One of n lines in a file: Difference between revisions

<lang rust>extern crate rand;

use rand::{Rng, thread_rng};

fn one_of_n<R: Rng>(rng: &mut rand::ThreadRngR, n: usize) -> usize {

match rng.next_f64() {

y if y < (1.0 / (cand + 1) as f64) => cand,

_ => keep

}

)

let mut dist = [0usize0_usize; 10];

let mut rng = rand::thread_rng();

dist[let num = one_of_n(&mut rng, 10)] += 1;