Rust

Safe systems programming

Rust gives you C++-level performance with strong memory-safety guarantees enforced by its ownership system.

Systems Programming

WebAssembly

CLI tools

Embedded

Performance-critical services

Time to learn: 3-6 months

1Hello World

beginner

Rust uses Cargo for builds and dependency management.

fn main() {
    println!("Hello, ReadmeBuddy!");
}

2Ownership Basics

intermediate

Each value has a single owner; moves transfer ownership, references borrow it.

fn main() {
    let s = String::from("hello");
    let len = take_len(&s); // borrow
    println!("{} has len {}", s, len);
}

fn take_len(s: &String) -> usize { s.len() }

3Enums & Pattern Matching

intermediate

Rust enums can carry data; match is exhaustive.

enum Shape {
    Circle(f64),
    Square(f64),
}

fn area(s: Shape) -> f64 {
    match s {
        Shape::Circle(r) => 3.14159 * r * r,
        Shape::Square(s) => s * s,
    }
}

4Result & ? Operator

advanced

Idiomatic error handling that propagates failures cleanly.

use std::fs;
use std::io;

fn read_file(path: &str) -> Result<String, io::Error> {
    let content = fs::read_to_string(path)?;
    Ok(content)
}

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