Thanks for building interesting kata, keep it up mate :)

Hi,

The main problem is that the idea of the kata itself is just bad, actually ("bad" as "bad for a kata"). What makes the things worse is that you're patching the holes along the way, meaning you actually didn't create the kata with a clear mind about what it implies to create something like this, and it and just "proves" (in a way) that the idea is bad. I agree that the original idea is kinda funny, but you'll waste sweat and blood, trying to enforce ~~any-~~everything to get there, especially in JS, while at the same time, if you actually succeed at enforcing this special solution, most users will have a pretty bad expeirence at finding how to solve it.

As you can see (I hope), this kind of problem is more a lost cause than anything, when it comes to make a kata out of it.

cheers

-4 * 4 != 16. You're not supposed to convert all numbers to positive.

Your code can't even pass the sample tests, so...