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Rust's For Loop Is Smarter Than You Think | Advanced Rust Part 12

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Source: Advanced Rust
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  • description: To try everything Brilliant has to offer—free—for a full 30 days, visit https://brilliant.org/GreenTeaCoding/ . You’ll also get 20% off an annual premium subscription. Watch the rest of this series: https://www.youtube.com/playlist?list=PLFdNoRgzggbr7tkQsO4VrF1UGy0ji9sZl New to Rust? Check out my fundamentals series: https://www.youtube.com/playlist?list=PLFdNoRgzggbo6BqJQ6tqk_wvXeI5yfbGA Rust's for loop looks simple — but under the hood, it's a masterclass in trait design. In this video, we break down how `for item in &vec` actually works, why `IntoIterator` is implemented on references, and what this teaches us about designing our own traits. We'll also unpack the desugaring of for loops, explain why `Deref` isn't enough to make iteration work on references, and highlight a key insight: how trait method receivers (`self` vs `&self`) change everything about how implementations behave — and why that’s a feature, not a limitation. Whether you're curious about auto-borrowing, reference-based trait impls, or just love seeing how elegant Rust’s internals are, this episode delivers. ⏱️ Perfect for intermediate-to-advanced Rust devs who want to sharpen their understanding of ownership, iteration, and trait design. Find me elsewhere: 🐘 Mastodon: https://mastodon.social/@GreenTeaCoding #rustlang #advancedrust #rustprogramming #forloop #intorust #rusttraits #rustiterators #ownership #zerocostabstractions Chapters: 00:00 Desugaring the for loop 02:15 Ownership vs Borrowing 03:12 Brilliant Sponsorship 04:33 IntoIterator 06:04 Vec's IntoIterator 08:31 Impl on &T 11:12 Outro This video was sponsored by Brilliant
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