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CCRT - Version: 1 Clean Code and Refactoring Techniques 2 days course Description Writing clean code is an essential skill for every developer. It saves a lot of time in debugging, maintenance and bug fixing down the road. However, if we also want to be able to quickly respond to changing requirements and still keep our code clean, we must also know how to refactor it efficiently. In this course we’ll learn and practice some basic ideas of clean code and refactoring techniques, with the goal of improving these skills. Intended audience Professional developers (examples and exercises are in C#, but most content is relevant also for Java developers), architects, technical team leads Prerequisites At least 1 year experience developing software using C# or another object-oriented language Understanding of Object-Oriented concepts. Objectives Understand the importance of clean code and refactoring. Learn and practice some basic practices for clean-code. Understand the SOLID principles and the 4 rules of simple design. Understand the best practices for performing refactoring. Understand the importance of unit tests and TDD for clean code. Topics The Value of Clean Code and Refactoring Refactoring Guidelines Small steps Keep it working Use //TODOs and [Obsolete] Basic Clean Code Practices Readability: Naming, spacing Number of arguments Method length Cyclomatic Complexity Exception handling Poka-Yoke Exercise Modularity, Reuse and Design Avoid static state Law of Demeter Cohesion and Coupling Polymorphism and function pointers The SOLID principles 4 rules of simple design Specific Refactoring Techniques Using Resharper Extract/Inline methods Extract/Inline variables, fields and parameters Change method signature Extract super class/interface Pull members up/Push members down Move to another type Safe delete Code Analysis Using Resharper Go to base/derived/declaration/implementation Analyze type hierarchy Analyze project references Call tracking Value tracking Dependencies diagram Introduction to Unit Tests Unit tests structure Mock objects Limitations of unit tests Introduction to TDD The way TDD works Benefits of TDD TDD and legacy code Summary: Where to go next? Practice Pair programming / Code review Mentoring

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