True!

Try to google "multiple assignment".

Or read https://stackabuse.com/unpacking-in-python-beyond-parallel-assignment/ for a more in depth explanation.

Also for (-1, 1)[n<1], n<1 will be evaluated as a boolean, True is equivalent to 1 and False to 0, so it could be translated as

1 if n<1 else -1

.

.

Fixed.

Since you ask to handle "a sequence of any type", it is definitely not trivial in JavaScript.
I would rank it 6th Kyu because you have to know about advanced language features.

Glad you managed it. I've just merged in a Javascript translation if you want to try that. :)

It is because you mutate the arguments and op didnt make a copy of the args when using his function to compare. He needs to json.parse and json.stringify