How do you assess your level of knowledge and experience with the BLoC architectural pattern?

BLoC (Business Logic Component) — an architectural pattern widely used in Flutter for separating business logic and UI. It is based on data streams and reactive programming.

The pattern allows:

• To separate logic from widgets.
• To manage state through streams of events and states.
• To ensure testability and reusability of code.

A typical BLoC includes:

• Input events (Sink), which the UI sends to the BLoC.
• A stream of states (Stream), which the UI subscribes to for interface updates.

Example of a simple BLoC:

class CounterBloc {
  final _counterController = StreamController<int>();
  int _counter = 0;

  Stream<int> get counterStream => _counterController.stream;

  void increment() {
    _counter++;
    _counterController.sink.add(_counter);
  }

  void dispose() {
    _counterController.close();
  }
}

I use BLoC to manage state in medium-complexity applications where it is important to clearly separate logic and UI, as well as to simplify testing of business logic.