cmp has been deprecated for a very long time - very bad practice to use it.

yeah, try doing it in nasm and check how easy it is

Fixed.

except that this is a list of cables, not a set, so can use dulicates only if they all are in the list.

For identical strings in compare_weight, you can check equality up front and save yourself the summing / iterating. I like this solution best otherwise!

1. I agree, but it's beginner kata. Could it be more challenging? Yes. Is it too easy to even 8kyu? Perhaps, everything is in the eyes of beholder :)
2. If that is changed now, it would break all solutions so far so I left it as it it.
3. Added more test cases.

Not an issue

Thanks!
I can't see your solution so I guess you haven't finished the kata (or was it not in JS)? So once done you should be able to view the test cases. I double checked and JS, ruby and python include one section for "The funny guy"

I went the route of not using include? But I'd assume that is the best practice for this purpose.

I got no cases of less or more cards then expected (not duplicated), what was mentioned in the description.
Nice kata :)

1. Too easy
2. Comma has to be after the name
3. Just two tests

Too easy

You should add in the descriptions that it needs to be rounded at 2 decimals.