Introduction to Refactoring: Spotting Code Smells and Writing Tests

Maintaining messy or complex code can slow down development and introduce unexpected bugs. Refactoring allows you to improve internal code quality and readability without altering external application behavior. This text-based course provides a clear foundation for recognizing bad code patterns and making safe code improvements. You will learn how to: - Understand foundational refactoring concepts, terminology, and safety guidelines - Identify common code smells like duplicate code, long functions, and large classes - Write unit tests to create a safety net before making structural changes - Apply core refactoring techniques such as function extraction and variable renaming - Utilize static analysis and linter tools to maintain clean code standards The course begins with fundamental definitions and concepts before guiding you through structured text explanations and code examples. It is tailored for beginner developers and programmers who want to write more maintainable software with no prior refactoring experience required. Begin reading today to build confidence in improving existing codebases.