> the index 2 remains present as a “hole” (like I mentioned before, almost a third kind of null). It's an interesting model, and I think it definitely has its

> the index 2 remains present as a “hole” (like I mentioned before, almost a third kind of null). It's an interesting model, and I think it definitely has its uses when reasoning about JS arrays. I'm not yet convinced it's the best model, but it's something I'm going to have to let percolate through my brain for a while to weigh it up properly. Thanks.