Rust for JS Devs — Part 2

In this episode of Syntax, Wes and Scott jump into part 2 of their look at Rust for JavaScript developers, including variables in Rust, type systems in Rust, signed and unsigned integers, and more. Show Notes • 00:10 • Welcome • 00:43 • Audio issue bugs • 03:17 • Building decks • 06:06 • Variables in Rust • Syntax 647: Rust for JavaScript Developers - Node vs Rust Concepts let x = 5; // x is immutable let mut x = 5; // x is mutable const MAX_POINTS: u32 = 100_000; // must be defined at compile time • 10:42 • Type System in Rust • 15:52 • Types in Rust • 19:06 • Why does Rust have signed and unsigned integers? • 23:35 • Slicing strings with &str • 27:35 • enum • 27:55 • struct • 28:19 • Vec • 29:33 • HashMap and HashSet • 33:00 • Converting Signed to Unsigned Numbers let unsigned_value: u8 = 200; let signed_value: i8 = unsigned_value as i8; • 36:12 • What’s up with &str? • 43:31 • Rust error messages • 45:28 • What is a Struct? struct User { username: String, email: String, sign_in_count: u64, active: bool, } // You can create an instance of a struct like this: let user1 = User { email: String::from("someone@example.com"), username: String::from("someusername123"), active: true, sign_in_count: 1, }; impl User { fn login(&mut self) { self.login_count += 1; } } • 49:17 • SIIIIICK ××× PIIIICKS ××× ××× SIIIIICK ××× PIIIICKS ××× • Scott: Thermacell Patio Shield • Wes: Magnet Phone Mount Shameless Plugs • Scott: Sentry • Wes: Wes Bos Tutorials Tweet us your tasty treats • Scott’s Instagram • LevelUpTutorials Instagram • Wes’ Instagram • Wes’ Twitter • Wes’ Facebook • Scott’s Twitter • Make sure to include @SyntaxFM • in your tweets • Wes Bos on Bluesky • Scott on Bluesky • Syntax on Bluesky