Good challenge - first time I felt the need to really write my own functions... Can I ask though - how does the node versioning work? Why is it not set to the latest version / latest stable version? 👏💻😲😎🥇 I wasn't able to use Array.flat(), and when I checked it's because of the node version (I think).

Thanks for your help but unfortunately I'm still stuck... The log just says expected True but got False. I will have to spend some time away from it and do some other katas, and see if a fresh mind will help. Thanks again.

Thanks! I did it first time but all the tests failed...!

Was sure I'd managed it, so I checked the tests and could see that I'd just done it the wrong way around, and had first capitilised the odds instead of the evens... A quick fix. Enjoyed it, thanks again!