I guess it depends on your definition of arrays, and what you expect from them. For example, Ruby calls a similar thing array: https://docs.ruby-lang.org/en/2.0.0/Array.html

To me it is kind of self-growing array that can hold objects of different types. The C++-ish equivalent would be something like std::vector<void*> / std::vector<MagicObjectBoxType> (there is no MagicObjectBoxType of course).