Refactoring: Ruby Edition

在此摘抄官方的介绍： This book will help you 这本书会帮助你: • Understand the core principles of refactoring and the reasons for doing it 理解重构的核心原则以及为什么要这么做 • Recognize “bad smells” in your Ruby code 发现你 Ruby 代码中的 "bad smells" • Rework bad designs into well-designed code, one step at a time 一步一个脚印的修复恶劣设计 • Build tests to make sure your refactorings work properly 测试驱动重构 • Understand the challenges of refactoring and how they can be overcome 认识重构会面临的挑战以及如何克服 • Compose methods to package code properly 运用 package 的思想来重构 methods • Move features between objects to place responsibilities where they fit best 优化对象设计，封装职责 • Organize data to make it easier to work with 组织数据，让它更好的被调用 • Simplify conditional expressions and make more effective use of polymorphism 利用多态来简化选择逻辑 • Create interfaces that are easier to understand and use 设计简单易用的接口 • Generalize more effectively 更有效的简化 • Perform larger refactorings that transform entire software systems and may take months or years 大型系统的重构 • Successfully refactor Ruby on Rails code 成功的重构 ROR 代码