[Boost-users] converting value before inserting into a list

I want to convert values according to a map before inserting it into the list. What is a proper way to do that? I have this: map<int,int> m; vector<int> a,b; for(vector<int>const_iterator i=a.begin();i!=a.end();++i) b.push_back(m[*i]); I could use std::copy with std::back_inserter to add elements to b, but how do I convert it first? Should I write my own version of back_inserter for that? copy(a.begin(),a.end(),my_back_inserter(b,m)); Thanks. -- Regards, Alexander. http://sjcomp.com