Question

How to pick a random element from a vector in Rust

Answer 1

use rand::seq::SliceRandom;
 
fn main() {
    let v = vec![2, 6, 9, 1, 0, 3, 8, 5, 7];

    let mut rng = rand::thread_rng();
    
    let num = v.choose(&mut rng).unwrap();
    
    println!("{}", num);
}




/*
run:

8

*/

 

70+ SQL courses for beginners and professionals

Answer 2

use rand::{self, Rng};

fn main() {
    let v = vec![2, 6, 9, 1, 0, 3, 8, 5, 7];

    let num = v[rand::thread_rng().gen_range(0..v.len())];

    println!("{}", num);
}





/*
run:

1

*/

 

70+ SQL courses for beginners and professionals