Flutter Part 2: with Dart

Instructon of Dart

Get basic idea of both flutter and dart: - Flutter with Dart - Flutter for web developers

var by Type

Dart build-in types:

• String variableSting
• int variableNumber
• double variableNumberWithFloat
• bool booleanType
• List listVariableFromClass

• etc…

  String myName;              // myName = 'Esther'
  int number;                 // number = 1
  double numberFloat;         // numberFloat = 4.12
  bool isHot;                 // isHot = true
  List<int> numberArray;      // numberArray = [1, 2, 3, ...]
  List<String> stringArray;   // stringArray = ['a', 'b', 'c', ...]

See all build-in types on Dart doc.

📌 Know more about Generics in Dart

Pokers by Dart

• All dart need main()

• Object-oriented with Class

  void main() {
  var deck = new Deck();
  deck.shuffle();
  print(deck.deal(5));
  }
  
  class Deck {
  List<Card> cards = [];
  
  Deck() {
  var suits = ['Daimonds', 'Hearts', 'Clubs', 'Spades'];
  var ranks = ['Ace', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'];
  
  for (var s in suits) {
    for (var r in ranks) {
      var card = new Card(
        rank: r,
        suit: s,
      );
      cards.add(card);
    }
  }
  }
  
  toString() {
  return cards.toString();
  }
  
  shuffle() {
  cards.shuffle();
  }
  
  cardsWithSuit(String suit) {
  return cards.where((card) => card.suit == suit);
  }
  
  deal(int handSize) {
  var hand = cards.sublist(0, handSize);
  cards = cards.sublist(handSize);
  return hand;
  }
  
  removeCard(String suit, String rank) {
  cards.removeWhere((card) => (card.suit == suit) && (card.rank == rank));
  }
  }
  
  class Card {
  String suit;
  String rank;
  
  Card({this.rank, this.suit});
  
  toString() {
  return '$rank of $suit';
  }
  }