Summary

In this chapter, we started by going back in time and reviewing the history of design patterns. We discussed why design patterns can be useful for software professionals and how we would like to organize design patterns in this book given what we have learned in the past. 

We went over several key software design principles that can be applied universally in any programming language, as it is important that we keep them in mind when developing code and applying design patterns in Julia. We covered SOLID, DRY, KISS, POLA, YAGNI, and POLP. These design principles are well known and well received by the object-oriented programming community.

Finally, we discussed some software quality objectives that we want to achieve by using design patterns. In this book, we have decided to focus on reusability, maintainability, performance, and safety objectives. We also appreciated...