Working effectively with legacy code

This book provides comprehensive strategies for working with large, untested legacy code bases.

It covers topics such as understanding the mechanics of software change, adding features, fixing bugs, improving design, and optimizing performance.

The book emphasizes the importance of adding tests before making changes, breaking dependencies, and using techniques like characterization tests to ensure the existing behavior of the code is preserved.

It includes a catalog of dependency-breaking techniques and is particularly tailored for developers working with languages like Java and C++.