Part 2: Essence of Refactoring and Good Code

Going through code, especially old code, is a big part of a software developer’s job. There are certain warning signs, like “red flags,” that professionals should notice right away. Recognizing and avoiding these issues is an important skill, and in this section, we’ll understand how to spot them.

Now that we’ve learned what refactoring is and why it’s important, let’s explore a crucial requirement. Refactoring isn’t safe unless you have really good test coverage. We’ll find out why having thorough tests is essential.

Next, how do you actually refactor your code? There are some common techniques that can be very helpful. We’ll learn how to master them.

After that, we’ll delve into metaprogramming. Instead of manually changing code, metaprogramming techniques can automatically analyze and refactor it. For example, metaprogramming can generate code, replace...