Category · Computer Science

Code that is easy to read and change

SOLID, DRY, KISS, YAGNI, clean code, design patterns. The principles interviewers ask about and the ones that save a project a year later. The first 5 lessons are available now. The course is planned for about 10: next come composition over inheritance, more patterns (adapter, decorator, singleton and why it is often a smell), code smells and refactoring, tests as feedback on design, separation of concerns and layers.

5 lessons65 min

Topics, each as its own lesson

01DRY, KISS, YAGNIDemo

Three short rules that remove half of the extra code, and the case where DRY hurts.

12 min02SOLID, part 1: S and O

One reason to change per module, and extension without editing old code.

12 min03SOLID, part 2: L, I, D

Subtypes that don't break expectations, narrow interfaces and depending on abstractions.

14 min04Clean code: names, functions, comments

Code is read ten times more often than it is written. Three habits that make it clear.

12 min05Design patterns: strategy, factory, observer

Three patterns that show up in every project, even when nobody calls them that.

15 min

0/5 topics open. This is the course intro, not the whole course on one page.