JavaScript Puzzle about internationally-known fairy-tale

The answer is - Parametric Polymorphism. My functional expression above can take any kind and any number of inputs(arguments). And will simply return all of them as an array. But, can we solve such task any other way? "Go there don’t know where bring it don’t know what" - is not "bring me anything". So, random return is not the answer. If we go back to the fairy-tale, we'll see, that our hero brought some entity with no form, which returns anything you ask. You say food, it returns food, e.t.c. Parametric Polymorphism itself, as a concept, is what the king asked our hero to deliver.