Thanks for clarifying.

Please don't post solutions in Discourse.

Note that the test cases do not include any url with more than two dots in prior to the first /, like www.google.co.uk. It could be a good idea to include this kind of url, which could change an accepted answer somewhat.

It says left and right and it's shown the pivot is not included in neither side in the examples.

but the array &[10, -10] expects None rather than 0.

index 0 is 10, the left side is 0 and the right side is -10, so it's not the same case as the all zero array at all.