tuple-map

This library provides iterator-like utility methods like map, fold, for_each, and etc., for tuple.

Example

``` rust extern crate tuplemap; use tuplemap::*; fn main() { let (x, y) = (3, 4); let (x, y) = (x, y).map(|a| a + 5); asserteq!(x, 8); asserteq!(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);

}

```