Dart allows callback functions but also provides the Future and Completer pair of types that work together to provide a future value that can be passed around your app . Only when the async call completes does the future value get a real value.
Dart allows callback functions but also provides the Future and Completer pair of types that work together to provide a future value that can be passed around your app . Only when the async call completes does the future value get a real value.