Deck of cards in Dart

main.dart

void main() {
  Deck deck = new Deck();

  print(deck.length());
  deck.removeCard("Jack", "Hearts");
  print(deck.length());
  print(deck);
}

class Deck {
  List<Card> cards = [];

  Deck() {
    List ranks = [
      "Ace",
      "King",
      "Queen",
      "Jack",
      "10",
      "9",
      "8",
      "7",
      "6",
      "5",
      "4",
      "3",
      "2"
    ];
    List suits = ["Hearts", "Spades", "Diamonds", "Clubs"];

    for (String suit in suits) {
      for (String rank in ranks) {
        cards.add(new Card(rank: rank, suit: suit));
      }
    }
  }

  String toString() {
    return cards.toString();
  }

  void shuffle() {
    cards.shuffle();
  }

  List<Card> cardsWithSuit(String suit) {
    return (cards.where((Card card) => card.suit == suit)).toList();
  }

  Hand deal(int handSize) {
    List<Card> handContents = this.cards.sublist(0, handSize);
    this.cards.removeRange(0, handSize);

    return new Hand(handContents);
  }

  void removeCard(String rank, String suit) {
    cards.removeWhere((Card card) => (card.suit == suit && card.rank == rank));
  }

  int length() {
    return cards.length;
  }
}

class Card {
  String rank;
  String suit;

  Card({this.rank, this.suit});

  String toString() {
    return "$rank of $suit";
  }
}

class Hand {
  List<Card> hand = [];

  Hand(this.hand);

  String toString() {
    return hand.toString();
  }
}