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241 lines
5.7 KiB
PHP
241 lines
5.7 KiB
PHP
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<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Org\Util;
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/**
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* ArrayList实现类
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* @category Think
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* @package Think
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* @subpackage Util
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* @author liu21st <liu21st@gmail.com>
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*/
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class ArrayList implements \IteratorAggregate {
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/**
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* 集合元素
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* @var array
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* @access protected
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*/
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protected $_elements = array();
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/**
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* 架构函数
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* @access public
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* @param string $elements 初始化数组元素
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*/
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public function __construct($elements = array()) {
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if (!empty($elements)) {
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$this->_elements = $elements;
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}
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}
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/**
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* 若要获得迭代因子,通过getIterator方法实现
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* @access public
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* @return ArrayObject
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*/
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public function getIterator() {
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return new ArrayObject($this->_elements);
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}
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/**
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* 增加元素
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* @access public
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* @param mixed $element 要添加的元素
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* @return boolean
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*/
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public function add($element) {
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return (array_push($this->_elements, $element)) ? true : false;
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}
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//
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public function unshift($element) {
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return (array_unshift($this->_elements,$element))?true : false;
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}
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//
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public function pop() {
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return array_pop($this->_elements);
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}
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/**
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* 增加元素列表
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* @access public
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* @param ArrayList $list 元素列表
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* @return boolean
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*/
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public function addAll($list) {
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$before = $this->size();
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foreach( $list as $element) {
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$this->add($element);
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}
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$after = $this->size();
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return ($before < $after);
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}
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/**
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* 清除所有元素
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* @access public
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*/
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public function clear() {
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$this->_elements = array();
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}
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/**
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* 是否包含某个元素
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* @access public
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* @param mixed $element 查找元素
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* @return string
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*/
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public function contains($element) {
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return (array_search($element, $this->_elements) !== false );
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}
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/**
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* 根据索引取得元素
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* @access public
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* @param integer $index 索引
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* @return mixed
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*/
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public function get($index) {
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return $this->_elements[$index];
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}
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/**
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* 查找匹配元素,并返回第一个元素所在位置
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* 注意 可能存在0的索引位置 因此要用===False来判断查找失败
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* @access public
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* @param mixed $element 查找元素
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* @return integer
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*/
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public function indexOf($element) {
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return array_search($element, $this->_elements);
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}
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/**
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* 判断元素是否为空
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* @access public
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* @return boolean
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*/
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public function isEmpty() {
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return empty($this->_elements);
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}
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/**
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* 最后一个匹配的元素位置
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* @access public
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* @param mixed $element 查找元素
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* @return integer
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*/
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public function lastIndexOf($element) {
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for ($i = (count($this->_elements) - 1); $i > 0; $i--) {
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if ($element == $this->get($i)) { return $i; }
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}
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}
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public function toJson() {
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return json_encode($this->_elements);
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}
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/**
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* 根据索引移除元素
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* 返回被移除的元素
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* @access public
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* @param integer $index 索引
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* @return mixed
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*/
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public function remove($index) {
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$element = $this->get($index);
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if (!is_null($element)) { array_splice($this->_elements, $index, 1); }
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return $element;
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}
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/**
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* 移出一定范围的数组列表
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* @access public
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* @param integer $offset 开始移除位置
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* @param integer $length 移除长度
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*/
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public function removeRange($offset , $length) {
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array_splice($this->_elements, $offset , $length);
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}
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/**
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* 移出重复的值
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* @access public
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*/
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public function unique() {
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$this->_elements = array_unique($this->_elements);
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}
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/**
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* 取出一定范围的数组列表
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* @access public
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* @param integer $offset 开始位置
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* @param integer $length 长度
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*/
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public function range($offset,$length=null) {
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return array_slice($this->_elements,$offset,$length);
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}
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/**
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* 设置列表元素
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* 返回修改之前的值
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* @access public
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* @param integer $index 索引
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* @param mixed $element 元素
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* @return mixed
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*/
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public function set($index, $element) {
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$previous = $this->get($index);
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$this->_elements[$index] = $element;
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return $previous;
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}
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/**
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* 获取列表长度
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* @access public
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* @return integer
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*/
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public function size() {
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return count($this->_elements);
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}
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/**
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* 转换成数组
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* @access public
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* @return array
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*/
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public function toArray() {
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return $this->_elements;
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}
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// 列表排序
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public function ksort() {
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ksort($this->_elements);
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}
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// 列表排序
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public function asort() {
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asort($this->_elements);
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}
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// 逆向排序
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public function rsort() {
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rsort($this->_elements);
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}
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// 自然排序
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public function natsort() {
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natsort($this->_elements);
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}
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}
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