code: function generateAnotherInt(err, int) {
                    if (err) return callback(err)
  
                    if (ints.indexOf(int) > -1) {
                      // we already found that random number, run callback to make the loop again
                      callback()
                    } else {
                      // replace the integer in that position and run the loop again
                      ints[position] = int
                      callback()
                    }
                  }
docs: eslint-disable-next-line no-shadow