GoF Design Patterns

The theory from the course has finally caught up with practice: factories, strategies, observers and decorators are no longer pictures from a book but working tools in real projects. Together with DI, the patterns clicked into a coherent picture — I started to understand not just the "how" but also the "when not to".

In the software engineering course we learn about the Gang of Four design patterns. Understanding what they are and why — that worked out; how to actually apply them — not so much.