What are some common code smells and their examples?

What are some common code smells I should be aware of?

Common code smells include long methods, large classes, and duplicated code. Would you like examples of each?

Yes, please provide examples for long methods and duplicated code.

A long method might have too many lines of code, making it hard to understand. For example, a method that handles user input, processes data, and updates the UI all in one go. Duplicated code occurs when the same code block appears in multiple places, like having the same validation logic in different classes.

How can I refactor these code smells?

You can refactor long methods by breaking them into smaller, more focused methods. For duplicated code, consider creating a utility function that can be reused.