Refactoring Patterns

Systematically improve code without changing its behavior.

The Refactoring Workflow

1. Identify a code smell or pain point
2. Ensure you have tests (write them first if not)
3. Apply one refactoring at a time
4. Test after each change (green = continue, red = revert)
5. Commit — small, focused, descriptive
6. Repeat

Extract Method

When: A method does multiple things or is too long. How: Find a cohesive block → extract to new method → call it.