Function AppendToImpl

be/src/gutil/strings/split.cc:126–129

// - unordered_map<string, string> - to change append semantics
template <typename Container, typename Splitter>
void AppendToImpl(Container* container, Splitter splitter) {
  Container c = splitter;  // Calls implicit conversion operator.
  std::copy(c.begin(), c.end(), std::inserter(*container, container->end()));
}

// Overload of AppendToImpl() that is optimized for appending to vector<string>.
// This version eliminates a couple string copies by using a vector<StringPiece>