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I did not know this variant, thanks. Having to fill the array with anything (even `undefined`) to iterate on it seemed such a weird concept (but then again, JS is weird).

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The spread operator does not have the same quirk. I use it but it's still a bit weird tough

[...new Array(1000)].map(something)

You can drop the new

[...Array(1000)]

I think that is the least bits. Would love to be proven wrong :D

It may be shorter, but I like the spread syntax best used sparingly, it's harder to grasp why it was necessary there at a glance.

That's what I like in the elegance of Array.from({ length: 1000 }): it's a hack, but it reads naturally.

"Harder to grasp" only lasts until you're mildly familiar with the idiom.

[...Array(1e3)]

new Array(1000); ?

Try iterating on it, it won't work. This creates 1000 "empty slots".

In addition to franky47's more important point, I'll add that `new Array()` and `Array()` are equivalent.

In java it would be default initialized but it isn't in js

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