Question

i’ve made some kind of encode function that uses an array with 62 characters (a-z,A-Z,0-9)
then i use a random number to access one of these.
but if i use it, it returns way to much letters and i want as much letters as numbers (which is also logical since the chance on a number is 10/62 versus 50/62)
could someone tell me some function that generates a random number but that has a higher chance to get a value between 52-62 then a value below 52.

Answer 1

This gives you a 50/50 chance of getting a digit:

var letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
var digits = "0123456789";

function getRandomChar() {
  var r = Math.random();
  return r < 0.5 ? letters.charAt(Math.floor(r*letters.length*2)) : digits.charAt(Math.floor((r-0.5)*digits.length*2));
}