Dart cascade operator (..)

dart_cascade_operator_exam.dart

void main(){
	var movie = Movie();
	movie..showCount()
		..showCount()
		..showCount();
	
	var last = movie..minusCount()
		..minusCount()
		..minusCount();
	print('last:$last');
}

class Movie {
	int count = 0;
	void showCount() => print('count:${count++}');
	
	int minusCount() {
		print('count:${count--}');
		return count;
	}
}