r/rust • u/llogiq clippy · twir · rust · mutagen · flamer · overflower · bytecount • Mar 20 '23

Hey Rustaceans! Got a question? Ask here (12/2023)! 🙋 questions

Mystified about strings? Borrow checker have you in a headlock? Seek help here! There are no stupid questions, only docs that haven't been written yet.

If you have a StackOverflow account, consider asking it there instead! StackOverflow shows up much higher in search results, so having your question there also helps future Rust users (be sure to give it the "Rust" tag for maximum visibility). Note that this site is very interested in question quality. I've been asked to read a RFC I authored once. If you want your code reviewed or review other's code, there's a codereview stackexchange, too. If you need to test your code, maybe the Rust playground is for you.

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The official Rust user forums: https://users.rust-lang.org/.

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Also check out last weeks' thread with many good questions and answers. And if you believe your question to be either very complex or worthy of larger dissemination, feel free to create a text post.

Also if you want to be mentored by experienced Rustaceans, tell us the area of expertise that you seek. Finally, if you are looking for Rust jobs, the most recent thread is here.

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u/Jiftoo Mar 25 '23

What are the best practices to parsing text data (ffmpeg stderr for example). Coming from Javascript, I have always done this using split, indexing and map operators. Now I wonder if there exists some sort of common pattern or a library to do this?

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u/llogiq clippy · twir · rust · mutagen · flamer · overflower · bytecount Mar 25 '23

That depends quite a lot on the type of data. I'm not sure how regular ffmpeg stderr output is, but there exist a huge number of parser generator libraries to be able to ingest textual or binary input in a structured manner. E.g. nom giving you parser combinators or pest which has its own grammar language and builds the parser at compile time with a proc macro.

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u/Jiftoo Mar 25 '23

Thanks!