Refactoring: The Art of Cleaning the Floor While Walking
The text discusses the importance of refactoring, which corrects code deterioration by improving internal structure without altering external behavior. Refactoring is not about rewriting the system but optimizing design and readability, as shown through replacing magic numbers with constants and the "Extract Method" technique. It reduces cognitive load, prevents the accumulation of technical debt, and represents professionalism. Refactoring should be done when adding features, fixing bugs, or during code reviews. Tests are crucial to ensure that refactoring does not break functionalities. Refactoring should be a constant habit.