Posts tagged with 'Rust programming'

Found 2 posts tagged with 'Rust programming'.

Rust Cheatsheet

Cheatsheet August 29, 2024
rust 
use std::collections::HashMap;

let mut scores = HashMap::new();
scores.insert(String::from("Blue"), 10);
scores.insert(String::from("Yellow"), 50);

Iterating Over Collections

for i in &v {
    println!("{}", i);
}

for (key, value) in &scores {
    println!("{}: {}", key, value);
}

11. Concurrency

Threads

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Advanced Memory Management in Rust: Understanding Ownership, Borrowing, and Lifetimes

Tutorial August 27, 2024
rust
  • 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.

Example: Using Rc and 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);
}
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