Refactoring_ImprovingtheDesignofExisting.epub

Refactoring: Improving the Design of Existing Code Martin Fowler Kent Beck John Brant William Opdyke Don Roberts Boston • San Francisco • New York • Toronto • Montreal London • Munich • Paris • Madrid Capetown • Sydney • Tokyo • Singapore • Mexico City Table of Contents Copyright Foreword Preface What Is Refactoring? What's in This Book? Who Should Read This Book? Building on the Foundations Laid by Others Acknowledgments Chapter 1. Refactoring, a First Example The Starting Point The First Step in Refactoring Decomposing and Redistributing the Statement Method Replacing the Conditional Logic on Price Code with Polymorphism Final Thoughts Chapter 2. Principles in Refactoring Defining Refactoring Why Should You Refactor? Refactoring Helps You Find Bugs When Should You Refactor? What Do I Tell My Manager? Problems with Refactoring Refactoring and Design Refactoring and Performance Where Did Refactoring Come From? Chapter 3. Bad Smells in Code Duplicated Code Long Method Large Class Long Parameter List Divergent Change Shotgun Surgery Feature Envy Data Clumps Primitive Obsession Switch Statements Parallel Inheritance Hierarchies ......