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PHP

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