Hey everybody, it's Sarup and Paul, co-founders of CodeCrafters (YC S22).<p>Today, we're excited to launch the CodeCrafters Rust Primer.<p><a href="https://app.codecrafters.io/collections/rust-primer">https://app.codecrafters.io/collections/rust-primer</a><p>It's a free intro to Rust designed with experienced engineers in mind.<p>What problem does it solve?<p>As an experienced engineer learning a new language, you don't need yet another coding 101. You simply want to find out what's unique in the new language, and get to the actual work.<p>So we built a Rust intro that:<p>— jumps right into what's important<p>— reveals one idea at a time, with code examples<p>— can be interactively used on your phone, with "taps"<p>Why we built this?<p>Our core product CodeCrafters, is a set of interactive challenges for experienced software engineers. e.g Build your own BitTorrent, Git, Docker, or SQLite. The challenges can be done in any language, but Rust is our most popular.<p>Our customers often tend to dive right into our challenges, believing they can pick up a new language along the way.<p>They're usually right too. Except with Rust — especially with Rust — most developers realize soon enough that they could have used some introductory help.<p>When we began going through available intro resources, we saw that they were either too dense — or in trying to be beginner-friendly, they focused on motivation too much.<p>Today, we're launching our solution, a mobile-friendly, no fluff intro to Rust that respects your prior programming knowledge.<p>We're starting with 6 modules and will be releasing new modules based on feedback.<p><a href="https://app.codecrafters.io/collections/rust-primer">https://app.codecrafters.io/collections/rust-primer</a><p>We'd love for you to try it out and give us feedback. What other modules would you like to see? How can we make your mobile journey smoother? What can we explain better?
This question, module 2:<p>How would I extract the character s using indexing?<p>Doesn't have a correct answer even if you select then all in turn. It seems to have a spurious ' on the last item which I believe is supposed to be correct based on the text feedback.