gistfile1.cpp

    std::string tag_key, tag_value;
    bool has_tags = false;
    map<string,string> tags;
    if (!args[1]->IsUndefined()) {
      Local<Object> tagsObj = args[1]->ToObject();
      Local<Array> tagNames = tagsObj->GetPropertyNames();
      uint32_t length = tagNames->Length();
      for (uint32_t i=0; i<length;i++) {
        Local<String> v8TagKey = tagNames->Get(i)->ToString();
        Local<String> v8TagValue = tagsObj->Get(v8TagKey)->ToString();

        std::string tagKey(*String::AsciiValue(v8TagKey));
        std::string tagValue(*String::AsciiValue(v8TagValue));
        tags[tagKey] = tagValue;
      }   
      has_tags = true;
    }