Question

Say I have a string that contains a domain:

var domain = "http://google.com";

Each time the script runs, I would like to break this script into two parts at random.

So if I were to run it the first time, it could give me these results:

part 1: http://go
part 2: ogle.com

The second run would produce:

part 1: http://goog
part 2: le.com

at complete random each time.

How can I accomplish this?

Answer 1

Generate a random number between 0 and the string length. Grab a substring from that.

(function () {

    "use strict";

    var domain, number, pieces;

    domain = "http://google.com";
    number = Math.ceil(Math.random() * (domain.length - 1));
    pieces = [domain.substring(number, -number), domain.substring(number)];

    console.log(pieces);

}());​

Demo: http://jsfiddle.net/KTPXt/