powerball_generator.dart

/// A stupid little Powerball number generator.
/// http://www.powerball.com/powerball/pb_howtoplay.asp

import 'dart:math';

void main() {
  int timesToPlay = 20;
  
  Powerball.playMultiple(timesToPlay);
}

class Powerball {
  static Random rnd = new Random();
  
  /// Play once.
  static void play() {
    List numbers = [];
  	int numbersNeeded = 5;
  
    // Loop until we have 5 unique, random numbers 1-69.
    while (numbers.length < numbersNeeded) {
      // Pick a random number, shifted by 1 to ensure it's never 0.
      int number = 1 + rnd.nextInt(69 - 1);
      // Only add to our list of 5 numbers if it's not already there.
      if (!numbers.contains(number)) numbers.add(number);
    }

    // Sort in consecutive order because order doesn't matter.
    numbers.sort();

    // Pick a random Powerball number, 1-26, shifted
    // by 1 to ensure it's never 0.
    int powerBall = 1 + rnd.nextInt(26 - 1);

    print('(${numbers.join(') (')}) (($powerBall))');
  }
  
  /// Play multiple times.
  static void playMultiple(int timesToPlay) {
  	for (var i = 0; i < timesToPlay; i++) Powerball.play();  
  }
}