weighted_random_list

A Vec that allows you to define the weight of each entry and randomly get entries:
extern crate weighted_random_list;
use weighted_random_list::WeightedRandomList;
fn main() {
let list = [
(1, "https://source.example.net/archive"),
(10, "https://mirror-slow0.example.net/archive"),
(10, "https://mirror-slow1.example.net/archive"),
(100, "https://mirror-fast.example.net/archive"),
];
let mirrors = list.iter()
.map(|(weight, url)| (*weight, url.to_string()))
.collect::<WeightedRandomList<String>>();
let random_choice = mirrors.get_random();
println!("Using {:?} this time", random_choice);
}