Programming Concepts Intermediate

What is Refactoring?

Restructuring existing code without changing its external behavior to improve readability, maintainability, and performance.

Refactoring improves code quality without altering functionality. Common refactoring operations include extracting methods, renaming variables, removing duplication, simplifying conditionals, and breaking up large classes.

Automated tests are essential for safe refactoring — they verify behavior remains unchanged after restructuring. IDEs provide automated refactoring tools. Martin Fowler's "Refactoring" book is the definitive guide.

Learn More About This Topic

Mastering Python Object-Oriented Programming

Closely related

Clean Python Code: Best Practices for Writing Maintainable and Readable Python

Closely related

Java Programming for Complete Beginners

Related reading

Related Terms

Functional Programming

A programming paradigm that treats computation as the evaluation of mathematical functions, avoiding state changes and mutable data.

A mathematical notation that describes the worst-case performance of an algorithm as input size grows.

Singleton Pattern

A design pattern that restricts a class to a single instance and provides a global point of access to that instance.

SOLID Principles

Five design principles for writing maintainable, flexible object-oriented code: Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.

SOLID Principles Breakdown

Five object-oriented design principles that guide developers in creating maintainable, flexible, and scalable software systems.

Version Control

A system that records changes to files over time, allowing you to recall specific versions, collaborate, and track history.

View All Programming Concepts Terms →