gistfile1.rs

// Version 1:

let mut n_most_common = Vec::with_capacity(n);

for _ in range(0u, n) {
    let Counted { k, v } = pq.pop().unwrap();
    n_most_common.push((k, v));
}
n_most_common

// ---------

// Version 2:

range(0u, n).map(|_| {
    let Counted{ k, v } = pq.pop().unwrap();
    (k,v)
})
.collect()