Factory in Fautter

learn_factory.dart

// Ref : https://theburningmonk.com/2013/09/dart-implementing-the-singleton-pattern-with-factory-constructors/

class CommonClass {
  CommonClass() {
    print("Init : CommonClass");
  }
  String namaDev;

  String get getNamaDev {
    return namaDev;
  }

  set setName(String value) {
    namaDev = value;
  } 
}

class FactoryClass {
  static final FactoryClass _singleton = new FactoryClass._internal();

  factory FactoryClass() {
    return _singleton;
  }

  String namaDev;

  String get getNamaDev {
    return namaDev;
  }

  set setName(String value) {
    namaDev = value;
  }

  FactoryClass._internal() {
    this.namaDev = "Anto";
    print("Init : FactoryClass");
  }
}
// class FactoryClass {
//   String namaDev;

//   String get getNamaDev {
//     return namaDev;
//   }

//   set setName(String value) {
//     namaDev = value;
//   }
// }

main(List<String> args) {
  FactoryClass fc1 = new FactoryClass();
  print(fc1.getNamaDev);
  fc1.setName = "hehe";
  print(fc1.getNamaDev);

  FactoryClass fc2 = new FactoryClass();
  print(fc2.getNamaDev);
  FactoryClass fc3 = new FactoryClass();
  print(fc3.getNamaDev);
  print(fc1.getNamaDev);
  FactoryClass fc4 = new FactoryClass();

  CommonClass cc1 = new CommonClass();
  CommonClass cc2 = new CommonClass();
  CommonClass cc3 = new CommonClass();
}