Right, for..in is not the same as iterating through all elements in an array. Understood. But it works excellent in the example the OP created and in my follow-up example.

And I agree that accessing the length property in the conditional is not ideal.

I guess it comes down to this for me: I don't feel that Javascript has an unduly burdensome list of common idiosyncrasies to justify developing in a 'different language'/syntax that compiles into javascript and changing my development workflow to reap said questionably useful benefits.

Perhaps I am simply not the intended audience.