Fun Random Number Generator with Rust std lib

std_rng.rs

// Source: https://www.reddit.com/r/rustjerk/comments/103et69/who_said_there_was_no_random_number_generator_in/
// Source: https://play.rust-lang.org/?version=stable&mode=release&edition=2021&gist=966e4fb514d128f9790be2fce84f8cbe

use std::collections::HashSet;

fn getrandom(dest: &mut [u8]) {
    for byte in dest.iter_mut() {
        for _bit in 0..8 {
            let mut set = HashSet::new();
            set.insert(0u8);
            set.insert(1);
        
            let next_bit = set.iter().next().unwrap();
            *byte <<= 1;
            *byte += next_bit;
        }
    }
}

fn main() {
    let mut buffer = [0; 10];
    getrandom(&mut buffer);
    println!("{buffer:?}");
}