Learn Rust 🦀

Rust is a multi-paradigm, general-purpose programming language designed for performance and safety, especially safe concurrency.

Companies and DAOs like Rated, Stacks Foundation, Solana Labs, Blocknative, Findora Foundation, Evmos, Winter, Flashbots, Fedi and Fuel Labs use Rust to work on Rated, Stacks, Blocknative, Findora, Evmos, Winter, Flashbots, Fedi, Sway and Iron Fish.

Conquer the basics of Rust here and go pro once you get the hang of it. Average salaries for Rust developers are approximately $150k-250k/yr.

Variables are declared like this:

let port: u16 = 8333; // unsigned 16-bit integer

Rust has many types (these are only some):

u8, u16, u32, u64, u128 // unsigned integers
i8, i16, i32, i64, i128 // signed integers

usize, isize // machine address sized integers

f32, f64 // floating-point numbers

bool // boolean true or false

char // unicode characters

Changing a variable will not work:

let port: u16 = 8333;
port = 8334; // error: cannot assign twice to immutable variable `port`

Because we first have to declare it as mutable:

let mut port: u16 = 8333;
port = 8334; // works now

You can drop the type and Rust will infer it:

let mut port = 8333;
port = 8334; // still works

Use an ampersand to get a reference, and a star to dereference:

let port = 8333;
let port_ref = &port;

println!("{}", *port_ref); // 8333

This is an array:

let ports = [8333, 8334, 8335];

If you need a big array, use a shorthand notation:

let ports = [0; 1000]; // 1k length filled with zeros

Arrays are not too fun because their length is part of its type and fixed at compile time. If you need a variable-length array, use a vector instead:

let mut ports = vec![8333, 8334];
ports.push(8335);

Loop through a vector using its iterator:

for port in ports.iter() {
  println!("port is: {}", port);
}

Rust has two types of strings:

let name1 = "Bitcoin";             // this is a `&str`
let name2 = "Bitcoin".to_string(); // this is a `String`

A &str is a slice that points to a valid UTF-8 sequence, whereas a String is stored as a vector of bytes that can grow:

fn print_and_return_count(name: &str) -> usize { // received as a `&str`
  println!("String is {}", name);
  name.chars().count()
}

let name = "Bitcoin".to_string(); // this is a `String`
let count = print_and_return_count(&name);

println!("{} is {} char(s) long", name, count);

// Output:
// String is Bitcoin
// Bitcoin is 7 char(s) long

Rust has the concept of ownership:

let name = "Bitcoin".to_string();
let new_name = name;

// error: the value has moved from `name` to `new_name`
println!("{}", name);

Therefore, you have to copy the value if you'd like to use it:

let name = "Bitcoin".to_string();
let new_name = name.clone();
Programming Rust: Fast, Safe Systems Development

If you'd like to go beyond the basics, here's a good read:

Programming Rust: Fast, Safe Systems Development