Are HashMap keys unique?

If you use the standard std::map associative container with std::string or std::wstring as key types, you get a case sensitive comparison by default .

While object properties are strings and they are case sensitive , you could use an own standard and use only lower case letters for the access. You could apply a String#toLowerCase to the key and use a function as wrapper for the access.

HashMap is a container that stores key-value pairs. Each key is associated with one value. Keys in a HashMap must be unique .