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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.
It says "return false for empty array" in description. Please correct, for the tests require to return null for empty array.
It is obviously very wrong. And so are the tests which should be modified. Thanks for pointing it out!
This comment is hidden because it contains spoiler information about the solution
It does not check all cases. isMerge "charles" "cals" "her" should be False. Which is not for at least two programs in solutions sections among which is mine, which I submitted thinking it would not be taken.