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deepmind.google·6d ago
AI Engineering
Lobsters·Jun 22·5 min read
Chesterton's middle finger
TL;DR
A lack of documentation and comments in code can lead to misunderstandings when making changes. The Chesterton's fence analogy warns against altering code without understanding its original purpose.
✦ Why It Matters
Engineers should prioritize documentation and clear commit messages to facilitate understanding and maintenance of code.
Key Takeaways
- Document code changes thoroughly to provide context.
- Use clear and descriptive commit messages.
- Encourage code comments to explain complex logic.
- Review existing code before making modifications.
Full Summary
Chesterton's fence analogy emphasizes the need to understand existing systems before making changes, as there may be valid reasons for their design. In a specific case, a codebase accumulated 295 lines of commit messages over 13 years, with many entries being vague and uninformative.
After filtering out irrelevant commits, only 167 lines remained, averaging about one line per month. The code also lacked documentation and comments, making it difficult for others to grasp the rationale behind certain decisions.
This scenario illustrates a common pitfall in software engineering where developers may inadvertently disrupt functioning code due to insufficient context. The findings suggest that better documentation practices could prevent future complications and enhance collaboration among engineers.