extern crate csv;

use std::collections::HashMap;

fn main() {
    let files = vec!["file1", "file2", "file3"];

    let mut topics: HashMap<(&str, &str), &str> = HashMap::new();
    for filename in files {
        let mut rdr = csv::Reader::from_path(format!("{}.csv",filename)).unwrap();

        for rec in rdr.records() {
            let rr = rec.unwrap();
            let value1 = rr.get(0).unwrap();
            let value2 = rr.get(1).unwrap();
            topics.insert((filename, value1), value2);
        }
    }
}