js formatString 格式化字符串

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/*     函数:格式化字符串     参数：str:字符串模板； data:数据     调用方式:formatString("api/values/{id}/{name}",{id:101,name:"test"});              formatString("api/values/{0}/{1}",101,"test"); */ function formatString(str, data) {     if (!str || data == undefined) {         return str;     }       if (typeof data === "object") {         for (var key in data) {             if (data.hasOwnProperty(key)) {                 str = str.replace(new RegExp("\{" + key + "\}", "g"), data[key]);             }         }     } else {         var args = arguments,             reg = new RegExp("\{([0-" + (args.length - 1) + "])\}", "g");         return str.replace(reg, function(match, index) {             return args[index - (-1)];         });     }     return str; }