dry-refactoring

Code duplication elimination follows a structured DRY workflow: identify repeated logic or patterns, abstract common behavior into reusable functions or classes, replace duplicates with single calls, and verify correctness with tests. This systematic approach ensures safe, incremental refactoring.

Common duplication patterns include copy-paste code blocks, repeated logic across functions, magic numbers used identically, structural repetition in similar modules, and semantic duplicates that perform the same operation differently. The DRY workflow helps detect and eliminate all these forms.

The four-step DRY workflow ensures safety: identify duplication precisely, extract common logic incrementally, implement reusable units that replace all duplicates, then run tests to verify the refactored code behaves identically. Tests confirm correctness throughout the process.

Yes, the DRY workflow handles multiple code smell types—copy-paste patterns, magic numbers, and repeated logic—within a single refactoring pass. Abstracting common behavior eliminates these smells simultaneously while improving maintainability.

Use incremental refactoring: apply the four-step DRY workflow to isolated, high-impact duplications first, verify each refactor with tests, then expand systematically. This reduces risk and maintains verifiable correctness across your codebase.