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Crust of Rust: Lifetime Annotations

Jon Gjengset · 299.1K views · 2020-04-22 · 1:33:23

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Overview

In this first Crust of Rust episode, Jon Gjengset live-codes an example that needs multiple explicit lifetime annotations. Along the way he covers string types and generics over a custom trait.

On Hacker News

Recommended as a slow-paced, detailed live-coding session that makes lifetimes click once you are past Rust basics.

Recommended by 3 HN people across 3 months · HN mentions 2020–2023

Topics

C, C++, Rust, Go & systems languagesProgramming language design
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rustlifetimeslive codingstringsgenerics

What people said

tialaramex · 2022-09 · Recommendation

So, with "good working knowledge" of C++ and Swift, you probably aren't going to have too much trouble with the basics, if anything you might worry that there's some subtlety which you're missing when actually nope, whatever just seemed easy maybe actually was that easy. [ For example move really is as simple as Rust makes it look, it is a headache in C++ because they added it to a finished working language ] Several people suggested books/ web pages let me suggest some videos: Jon Gjengset's "Crust of Rust" Youtube videos are good once you reach the point where you can write more than "Hello, world!" with some confidence but certain specific things aren't clicking. [VIDEO] For example, Jon does a whole video on lifetime annotations, which are something you won't see in most popular languages, but also one on Rust's iterators, which are a familiar concept from both C++ and Swift but don't work quite like either (they're very different from C++ iterators, your Swift experience will help more). I recommend watching specifically a handful on topics you don't feel you understood well, although you could watch all of them especially if you just enjoy Jon's style and have the free time. They're not fast paced, if you wanted "Rust in 60 minutes" this is not that, but each one is actually writing carefully chosen code that runs and talking through what's going on, not just clicking through slides.

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ashish01 · 2020-09 · Recommendation

I also used to feel the same way. But listening to [0]Crust of Rust: Lifetime Annotations by Jon Gjengset helped me understand its need. [0] [VIDEO] really helped me understand it.

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harikb · 2020-06 · Recommendation

Anecdotal - One of favorite YouTube live-streaming personalities, Jon Gjengset[1] is a Ph.D student at MIT CSAIL. His talks are very detailed[4] and captivating[3] [1] [LINK] Talks [2] [LINK] [3] [LINK] Rust Details(my favorites) [4] [VIDEO]

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Sources

Video by Jon Gjengset, played through YouTube.

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