Function MapVector

cpp/src/arrow/util/vector.h:89–95

template <typename Fn, typename From,
          typename To = decltype(std::declval<Fn>()(std::declval<From>()))>
std::vector<To> MapVector(Fn&& map, const std::vector<From>& source) {
  std::vector<To> out;
  out.reserve(source.size());
  std::transform(source.begin(), source.end(), std::back_inserter(out),
                 std::forward<Fn>(map));
  return out;
}

template <typename Fn, typename From,
          typename To = decltype(std::declval<Fn>()(std::declval<From>()))>