There's just a little left to do before your training is complete. But before you take on a new level, here are a few articles that will help you better understand the material you've covered. Take your time and be patient: you need to read a lot.
A series of lessons on patterns
A programmer simply has to know the main patterns. Together, let's figure out the situations and problems that are solved by one pattern or another:Features of TreeMap
In this lesson, we'll talk about the features of TreeMap's implementation, and more specifically, how it differs from HashMap and how to use it correctly.