When you've identified harmful duplication, follow these steps to consolidate it safely:
Once you see a definitive pattern, refactor it into a shared function or class. 3. How to Fix Duplication duplication
Similar logic that appears in different parts of a system for valid, independent reasons. Changes to one shouldn't necessarily affect the other. Changes to one shouldn't necessarily affect the other
In software development, occurs when the same logic or data is repeated across multiple parts of a codebase . While often viewed as a "code smell" that increases technical debt, strategic duplication can sometimes be better than a poorly designed abstraction. 1. Types of Duplication When you've identified harmful duplication
Two pieces of code look the same now but represent different business concepts that will eventually diverge. 2. The "Rule of Three" Strategy
What Is Code Duplication? Best Tools to Detect & Fix It in 2026