map.rs

use std::iter::Iterator;

fn map<T, U, I: Iterator<T>>(fun: |T| -> U, mut iter: I) -> Vec<U> {
    let mut acc = vec![];
    for elt in iter {
        acc.push(fun(elt));
    }
    acc
}

fn main() {
    let x = map(|x| x + 2, vec![1u,2,3].move_iter());
    println!("{}", x);
}