wtf

Wikipedia and MDN call them "loops".

Yeah you're right, I must have overlooked that. I think I might have just reused the methods I wrote for the other kata in this series, without really paying attention to what each one returned.

Yeah it's probably not so good -- I think it was giving me trouble and I just went with the first way I could think of that worked.

I don't think I knew that there was a math way when I wrote this, haha. Using a loop was probably the most performant way I could think of at the time.

I just did this again in JavaScript, using the same formula as your solution this time, and thought it was pretty good -- then I looked at the other solutions and saw that there's an even better way.

Thanks for the comment! I think these new ways will come in handy again.

That's a good question -- I haven't learned much about security yet so I'm not sure.

That's a cool trick using call to determine if something is a function!

The Description says, "There will always be a missing element and its length will be always between the given arrays", so if I am understanding it correctly, I don't think that case is part of the requirements.

Approved.

(This is my first time approving a kata, so please let me know if I did anything incorrectly. Thanks!)

I just updated the description with a note explaining this at the end, so it should make more sense now.

thanks!