Reference and Value type in Dart

ValueTypeSample.dart

void main() {
  List<A> baseList = [];
  baseList.add(A(value: 1, description: 'Alperen Arıcı'));
  baseList.add(A(value: 2, description: 'İsmail Özalp'));
  baseList.add(A(value: 3, description: 'Teyyihan Aksu'));
  baseList.add(A(value: 4, description: 'Alperen Ünal'));

  List<A> secondList = [];
  for (final model in baseList) {
    A cloningModel = A.clone(model);
    secondList.add(cloningModel);
  }

  secondList[0].description = 'Changing Description';
  secondList[0].value = -10;

  printList(baseList);
}

printList(List<A> modelList) {
  modelList.forEach(
      (element) => print(element.value.toString() + ' ' + element.description));
}

class A {
  int value;
  String description;

  A({this.value, this.description});

  A.clone(A source) {
    this.value = source.value;
    this.description = source.description;
  }
}