August 23rd, 2023 × #Rust#JavaScript#Web Development

Rust for JS Devs — Part 2

In part 2 of Rust for JavaScript developers, Scott and Wes dive deeper into Rust's type system, talking about integer types, strings, string slices, arrays, tuples, and other collection types. They also cover defining structs, adding methods, and other fundamentals.

Show Notes Transcript

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("[email protected]"),
    username: String::from("someusername123"),
    active: true,
    sign_in_count: 1,
};

impl User {
    fn login(&mut self) {
        self.login_count += 1;
    }
}