Smash Your Rust Interviews. Certified.

fn main() {
    let s1 = String::from("hi");
    let s2 = s1;
    println!("{s1}");
}

use std::collections::HashMap;

fn get<'a>(m: &'a mut HashMap<String, String>, k: &str) -> &'a str {
    m.insert(k.to_string(), "hi".to_string());
    m.get(k).unwrap()
}

use std::sync::Arc;
use std::thread;

fn main() {
    let data = Arc::new(vec![1,2,3]);
    for _ in 0..3 {
        let d = Arc::clone(&data);
        thread::spawn(move || println!("{:?}", d));
    }
}