Summary

In this chapter, we covered many architectural principles. We began by exploring the five SOLID principles and their importance in modern software engineering to then jump to the DRY and separation of concerns principles, which add some more guidance to the mix. By following those principles, you should be able to build better, more maintainable software. As we also covered, principles are only principles, not laws. You must always be careful not to abuse them so they remain helpful instead of harmful. The context is always important; internal tools and critical business apps require different levels of tinkering. Try not to over-engineer everything.

With all of those principles in our toolbox, we are now ready to jump into design patterns and get our designing level one step further! In the next few chapters, we explore how to implement some of the most frequently used GoF patterns and how those are applied at another level with dependency injection. Dependency injection...