Refactoring

Refactoring is the process of restructuring existing source code — changing its internal structure — without changing its external behavior. This book introduces a systematic approach to improving code quality, readability, and maintainability through a series of well-defined refactoring techniques. Martin Fowler argues that refactoring should be a continuous, disciplined practice rather than an occasional cleanup, and he provides clear examples and a catalog of refactorings that help developers manage complexity and build more maintainable software systems.