Rust Programming Tutorials, Guides & Best Practices

Actix Web is a powerful, pragmatic, and extremely fast web framework for Rust. It is built on top of the Actix actor framework and supports the development of web applications with features like routing, middleware, and request handling.

Key Features:

let s1 = String::from("hello");
let s2 = s1; // s1 is now invalid

• Clone:

• tokio and async-std provide async runtimes and utilities for managing asynchronous tasks.
• They make it easy to handle multiple asynchronous operations concurrently.

To demonstrate the power of Rust’s async programming model, we’ll build a simple web crawler that fetches and processes web pages concurrently. This example will utilize tokio and reqwest to handle the asynchronous tasks.

• Ownership and Functions: Passing and returning ownership to manage resource lifecycles.
• Smart Pointers: Using types like Box, Rc, and RefCell to manage ownership and borrowing with more flexibility.
• Interior Mutability: Allowing mutation through immutable references using patterns like RefCell.

use std::cell::RefCell;
use std::rc::Rc;

#[derive(Debug)]
struct Node {
    value: i32,
    next: Option<Rc<RefCell<Node>>>,
}

fn main() {
    let first = Rc::new(RefCell::new(Node { value: 1, next: None }));
    let second = Rc::new(RefCell::new(Node { value: 2, next: None }));

    first.borrow_mut().next = Some(Rc::clone(&second));
    second.borrow_mut().next = Some(Rc::clone(&first)); // Creates a cycle, but managed by Rc and RefCell

    println!("First node: {:?}", first);
}