Takes each element in the Iterator: if it is an Err, no further elements are taken, and the Err is returned. Should no Err occur, a vector containing the values of each Result is returned.

Here is an example which increments every integer in a vector, checking for overflow:

use std::result;
use std::uint;

let v = vec!(1u, 2u);
let res: Result<Vec<uint>, &'static str> = result::collect(v.iter().map(|x: &uint|
    if *x == uint::MAX { Err("Overflow!") }
    else { Ok(x + 1) }
));
assert!(res == Ok(vec!(2u, 3u)));