Rust sort sample

gistfile1.txt

extern mod std;
fn main() {
    let input = io::file_reader(&Path(os::args()[1]));
    let output = result::get(&io::file_writer(&Path(os::args()[2]), [io::Append, io::Create]));
    let mut lines = result::get(&input).read_lines();
    std::sort::quick_sort(lines, |a,b| {
        str::le(*a, *b)
    });
    for lines.each |l| {
        output.write_line(*l);
    }
}