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I'm trying to find the key in an object that has a third element in an array and then convert it to a number. What is the best way of doing it?

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  • Why do you want to write it one line? What's your objective? Commented Oct 26, 2020 at 20:00
  • So how is this different than stackoverflow.com/questions/64542615/… Commented Oct 26, 2020 at 20:09
  • You really need to start selecting answers to your questions. You asked 10 questions, zero have selected answers. Commented Oct 26, 2020 at 20:11

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Use .find() to find the array with at least 3 elements.

let number;
let arr = Object.values(numbersObject).find(a => a.length >= 3);
if (arr) {
  number = arr[2];
}

To do it in one line, use || to supply a default value if no array can be found:

let number = (Object.values(numbersObject).find(a => a.length >= 3) || [,,null])[2];
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