DRY Principle

The DRY (Don't Repeat Yourself) principle is a software development concept that emphasizes avoiding duplication of code, logic, or data. It states that every piece of knowledge or logic should have a single, unambiguous representation within a system. This principle aims to reduce redundancy, improve maintainability, and minimize errors by centralizing functionality.

Also known as: Don't Repeat Yourself, DRY, DRY principle, Avoid duplication, Single source of truth

Why learn DRY Principle?

Developers should apply the DRY principle to reduce code duplication, which simplifies maintenance, debugging, and updates by ensuring changes only need to be made in one place. It is particularly useful in large-scale projects, refactoring efforts, and when building reusable components or libraries to enhance consistency and efficiency.

Learning Resources

• book: The Pragmatic Programmer: Your Journey to Mastery
• docs: DRY Principle - Wikipedia
• video: DRY (Don't Repeat Yourself) Principle Explained
• tutorial: Codecademy: Learn the DRY Principle
• docs: GeeksforGeeks: DRY Principle in Software Engineering