It's a saying, it means "one or more"

I think they wrote rows and cols wrong way round. Poor from them

This is not true. Array of arbitrary sizes

Thanks for the hint. I'll try something around there.

That's not how you select some columns. Why are you using * there?

I have a question. The problem states that the two combs "miss a tooth or two.". However in the second test case is combs("...","."), the first one of those combs has three missing teeth. What am I getting wrong?

I see... Thanks. I'll try that!

Update: I got it! Your tip definitely helped!
Thank you!

I am having a similar problem. Locally my solution seems to work. I get the tests to pass but on the web the results come slighty differently. Any hint? I'll post my code as a spoiler in the next comment if somebody can comment, it would be very much appreciated.

The way this kata is explained makes it much harder than the average kata for this level 8kyu.
It's not the complexity of the problem itself, just the instructions are not appropiate for this level.

Thanks for your answer. I had a console.log(something) right before the final return. I erased it and it worked flawless.

(that's not 137 errors, it's error code # 137) which means your code is timing out, probably because your code is not optimized well enough