Duplication 🆓

What Is Code Duplication? Best Tools to Detect & Fix It in 2026

Logic that is identical by mistake or convenience. This is the primary target for refactoring. duplication

Once you see a definitive pattern, refactor it into a shared function or class. 3. How to Fix Duplication What Is Code Duplication

A common guideline to avoid premature abstraction is the : First time: Just solve the problem. Second time: Tolerate the duplication (copy-paste). duplication

Two pieces of code look the same now but represent different business concepts that will eventually diverge. 2. The "Rule of Three" Strategy

Similar logic that appears in different parts of a system for valid, independent reasons. Changes to one shouldn't necessarily affect the other.