Function JoinElementsIterator

be/src/gutil/strings/join.h:334–345

template <class ITERATOR>
void JoinElementsIterator(ITERATOR first,
                          ITERATOR last,
                          StringPiece delim,
                          string* result) {
  result->clear();
  for (ITERATOR it = first; it != last; ++it) {
    if (it != first) {
      StrAppend(result, delim);
    }
    StrAppend(result, *it);
  }
}

template <class ITERATOR>
string JoinElementsIterator(ITERATOR first,