Cheat sheet: creating Arrays http://2ality.com/2018/12/creating-arrays.html#cheat-sheet-creating-arrays …pic.twitter.com/RcQMQUYXoh
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No more packed SMIs or floats, though, right?
Right. You could use a sentinel value instead of `undefined` (e.g. if you know your array only contains integers in the range [1, 10] then represent `undefined` as `99`) if you really wanted to… But I agree with your advice to focus on writing readable code.
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