A simple card shuffle in Dart

cardShuffle.dart

// Example borrowed from http://algs4.cs.princeton.edu/
class cardShuffle {

  String _cards;
  
  cardShuffle() {
  }

  void run() {
    _cards = "2C 3C 4C 5C 6C 7C 8C 9C 10C JC QC KC AC " +
              "2D 3D 4D 5D 6D 7D 8D 9D 10D JD QD KD AD " +
              "2H 3H 4H 5H 6H 7H 8H 9H 10H JH QH KH AH " +
              "2S 3S 4S 5S 6S 7S 8S 9S 10S JS QS KS AS";
    
    List<String> cards = _cards.split(' ');
    
    f(var l) {
      String s = "";
      for(var c in l) {
        s += (c + " ");
      }
      print(s);
    }
    
    f(cards);
    
    int N = cards.length;
    for (int i = 0; i<N; i++) {
      int r = i + (Math.random() * (N - i)).toInt();
      String swap = cards[r];
      cards[r] = cards[i];
      cards[i] = swap;
    }
   
    f(cards);
  }
}

void main() {
  new cardShuffle().run();
}

I like! I wrote a solitaire game a while back for Silverlight and used a list swapping technique for the shuffle:

List<String> cards = new List<String>();
List<String> swapCards = _cards.split(' ');

while(!swapCards.isEmpty()){
  int r = (Math.random() * swapCards.length).toInt();
  cards.add(swapCards[r]); 
  swapCards.removeRange(r, 1);
 }

About the same lines of code but slightly fewer math operations, although perhaps trading off with the list operations.