IN Javascript, replace all after second existence of a character or replace all between two characters

Question

javascript, what is the best way to replace following two scenario. It is possible to use replace and add regex to do this, if yes, how?

I want to convert "aaa.bbb.ccc" TO  "aaa.bbb.*"
I want to convert "aaa.bbb.ccc.ddd.eee" TO "aaa.bbb.*.ddd.*"

Answer 1

var map = 'qwertyuiopasdfghjklzxcvbnm'.split('');
var rand = function(){
    var len = map.length,
        arr = [],
        i;
    for (i = 0; i < 3; i++){
        arr.push(map[Math.floor(Math.random()*len)]);
    }
    return arr.join('');
};
var randStr = [rand(), rand()];

/* ASSUME above code is how you get random string */

var string = 'aaa.bbb.' + randStr[0] + '.ddd.' + randStr[1];

// use new RegExp() to parse string as regular expression
var regexp = new RegExp(randStr[0] + '|' + randStr[1], 'gi');

console.log(string.replace(regexp, '*'));

Read more about new RegExp() here (easy one), here (detailed one) and here (working example).

You should be able to apply this concept in your code now.