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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
By the same reason "same(None, None)" returns False
Well, It's ok None and [] should be treaded differently. But it should be said explicitly. Nothing is evident when we deal with values like None, False, 0, [], "", NULL etc. It all should be said explicitly.
"If a or b are empty the result is evident by itself."
I was sure is it evident that same([], []) should return False, but tests say it should return True. So it is not evident :)