Nav
duplication

Duplication Apr 2026

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

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

Logic that is identical by mistake or convenience. This is the primary target for refactoring. In software development, occurs when the same logic

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

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