for arg in std::env::args().skip(2)

let check: Vec<String> = env::args().collect();

if check[1] == 'sort'{
    for arg in std::env::args().skip(2){
       //sort
    }
}

let second_arg = env::args().nth(1).expect("no second arg");

let mut args = env::args();
match args.nth(1).as_ref().map(|s| s.as_str()) {
    // args has been consumed so it will iterate over the next elements
    Some("sort") => for arg in args {
        println!("arg: {}", arg);
    },
    _ => {},
}