Daily Rust @rustoftheday

Daily tips & tricks for Rust 🦀 programming. Following back all accounts with 🦀 or 🐪 in their profile. Joined November 2023

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Daily Rust @rustoftheday

7 months ago

@NeoSmart What is a better alternative?

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Want true pub-sub semantics in Rust? The Bus crate gives you SP→MC broadcast semantics. Crossbeam’s MPSC supports multiple consumers, but it round-robins messages, not exactly what you want for fan-out. crates.io/crates/bus

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Daily Rust @rustoftheday

7 months ago

@nother_pleb Agree to using it as a safety net, but not as a primary way of handling errors.

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Daily Rust @rustoftheday

7 months ago

🦀 #Rust Tip #119: Some folks suggest using std::panic::catch_unwind as a solution to the recent unwrap() panic that stopped the internet. In my opinion this is an anti-pattern, some thoughts: - bypasses memory safety constraints (e.g., panic in unsafe block)

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Daily Rust @rustoftheday

7 months ago

@_Felipe Great idea if you want to jump straight into undefined behavior. One of the tenets in Rust is to prevent undefined behavior. In the case of unhandled errors (unrwap()) the sound option is to stop execution. There is unwrap_or_default() though...

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Daily Rust @rustoftheday

7 months ago

#119 (contd.) - imposes runtime cost by stack walking - encourages using panic for control flow - many APIs are not unwind-safe - cannot catch "fatal" errors such as out-of-memory

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William Saar @saarw

7 months ago

You generally want a Clippy linter like this one in your Rust production code

AstraKernel 💫 @AstraKernel

7 months ago

🦀 Bad news everyone - unwrap() is the reason behind cloudflare outage >The FL2 Rust code that makes the check and was the source of the unhandled error is shown below blog.cloudflare.com/18-november-20…

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Daily Rust @rustoftheday

7 months ago

@LundukeJournal We should note it wasn't a memory issue but unsound handling of an error state.

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Daily Rust @rustoftheday

7 months ago

@deviant_studio @grok They were basically calling a function that either returns a successful result or an error. Production code would normally handle the error case. Calling unwrap() will panic and halt execution if there was an error.

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Daily Rust @rustoftheday

7 months ago

Don't use unwrap() in your production code, boys and girls! 😃

Tim McNamara @timClicks

7 months ago

Cloudflare generated many millions of HTTP 5XX responses today. They were triggered because code in a core proxy called .unwrap() on a Result for an operation that was expected to never fail.

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Daily Rust @rustoftheday

7 months ago

@ChShersh @jino_rohit the naked pointers burn the eye

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Daily Rust @rustoftheday

7 months ago

@renzocarbonara are you referring to "fat enums" 🤣😇?

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Daily Rust @rustoftheday

7 months ago

🦀 #Rust Tip #118: Result::and_then lets us chain operations that return Result, bypassing nested pattern matching. Although the ? operator often accomplishes the same, and_then allows us to remain in a more functional "combinator style".

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8 months ago

Animate anything with Rust 🦀 🌀 KramaFrame — A simple, generic, and flexible keyframe animation library. ⚡ Manage multiple animations, apply easing functions, and map progress to any range. 🐁 Includes a terminal demo w/ @ratatui_rs ⭐ GitHub: github.com/CosmoBunny/kra… #rustlang #animation #library #programming #terminal #ratatui #tui

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Daily Rust @rustoftheday

7 months ago

@yotstack There is a .then() method for async futures in Rust as well, but mostly .await is sufficient.

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Orhun Parmaksız 👾 @orhundev

8 months ago

This is gold if you're using async Rust 💯 🌀 channels-console — A TUI dashboard for inspecting std/tokio/futures/crossbeam channels. 📊 Watch messages, queue depth, throughput & memory usage live. 🦀 Written in Rust & built with @ratatui_rs ⭐ GitHub: github.com/pawurb/channel… #rustlang #ratatui #tui #async #concurrency #tokio #debugging

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Daily Rust @rustoftheday

7 months ago

@ChShersh I see what you are doing 😀Just give in to the urge and switch to #rustlang

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Daily Rust @rustoftheday

8 months ago

@barettorein @axiosopher Not sure I follow 100%, if statements don't need round parens, for example. Also, try a C++ closure auto add = [&sum](int v){ sum += v; }; ampersand and all types of possible parens Rust: let mut add = |v| { total += v; };