Map

header

#include <map>

std::map<unsigned int, std::string> KeyMap;

Copy

copyTo.erase(copyTo.begin(), copyTo.end());

std::map<unsigned int, std::string>::const_iterator i;
for(i = KeyMap.begin(); i != KeyMap.end(); ++i)
    copyTo[i->first] = i->second;

erase

KeyMap.erase(KeyMap.begin(), KeyMap.end());

Add an element

int idx(1);
string keyMapID("value");

KeyMap[idx] = keyMapID;

Find an element

int idx(1);

std::map<unsigned int, std::string>::const_iterator i = KeyMap.find(idx);
if(i != KeyMap.end())
    string value(i->second);