DIV CSS 佈局教程網

     其實很簡單，我這部分代碼，前一部分是簡單的實現如何使用JS寫模板，第二個就是具體的實現了JSON查詢的一個擴展。

     以後查詢Json就有了利器了。
復制代碼 代碼如下:
/*
         * 定義模板函數
        */
        var template = function (queryArr) {

            var count = 0;

            for (var i = 0; i < queryArr.length; i++) {

                var e = queryArr[i];

                if ($express) {
                    count++;
                }
            }

            return count;
        }

        /*
         * 模板創建函數
        */
        var createIntance = function (exp) {
            var fun = template.toString().replace("$express", exp).toString();
            return eval("0," + fun);
        }

        var testTodo = function () {

            var testArr = [
                { name: "張三", age: 20 },
                { name: "李四", age: 25 },
                { name: "王二麻子", age: 28 },
                { name: "小張", age: 30 }
            ];

            var func = createIntance("e.age>=25");

            alert(func(testArr));
        }

        /****************** JS 實現 JSON查詢 **********************/

        // 定義常用的函數
        var len = function (s) { return s.length; }
        var left = function (s, n) { return s.substr(0, n); }
        var right = function (s, n) { return s.substr(-n); }
        var index = function (s, find) { return s.indexOf(find) + 1; }

        // 擴展原型方法
        var _proto = Object.prototype;

        // 緩存,解決快速查找
        var _cache = {};

        // 擴展運算符
        var _alias = [
            /@/g, "_e.",
            /AND/gi, "&&",
            /OR/gi, "||",
            /<>/g, "!=",
            /NOT/gi, "!",
            /([^=<>])=([^=]|$)/g, '$1==$2'
        ];

        var _rQuote = /""/g;
        var _rQuoteTemp = /!~/g;

        // 編譯
        var _complite = function (code) {
            return eval("0," + code);
        }

        // 將擴展符號轉換成標准的JS符號
        var _interpret = function (exp) {
            exp = exp.replace(_rQuote,"!~");
            var arr = exp.split('"');
            var i, n = arr.length;
            var k = _alias.length;

            for (var i = 0; i < n; i += 2) {
                var s = arr[i];
                for (var j = 0; j < k; j += 2) {
                    if (index(s, _alias[j]) > -1) {
                        s = s.replace(_alias[j], _alias[j + 1]);
                    }
                }
                arr[i] = s;
            }

            for (var i = 1; i < n; i += 2) {
                arr[i] = arr[i].replace(_rQuoteTemp, '\\"');
            }
            return arr.join('"');
        }

        // 定義模函數
        var _templ = function (_list) {
            var _ret = [];
            var _i = -1;

            for (var _k in _list) {
                var _e = _list[_k];
                if (_e != _proto[_k]) {
                    if ($C) {
                        _ret[++_i] = _e;
                    }
                }
            }
            return _ret;
        } .toString();

        // 擴展查詢的方法
        _proto.Query = function (exp) {
            if (!exp) {
                return [];
            }

            var fn = _cache[exp];

            try {
                if (!fn) {
                    var code = _interpret(exp);
                    code = _templ.replace("$C", code);
                    fn = _cache[exp] = _complite(code);
                }
                return fn(this);
            } catch (e) {
                return [];
            }
        }

        var doTest = function () {

            var heros = [
            // 名============攻=====防=======力量====敏捷=====智力====
                {name: '冰室女巫', DP: 38, AP: 1.3, Str: 16, Dex: 16, Int: 21 },
                { name: '沉默術士', DP: 39, AP: 1.1, Str: 17, Dex: 16, Int: 21 },
                { name: '娜迦海妖', DP: 51, AP: 6.0, Str: 21, Dex: 21, Int: 18 },
                { name: '賞金獵人', DP: 39, AP: 4.0, Str: 17, Dex: 21, Int: 16 },
                { name: '劇毒術士', DP: 45, AP: 3.1, Str: 18, Dex: 22, Int: 15 },
                { name: '光之守衛', DP: 38, AP: 1.1, Str: 16, Dex: 15, Int: 22 },
                { name: '煉金術士', DP: 49, AP: 0.6, Str: 25, Dex: 11, Int: 25 }
            //...
            ];

            var match = heros.Query('@Str>20 AND @Dex>20');
            ShowResult(match[0]);

            // 查詢：“士”結尾的
            // 結果：沉默術士,劇毒術士,煉金術士
            var match = heros.Query('right(@name,1)="士"');
            ShowResult(match[0]);
        }

        function ShowResult(result) {
            alert(result.name + " " + result.DP + " " + result.AP + " " + result.Str + " " + result.Dex + " " + result.Int);
        }

     代碼就是這樣了。歡迎大家拍磚，或者可以提出新的想法。我們一起來擴展