Teiva Harsanyi

@teivah

Go & Rust developer | 📖 100 Go Mistakes author | Reliability, Observability, Performance | Blog | 改善

Paris
teivah.io
Tilmeldt januar 2010
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  1. Fastgjort tweet
    27. dec. 2021

    I've completed the first final draft of my book 100 Go Mistakes. I've also published a repo containing all the source code for anyone interested:

    1 svar 33 retweets 185 likes
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  2. 19. mar.

    Starting to experience the dark side of writing a book with an editor...

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  3. retweetede
    18. mar.

    Your mistakes don't define who you are. It's what you do after you have made the mistakes that makes all the difference. Every mistake you make is a learning experience. They don't make you less capable. But it's how you correct them or learn from them that defines you.

    51 svar 1.603 retweets 6.229 likes
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  4. 15. mar.

    For more information: $ go work Or the Github issue:

    1 like
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  5. 15. mar.

    5. Workspace mode In an attempt to provide better support for monorepos, Go 1.18 introduces a workspace mode. Projects that rely on the workspace mode will have a new file referencing the modules of the project:

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  6. 15. mar.

    4. Try lock sync.Mutex and sync.RWMutex are given new methods for trying to acquire a lock and report whether it succeeded: - sync.Mutex => TryLock() - sync.RWMutex => TryLock() and TryRLock() Compared to Lock() and RLock(), these functions are not blocking

    1 svar 1 retweet 1 like
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  7. 15. mar.

    3. Cut In the strings and bytes packages, a new Cut function is now available. Given a string (or a []byte) and a prefix, it returns: - The text before the separator - The text after the separator - Whether the separator was found

    2 svar 2 likes
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  8. 15. mar.

    When using Go 1.18, let's keep an eye on the GC behavior of our application and make sure everything is still running smoothly. As always, tweaking GOGC remains the only available option to tune the GC. The new design:

    1 svar
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  9. 15. mar.

    2. GC & Pacer The pacer is the algorithm used to determine when to start a new GC cycle. It has been redesigned to include not only heap data but also other sources such as the stack. As a result, it may, in some cases, help the GC to be more predictable.

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  10. 15. mar.

    The engine has found a vulnerability that led the function to panic. It has created a unique file in /testdata containing the inputs that lead to a failure: string("0") // s string("00") // prefix More info here:

    1 svar
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  11. 15. mar.

    We wrote a custom fuzz test with a given seed corpus (basically, a guide for the fuzz engine). Then, we can run the test: $ go test -fuzz FuzzHasPrefix --- FAIL: FuzzHasPrefix (0.04s) testing.go:1349: panic: runtime error: slice bounds out of range [:2] with length 1

    1 svar
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  12. 15. mar.

    Sometimes, it can be quite cumbersome trying to think by ourselves about all the different cases to be tested. Fuzzing is here to help us with that:

    1 svar 1 like
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  13. 15. mar.

    1. Fuzz testing Fuzzing is about passing random data to functions in an attempt to find vulnerabilities or crash-causing inputs. Imagine the following scenario where we have to implement a custom function to test whether a string starts with a prefix:

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  14. 15. mar.

    🧵 Go 1.18 got released 🥳. Outside of generics, five new features we should be aware of. 👇

    1 svar 1 retweet 10 likes
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  15. 15. mar.

    It's coming

    1 retweet 4 likes
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  16. retweetede
    8. jun. 2021

    Elon Musk often talks about hiring job candidates for “clear evidence of exceptional ability” But how do you identify exceptional potential employees? 13 non-obvious habits to look for in hiring high performing employees:

    226 svar 2.199 retweets 8.914 likes
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  17. retweetede
    11. mar.

    In software development learning is not a big part of the job. It is the job.

    13 svar 453 retweets 1.715 likes
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  18. retweetede
    11. mar.

    They are also working on government-issued SSL certificates. This already happened in Kazakhstan in 2015: Basically it allows someone to intercept, decrypt, modify and encrypt back all the traffic.

    98 svar 383 retweets 3.421 likes
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  19. retweetede
    9. mar.

    Have found talk: Mechanical Sympathy in (CC: ) Amazing slides btw!

    1 svar 3 retweets 15 likes
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  20. 9. mar.

    Naming IS designing.

    1 retweet
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  21. retweetede
    9. mar.

    Prevention vs Cure

    24 svar 1.175 retweets 4.789 likes
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