Getting started with Rust

I believe that, from time to time, it is interesting to learn a new language or framework that takes us out of our comfort zone. So I decided to learn Rust (Ok! I confess I was influenced by Ayende).

Why Rust?

Programs written in Rust are blazingly fast and memory-efficient. Rust programs are memory-safe and thread-safe. Also, the compiler is excellent and help us to fix bugs quickly.

Another good reason? Hundreds of companies have adopted rust.

Finally, it is nice to learn a language that ~~really~~ challenges C++.

How to start?

If like me, you know nothing about Rust, I strongly recommend you to read the excellent “The Rust Programming Language” book which is available for free online.

The first chapter will teach you how to get it and to write your first program.

The following code comes from the book, by the way.

use std::io;
use std::cmp::Ordering;
use rand::Rng;

fn main() {
    println!("Guess the number!");

    let secret_number = rand::thread_rng().gen_range(1, 101);

    loop {
        println!("Please input your guess.");

        let mut guess = String::new();

        io::stdin().read_line(&mut guess)
            .expect("Failed to read line");

        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,
        };

        println!("You guessed: {}", guess);

        match guess.cmp(&secret_number) {
            Ordering::Less => println!("Too small!"),
            Ordering::Greater => println!("Too big!"),
            Ordering::Equal => {
                println!("You win!");
                break;
            }
        }
    }
}

Even simple, this program shows features that I loved like immutability, variable name shadowing, pattern matching and more.