Sample code for 'Learn Dart Before You Flutter' blog post on Medium (3)

main.dart

class Order {
  int _id;
  String _reference;
  DateTime _date;
  String code; // public property
 
  Order(this._id, this._reference, this._date);
  Order.withDiscount(this._id, this._reference, {this.code}) {
    _date = new DateTime.now();
  }
  
  // Shorthand methods FTW!!!
  String getInfo() => 'Your order information:'
    '\n-------------------------------'
    '\n  Id: $_id'
    '\n  Reference: $_reference'
    '\n  Date: $_date'
    '\n-------------------------------';
  
  void printInfo() => print(getInfo());
}

void main() {
  Order order1 = new Order.withDiscount(1, 'ref1', code: 'LOVETHEWEEKEND');
  order1.printInfo();
}