code-refactoring

Code refactoring improves code readability and maintainability by identifying and applying various refactoring techniques. It restructures existing code to reduce complexity without changing its external behavior or output.

You should avoid refactoring code when there are no established principles or clear code smells justifying the changes. Refactoring should be skipped if you lack adequate testing to ensure the program's behavior remains unaltered.

To fix common code smells like long methods and nested conditionals, apply specific refactoring techniques such as Extract Method or Replace Conditional with Polymorphism. These patterns systematically simplify complex code structures.

Safe code refactoring requires a structured approach emphasizing thorough testing and incremental, small changes. Following a dedicated refactoring checklist ensures you maintain functionality and readability throughout the process.

To apply the Extract Method technique, identify a block of code inside a method that performs a single, isolated task. Create a new method for this block and replace the original code with a call to the new method.