Duplication -

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

When you've identified harmful duplication, follow these steps to consolidate it safely: 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

Once you see a definitive pattern, refactor it into a shared function or class. 3. How to Fix Duplication How to Fix Duplication Logic that is identical

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

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