Refactoring with Design Patterns

What is refactoring? It's about improving existing code's structure without changing its external behavior. Why bring design patterns into it? Patterns offer proven, reusable solutions to common design problems, making your refactoring more systematic and effective. This leads to clearer, more maintainable, and extensible code.

Before you refactor, you need to know what to refactor. Code smells are indicators that something might be wrong in your code's design. They aren't bugs, but they can lead to them or make code harder to change.

• Long Method: A method that does too much.
• Large Class: A class with too many responsibilities.
• Duplicate Code: The same code logic appearing in multiple places.
• Conditional Complexity: Too many if/else or switch statements.