var a = "daadvavda";
var b = "/[a-zA-Z]/g";
var c = a.match(b);
console(c)
// output will be null

var c = a.match(/[a-zA-Z]/g);
console(c)
//output :(9) ["d", "a", "a", "d", "v", "a", "v", "d", "a"]
// this is the output i needed