I’ve just started learning STL containers, and I cannot understand why std::multimap exists. With std::map, we can access values by user-defined keys, but with std::multimap we cannot do that as the latter does not even have an overloaded operator[] and the same key can be mapped to several different values. To me, this looks like… Read More What is the usage of std::multimap?
So I have a map that has user defined keys and the values in it are sets of objects too. So I’m trying to write some print function but I have no idea how to do that. (I’m kind of new to maps and sets). My problem function: void print() const { for (auto& itr… Read More Map of set of custom objects c++
I want to retrieve just the first key of a multimap. I already achieved it with iterating through the multimap, taking the first key and then do break. But there should be a better way, but I do not find it. int store_key; std::multimap<int, int> example_map; // then something in it.. for (auto key :… Read More Retrieve first key of std::multimap, c++