today i learned

So string interpolation works? lol

How stupid I am XDDD

This answer blows my mind, but i think it's worth having a caveat: it only works if the supplied numbers match the scenario where one-and-only-one number is used an odd number of times. If multiple numbers are used an odd number of times or all numbers are used an even number of timees, then you'll get a seemingly random number and not be able to determine what is what...

😄

If the Kata supplied floats, then this would have been invalid. But it doesn't.

Whaaaaat??!!!

It depends on what you're working on. If this function were part of a website backend counting characters in usernames or something, it doesn't really matter at all. But if this is a helper function that is responsible for comparing billions of base pairs in genetic sequencing or part of a stock trading platform where microseconds matter, then you need to rethink it.

Would it matter? I assume itll be a O(2n) vs O(n) but I'm not sure if that's a big deal.

Best!

Very clever;