js实现String.Fomat的实例代码

String.Format = function (str) {
  for (var i = 1; i < arguments.length; i++) {
    var parent = "\\{" + (i - 1) + "\\}";
    var reg = new RegExp(parent, "g")
    str = str.replace(reg, arguments[i]);
  }
  return str;
}

string.Format("<span>您的答案是：<b>{0}</b></span>", remark);

str += string.Format(temp, data[i].Item2, data[i].Item1);