Arcade IsEmpty on empty array always returns False?

Question

I'm working on an Arcade labeling expression in Arc Pro 3.0. If I enter only the code below, everything is labeled "0, false". Since nothing's been added to the array, I'm expecting IsEmpty to return "true". Am I thinking about this wrong, or is it maybe a bug?

var u = [];
return Count(u) + ", " + IsEmpty(u);

Obviously I can use Count to check the array contents instead, but I've used IsEmpty in so many other places I just expected it to apply to arrays also.

kenbuja · Accepted Answer

That's actually spelled out in the documentation

Returns false for all other cases, including empty arrays and dictionaries.