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Array.prototype.remove(index) plz

Why's that useful vs [0]? Is the idea that it'd work on sparse arrays?

Because its beautiful sugar, that just makes sense how to use. And yeah could work on sparse arrays. Same with .last. This is huge in langs like Ruby, and I've pushed for it for awhile.

Sure, I'm just trying to figure out why the sugar is tasty. The case for .last is much more compelling, as arr[arr.length - 1] is gross. arr[0] seems ok in comparison.

Readability. Descriptive. I think of the first time I jumped into Ruby, comparing arr[0] and arr.first I knew exactly what to expect from .first. 0 wasn't always clear right away.

Really? But in many cases "first" wouldn't mean "1st", it'd mean "0th". Feels more ambiguous than [0].