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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.

Wes Bos

Wes Bos Host

Scott Tolinski

Scott Tolinski Host

or
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

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 ×××

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