Dart Lotto Picker

gistfile1.dart

// Dart code snippet to get next week's winning lottery numbers
// by taking a random guess... 
// dartbit.com

final int out_of_nbs   =  6; // Total numbers required to play.
final int number_max   = 40; // NYC lotto game (Sweet Million)
//final int number_max = 49; // CAN lotto game (The Lotto 6/49)

/*
* Returns a random [int] between 1 and [int] 'max_inclusive'.
*/
int ceil_rand (int max_inclusive) {
  return ((Math.random() * max_inclusive).ceil()).toInt();
}

/*
* Returns a new [int] that is not inside the [Set].
*/
int pick_a_number(Set the_lotto_picks) {
  int one_lotto_number = ceil_rand(number_max);
  if (the_lotto_picks.contains(one_lotto_number)) // Keep a recursion until
    one_lotto_number = pick_a_number(the_lotto_picks); // a new nb is found
  return one_lotto_number;
}

main() {
  Set the_picks = new Set();
  while (the_picks.length < out_of_nbs) the_picks.add(pick_a_number(the_picks));
  for (int this_loto_nber in the_picks) print(this_loto_nber); // Print numbers.
}