tuple-map

This library provides iterator-like utility methods like map, fold, for_each, and etc., for tuples whose all elements are same type(i.e. (T, T), (T, T, T), (T, T, T, T)...). If you want to map individual elements of arbitrary tuples (T, U), (T, U, V)..., use map_tuple.

Example

extern crate tuple_map;
use tuple_map::*;
fn main() {
    let (x, y) = (3, 4);
    let (x, y) = (x, y).map(|a| a + 5);
    assert_eq!(x, 8);
    assert_eq!(y, 9);

    let v = (3, 4, 5, 6).fold(vec![], |mut v, x| {
        if x % 3 == 0 {
            v.push(x);
        }
        v
    });
    assert_eq!(v, vec![3, 6]);

    assert!((3, 3, 3).same());

    assert_eq!((3, 4, 5).nth(1), Some(4));

    assert_eq!((3, 4, 5).add(1, 2, 3), (4, 6, 8));

    let a = (1, 2, 3);
    let b = ("a", "b", "c");
    assert_eq!(
        a.zipf(b, |x, y| format!("{}{}", x, y)),
        ("1a", "2b", "3c").map(|x| x.to_owned())
    );

    assert_eq!(a.sum(), 6);

    assert_eq!(a.tmax(), 3);
    assert_eq!(a.tmin(), 1);
}