ThinkPHP/Library/Org/Util/ArrayList.class.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;