Remove all dots except the first one from a string

Question

Given a string

\'1.2.3.4.5\'

I would like to get this output

\'1.2345\'

(In case there are no dots in the

Answer 1

var i = s.indexOf(".");
var result = s.substr(0, i+1) + s.substr(i+1).replace(/\./g, "");

Somewhat tricky. Works using the fact that indexOf returns -1 if the item is not found.