var heros = [// 名============攻=====防=======力量====敏捷=====智力===={name:'冰室女巫', DP:38, AP:1.3, Str:16, Agi:16, Int:21},{name:'沉默术士', DP:39, AP:1.1, Str:17, Agi:16, Int:21},{name:'娜迦海妖', DP:51, AP:6.0, Str:21, Agi:21, Int:18},{name:'赏金猎人', DP:39, AP:4.0, Str:17, Agi:21, Int:16},{name:'剧毒术士', DP:45, AP:3.1, Str:18, Agi:22, Int:15},{name:'光之守卫', DP:38, AP:1.1, Str:16, Agi:15, Int:22},{name:'炼金术士', DP:49, AP:0.6, Str:25, Agi:11, Int:25}//...];

    var match = heros.filter(function(e) {return e.DP > 40 && e.AP < 4;});

    var match = heros.select('@DP>40 AND @AP<4');

    /*** 模版: tmplCount* 功能: 统计arr数组中符合$express表达式的数量*/function tmplCount(arr) {var count = 0;for(var i = 0; i < arr.length; i++) {var e = arr[i];if($express) {count++;}}return count;}

    /*** 函数: createInstance* 参数: exp*      一段js表达式字符串，用来替换tmplCount模板的$express* 返回：*      返回一个Function，模版tmplCount的实例*/function createInstance(exp){// 替换模板内的表达式var code = tmplCount.toString().replace('$express', exp);// 防止匿名函数直接eval报错var fn = eval('0,' + code);// 返回模板实例return fn;}// 测试参数var student = [{name: 'Jane', age: 14},{name: 'Jack', age: 20},{name: 'Adam', age: 18}];// demo1var f1 = createInstance('e.age<16');alert(f1(student));    //1个// demo2var f2 = createInstance('e.name!="Jack" && e.age>=14');alert(f2(student));    //2个

    var __proto = Object.prototype;//
    // 模板: __tmpl// 参数: $C// 说明: 记录并返回_list对象中匹配$C的元素集合//
    var __tmpl = function(_list) {var _ret = [];var _i = -1;for(var _k in _list) {var _e = _list[_k];if(_e && _e != __proto[_k]) {if($C)_ret[++_i] = _e;}}return _ret;}.toString();

    //
    // select方法实现//
    var __cache = {};__proto.select = function(exp) {if(!exp)return [];var fn = __cache[exp];try {if(!fn) {var code = __interpret(exp);            //解释表达式code = __tmpl.replace('$C', code);      //应用到模版
fn = __cache[exp] = __compile(code);    //实例化函数
            }return fn(this);                            //查询当前对象
        }catch(e) {return [];}}

    function __compile() {return eval('0,' + arguments[0]);}

    var heros = [// 名============攻=====防=======力量====敏捷=====智力===={name:'冰室女巫', DP:38, AP:1.3, Str:16, Agi:16, Int:21},{name:'沉默术士', DP:39, AP:1.1, Str:17, Agi:16, Int:21},{name:'娜迦海妖', DP:51, AP:6.0, Str:21, Agi:21, Int:18},{name:'赏金猎人', DP:39, AP:4.0, Str:17, Agi:21, Int:16},{name:'剧毒术士', DP:45, AP:3.1, Str:18, Agi:22, Int:15},{name:'光之守卫', DP:38, AP:1.1, Str:16, Agi:15, Int:22},{name:'炼金术士', DP:49, AP:0.6, Str:25, Agi:11, Int:25}//...];

    // 查询：力量，敏捷 都超过20的// 结果：娜迦海妖var match = heros.select('@Str>20 AND @Agi>20');// 查询：“士”结尾的// 结果：沉默术士,剧毒术士,炼金术士var match = heros.select('right(@name,1)="士" ');// 查询：生命值 超过500的// 结果：炼金术士var match = heros.select('100 + @Str*19 > 500');