DRY: Don’t Repeat Yourself

The DRY principle states that “Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.”

Why DRY Matters

1. Reduces maintenance overhead
2. Minimizes bugs
3. Improves code readability
4. Makes refactoring easier

Common Anti-patterns

• Copy-paste programming
• Duplicate business logic
• Redundant data storage

Best Practices

1. Use functions and classes effectively
2. Create reusable components
3. Implement proper abstraction layers
4. Utilize design patterns