efficient way to get key from std::map value

Question

I have a map as below :

std::map< std::string ,int> mapobj;
mapobj[\"one\"] = 1;
mapobj[\"two\"] = 2;
mapobj[\"three\"] =3 ;

how to g

Answer 1

Try boost Bimap. all the things you are trying to do can simply be done by it.

1 --> one 2 --> two ... one --> 1 two --> 2 ...

here is a link where a working example is present. here