Function gatherr::gatherr

pub fn gatherr<A, B, T: FromIterator<A>, E: FromIterator<B>, I: IntoIterator<Item = Result<A, B>>>(
    iter: I
) -> Result<T, E>

Collect all Ok or Err values from an iterator into a single Result of collections

let v = vec![Ok("a"), Err(1), Ok("b"), Err(2)];

let result: Result<Vec<&str>, Vec<u32>> = gatherr(v);

assert_eq!(result, Err(vec![1, 2]));