echo.rs

fn main() {
    let args = os::args();
    match args.tail() {
        [~"-n",..strs] => print(str::connect(strs, " ")),
        strs => println(str::connect(strs, " ")),
    }
}

echo2.rs

// typing str::connect twice is too much
fn main() {
    let args = os::args();
    let (func,strs) = match args.tail() {
        [~"-n",..strs] => (print, strs),
        strs => (println, strs)
    };
    func(str::connect(strs, " "))
}