main.rs

use std::fs;
use std::collections::HashSet;

fn list_to_set(s: &str) -> HashSet<String> {
    let mut recup_nums = HashSet::new();
    let mut acc = String::from("");
    for c in s.chars() {
        if c.is_numeric() {
            acc.push(c);
        } else if !acc.is_empty() {
            recup_nums.insert(acc);
            acc = String::from("");
        }
    }
    recup_nums
}

fn main() {
    let recup = fs::read_to_string("recup.txt")
        .expect("read recup");

    println!("len: {}", recup.len());

    let recup_set = list_to_set(&recup);

    let repoussoir = fs::read_to_string("base-repoussoir_1_21.csv")
        .expect("read base repoussoir");

    println!("len: {}", repoussoir.len());

    let repoussoir_set = list_to_set(&repoussoir);

    for num in recup_set.difference(&repoussoir_set) {
        println!("num {:?}", num);
    }
}