Function vec_to_csv

src/csv.rs:22–32

Converts a vector into a comma seperated list of values. As delimiter the string `sep` is used. # Example ``` use rustml::csv::vec_to_csv; let a = &[1, 2, 3]; assert_eq!(vec_to_csv(a, ","), "1,2,3"); ```

(v: &[T], sep: &str)

/// assert_eq!(vec_to_csv(a, ","), "1,2,3");
/// ```
pub fn vec_to_csv<T: fmt::Display>(v: &[T], sep: &str) -> String {

    v.iter().enumerate()
        .map(|(c, val)| 
            match c {
                0 => format!("{}", val),
                _ => format!("{}{}", sep, val)
            }
        )
        .fold(String::new(), |s, val| s + &val)
}

/// Converts a matrix into a comma seperated list of values.
///