[手动选题][tech]: 20220830 Some ways to get better at debugging.md

sources/tech/20220830 Some ways to get better at debugging.md

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+[#]: subject: "Some ways to get better at debugging"
+[#]: via: "https://jvns.ca/blog/2022/08/30/a-way-to-categorize-debugging-skills/"
+[#]: author: "Julia Evans https://jvns.ca/"
+[#]: collector: "lkxed"
+[#]: translator: " "
+[#]: reviewer: " "
+[#]: publisher: " "
+[#]: url: " "
+
+Some ways to get better at debugging
+======
+Hello! I’ve been working on writing a zine about debugging for a while (here’s [an early draft of the table of contents][1]).
+
+As part of that I thought it might be fun to read some academic papers about
+debugging, and last week [Greg Wilson][2] sent me some
+papers about academic research into debugging.
+
+One of those papers ([Towards a framework for teaching debugging
+[paywalled]][3]) had a
+categorization I really liked of the different kinds of knowledge/skills we
+need to debug effectively. It comes from another more general paper on
+troubleshooting: [Learning to Troubleshoot: A New Theory-Based Design Architecture][4].
+
+I thought the categorization was a very useful structure for thinking about how
+to get better at debugging, so I’ve reframed the five categories in the paper
+into actions you can take to get better at debugging.
+
+Here they are:
+
+#### 1. learn the codebase
+
+To debug some code, you need to understand the codebase you’re working with.
+This seems kind of obvious (of course you can’t debug code without
+understanding how it works!).
+
+This kind of learning happens pretty naturally over time, and actually
+debugging is also one of the best ways to *learn* how a new codebase works –
+seeing how something breaks helps you learn a lot about how it works.
+
+The paper calls this “System Knowledge”.
+
+#### 2. learn the system
+
+The paper mentions that you need to understand the programming language, but I
+think there’s more to it than that – to fix bugs, often you need to learn a
+lot about the broader environment than just the language.
+
+For example, if you’re a backend web developer, some “system” knowledge you
+might need includes:
+
+* how HTTP caching works
+* CORS
+* how database transactions work
+
+I find that I often have to be a bit more intentional about learning systemic
+things like this – I need to actually take the time to look them up and read
+about them.
+
+The paper calls this “Domain Knowledge”.
+
+#### 3. learn your tools
+
+There are lots of debugging tools out there, for example:
+
+* debuggers (gdb etc)
+* browser developer tools
+* profilers
+* strace / ltrace
+* tcpdump / wireshark
+* core dumps
+* and even basic things like error messages (how do you read them properly)
+
+I’ve written a lot about debugging tools on this blog, and definitely
+learning these tools has made a huge difference to me.
+
+The paper calls this “Procedural Knowledge”.
+
+#### 4. learn strategies
+
+This is the fuzziest category, we all have a lot of strategies and heuristics
+we pick up along the way for how to debug efficiently. For example:
+
+* writing a unit test
+* writing a tiny standalone program to reproduce the bug
+* finding a working version of the code and seeing what changed
+* printing out a million things
+* adding extra logging
+* taking a break
+* explaining the bug to a friend and then figuring out what’s wrong halfway through
+* looking through the github issues to see if anything matches
+
+I’ve been thinking a lot about this category while writing the zine, but I want
+to keep this post short so I won’t say more about it here.
+
+The paper calls this “Strategic Knowledge”.
+
+#### 5. get experience
+
+The last category is “experience”. The paper has a really funny comment about this:
+
+> Their findings did not show a significant difference in the strategies
+employed by the novices and experts. Experts simply formed more correct
+hypotheses and were more efficient at finding the fault. The authors suspect
+that this result is due to the difference in the programming experience between
+novices and experts.
+
+This really resonated with me – I’ve had SO MANY bugs that were really
+frustrating and difficult the first time I ran into them, and very straightforward
+the fifth or tenth or 20th time.
+
+This also feels like one of the most straightforward categories of knowledge to
+acquire to me – all you need to do is investigate a million bugs, which is our
+whole life as programmers anyway :). It takes a long time but I feel like it
+happens pretty naturally.
+
+The paper calls this “Experiential Knowledge”.
+
+#### that’s all!
+
+I’m going to keep this post short, I just really liked this categorization and
+wanted to share it.
+
+--------------------------------------------------------------------------------
+
+via: https://jvns.ca/blog/2022/08/30/a-way-to-categorize-debugging-skills/
+
+作者：[Julia Evans][a]
+选题：[lkxed][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://jvns.ca/
+[b]: https://github.com/lkxed
+[1]: https://twitter.com/b0rk/status/1562480240240525314?s=20&t=BwKd6i0mVCTaCud2HDEUBA
+[2]: https://third-bit.com/
+[3]: https://dl.acm.org/doi/abs/10.1145/3286960.3286970
+[4]: https://www.researchgate.net/profile/Woei-Hung/publication/225547853_Learning_to_Troubleshoot_A_New_Theory-Based_Design_Architecture/links/556f471c08aec226830a74e7/Learning-to-Troubleshoot-A-New-Theory-Based-Design-Architecture.pdf