using of ternary operator is a really a game changer nowadays

So what is the value of -x be?

Never mind, I checked the question again.

good

Thank you very much for taking the time to answer a noob's question.

That's not an array. Try console.log(invert([1, 2, 3, -4]));

This is what I passed: console.log(invert(1, 2, 3, -4));

are you sure you're passing in an array to the function?

Why does this solution give me the following error in Visual Studio?
"Uncaught TypeError: array.map is not a function"

You can. Just do it:)

Looks like we came up with almost the same solution: https://www.codewars.com/kata/reviews/57a5c44ae08254d7a4000125/groups/5d88680f23ba73000102b3f7

Is there a reason you can't just do return array.map(x => x * -1)? I mean, if you're multiplying everything by -1 it returns everything's inverse...

This was my solution as well, except I have added one more check to see if array.length === 0. But now that I see this, I realise that additional check was redundant. Nice :)