Method join

src/octave.rs:32–43

(&self, v: &[T])

    }

    fn join<T: fmt::Display>(&self, v: &[T]) -> String {

        let mut s = String::new();

        for (idx, val) in v.iter().enumerate() {
            if idx > 0 {
                s = s + ",";
            }
            s = s + &format!("{}", val);
        }
        s
    }

    fn to_vec<T: fmt::Display>(&self, v: &[T]) -> String {