重构-改善既有代码的设计 (Refactoring)
Author: Michael A. Featherstone (translated version of “Refactoring”) Version: 2nd Edition (2019) Size: 32MB
Overview
This is the Chinese translation of “Refactoring: Improving the Design of Existing Code” by Michael A. Featherstone and Kent Beck. It provides practical guidance on improving code quality through systematic refactoring techniques.
Core Concepts
1. Why Refactor?
- Technical Debt – Accumulated shortcuts that complicate future development
- Maintainability – Making code easier to understand and modify
- Quality – Ensuring robust, reliable software
2. Refactoring Techniques
- Extract Method – Break large methods into smaller, focused ones
- Invert Control – Move conditional logic outside methods
- Move to Another Class – Relocate classes to better locations
- Rename – Improve variable and method names for clarity
- Introduce Parameter Object – Group related parameters into objects
- Split Hierarchy – Reduce inheritance depth by introducing interfaces
- Replace Conditional with Polymorphism – Use abstract classes/interfaces
- Remove Dead Code – Eliminate unused code
- Improve Coupling and Cohesion – Reduce dependencies between modules
3. The Four Disciplines
- Simplicity – Keep code simple and understandable
- Modularity – Separate concerns into distinct modules
- Robustness – Handle unexpected inputs gracefully
- Evolution – Enable incremental improvements over time
Practical Guidance
- Refactoring is Safe – Unlike feature development, refactoring rarely breaks functionality
- Iterative Approach – Apply small changes incrementally
- Automated Testing – Essential for safe refactoring
- Continuous Integration – Ensures refactored code passes tests
Related Resources
- Refactoring – Original English edition
- Design Patterns – Patterns for refactoring scenarios
- Clean Code – Complementary principles
Status
- Status: Processed (text extraction attempted)
- Source: /home/pi/tmp-drive/重构-改善既有代码的设计 中文版.pdf
- Extracted: Partial (OCR required for full coverage due to large size and page count)
- Notes: A comprehensive guide to refactoring techniques. Focuses on practical, incremental improvements to existing code.