SplDoublyLinkedList::count() function
// to return number of elements
print_r($list->count());
?>
輸出:
5
參考: https://www.php.net/manual/en/spldoublylinkedlist.count.php
相關用法
- PHP SplDoublyLinkedList add()用法及代碼示例
- PHP SplDoublyLinkedList pop()用法及代碼示例
- PHP SplDoublyLinkedList top()用法及代碼示例
- PHP SplDoublyLinkedList key()用法及代碼示例
- PHP SplDoublyLinkedList next()用法及代碼示例
- PHP SplDoublyLinkedList bottom()用法及代碼示例
- PHP SplDoublyLinkedList unshift()用法及代碼示例
- PHP SplDoublyLinkedList rewind()用法及代碼示例
- PHP SplDoublyLinkedList prev()用法及代碼示例
- PHP SplDoublyLinkedList push()用法及代碼示例
- PHP SplDoublyLinkedList shift()用法及代碼示例
- PHP SplDoublyLinkedList __construct()用法及代碼示例
- PHP SplDoublyLinkedList unserialize()用法及代碼示例
- PHP SplDoublyLinkedList valid()用法及代碼示例
- PHP SplDoublyLinkedList offsetGet()用法及代碼示例
注:本文由純淨天空篩選整理自jit_t大神的英文原創作品 PHP | SplDoublyLinkedList count() function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。