I'm not a JS programmer, but isn't that just an array? Which extends Object. Which has all the failings that the article mentions? What happens when you try to

I'm not a JS programmer, but isn't that just an array? Which extends Object. Which has all the failings that the article mentions? What happens when you try to insert hasOwnProperty? Do you lose access to the superclass hasOwnProperty like the {} object literal's drawback the article mentions? I suspect you do.