type script replace举例

   var a = "(ddd)";
        a = a.replace(/\(|\)/g, "");
        console.debug(a);//全局替换 ddd
        a = "(ddd)";
        a = a.replace(/\(|\)/, "");//只能替换到前面的()
        console.debug(a);//  ddd)
        var a = "(ddd)";
        a = a.replace("(", "");//非正则表达式替换 
        console.debug(a);//  ddd)