I want to be able to append ‘char’s’ to the vector in the map but I can’t figure out how to access said vector to append once the particular key/value(vector) has been created. Any suggestions? I’m iterating over char’s and might be adding a lot to the vector as I go so it would be nice to have a simple way to do it. Thanks. I would like the vector in map to be appended as I go. I don’t need the original vector…I just need to return the map of key/vector’s that I’ve created (after apending) so that I can pass it to another function. What does the * in map* >, do? Is that refrencing a pointer? (I haven’t gotten there in lecture yet) Also, do I need: myMap[key]->,push_back(‘s’), or myMap[key].push_back(‘s’), ?? Or use myMap.find, but then you have to check whether you get an end iterator. operator returns a reference to the vector. But this modifies the vector stored in the map, not the original one, since you’ve stored a copy in the map with myMap[key] = myVector,. If that’s not what you want, you should rethink your design and maybe store (smart) pointers to vectors in your map. you could also use the map::operator to access the map entry, but if the key does not exist, a new entry with that key will be created: To access the mapped value, which in your case is a vector, you just supply the key in square brackets like you did to assign the value. So, to append ‘a’: I have an new suggestion. You can use vector<,char>,* instead of vector<,char>, in order to collect pointer of vectors in your map. For more information see the bellow code: Source.