How can I clear a map in C++11?

How can I clear a map in C++11?

You can clear a map in C++11 using the clear() method. For example, myMap.clear(); will remove all elements.

Does clearing a map free the memory used by its elements?

No, clear() removes the elements but does not free the memory allocated for the map itself. The map will still exist.

Is there a way to completely reset a map?

Yes, you can use clear() to remove all elements, and if you want to free memory, you can create a new map instance.

Can I use swap() to reset a map?

Yes, you can swap it with an empty map to effectively reset it and free the memory used by the old map.

What happens if I try to access elements after clearing the map?

Accessing elements after clearing the map will lead to undefined behavior, as the map will be empty.