109: “Code maintenance”, with special guest Nick Lockwood
Nov 22, 2021
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Special guest Nick Lockwood discusses maintaining Swift code bases, ShapeScript design, using async/await in unit tests, open source projects, and strategies for effective code maintenance. They highlight the importance of updating code bases, managing technical debt, leveraging unit tests, and adopting new language features for optimized development.
Address technical debt to maintain a healthy codebase.
Integrate maintenance tasks into regular workflows for continuous improvement.
Utilize unit tests and code reviews for ongoing code maintenance.
Deep dives
The Importance of Addressing Technical Debt in Code Maintenance
In code maintenance, addressing technical debt is crucial. Technical debt represents the necessary cleanup tasks that need to be completed before new features can be added. It involves paying off external factors-driven changes, such as platform updates or third-party dependency upgrades. Deciding when to address technical debt involves balancing the need to innovate with the need to maintain a healthy code base.
Pragmatic Approach to Refactoring for Code Maintenance
To manage technical debt effectively, a pragmatic approach to refactoring is key. Rather than setting aside large chunks of time for refactoring, integrating maintenance tasks into weekly routines can be more manageable and sustainable. Focusing on small, incremental refactoring tasks on an ongoing basis helps prevent over-engineering and ensures continuous improvement without disrupting feature development timelines.
Integration of Code Maintenance into Regular Workflows and Project Management
Integrating code maintenance tasks into regular workflows and project management strategies is essential for long-term code health. Establishing a culture of continuous maintenance helps keep technical debt in check and ensures that code remains modern and maintainable. Utilizing tools like compiler warnings, to-dos, unit tests, and documentation can help teams prioritize and address maintenance tasks effectively.
Unit Tests, Code Reviews, and Documentation in Code Maintenance
Tasks like writing unit tests, conducting code reviews, and documenting code play a vital role in ongoing code maintenance efforts. Unit tests provide confidence during refactoring tasks and help prevent regressions. Code reviews facilitate knowledge sharing and ensure code quality. Documentation helps maintain code readability and accessibility for team members, contributing to overall code health and maintainability.
Importance of Unit Tests for Maintainable Code
Unit tests are crucial for ensuring a maintainable code base in the long term. They help catch misconceptions and errors that may not be detected by tests, aiding in building a robust codebase. Implementing the pull request model for code reviews, where changes are reviewed before merging, allows for sharing knowledge and catching mistakes early. Combining unit tests and code reviews results in a streamlined review process that focuses on high-level aspects and aids in understanding the code's impact on the application as a whole.
Utilizing New System Features for Improved Codebase
Taking advantage of new system features and APIs is pivotal for code evolution and reducing maintenance efforts. Swift's new concurrency system offers opportunities to speed up code, especially in asynchronous unit tests. Using new language features should be driven by problem-solving rather than adopting features for the sake of it, ensuring that new tools are applied where they provide the most value, such as improving testing capabilities and addressing specific project needs.
Nick Lockwood joins John for a discussion about maintaining Swift code bases — from open source projects, to ones worked on by teams of various sizes. Also, the design of ShapeScript, using async/await within unit tests, and much more.
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