Rust

When to Use

• Systems programming (drivers, OS)
• WebAssembly
• Performance-critical applications
• Command-line tools (great developer experience)

Quick Start

fn main() {
    println!("Hello, World!");

    let mut x = 5; // mutable
    x = 6;

    let y = 10; // immutable by default
}

Core Concepts

Ownership & Borrowing

• Each value has a single owner.
• You can have multiple immutable borrows OR one mutable borrow, but not both simultaneously.

Lifetimes

Traits

Best Practices

• Embrace the borrow checker (it's your friend)
• Use

  Result<T, E>

  and

  Option<T>

  for error handling
• Use

  cargo clippy

  for linting
• Use

  match

  for exhaustive pattern matching

• Use

  unsafe

  unless absolutely necessary

• unwrap()

  in production code (use proper error handling)

References

• The Rust Programming Language Book
• Rust by Example