get value from key c++ map code example
Example 1: c++ get map keys
template<typename TK, typename TV>
std::vector<TK> extract_keys(std::map<TK, TV> const& input_map) {
std::vector<TK> retval;
for (auto const& element : input_map) {
retval.push_back(element.first);
}
return retval;
}
Example 2: get map values c++
template<typename TK, typename TV>
std::vector<TV> extract_values(std::map<TK, TV> const& input_map) {
std::vector<TV> retval;
for (auto const& element : input_map) {
retval.push_back(element.second);
}
return retval;
}