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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.
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No, it's not. That's
Javascript's function you are referring to.Edit: And as I've said before this kata haven't yet translated to Python
Were you not in the python section of the training page?
https://www.codewars.com/kata/582a53ed261c2af9d200018c/train/pythonEdit: There haven't been a Python translation on this kata
@benjaminzwhite is right: it's not an issue. Your post is too vague. You must read https://docs.codewars.com/training/troubleshooting.
Since you seem to be working in Python: I checked the 3 preloaded tests and they are fine; they are the same as the ones used in the kata description.
The only additional one is the edge case test with empty array,
[].You shouldn't use the Issue tag for these kind of comments, the mods will tell you to raise a question or just post a comment - state your specific problem also, right now you are too vague.
By the way the kata has been solved almost 5,000 times in Python so it's unlikely something is wrong with the kata rather than your code.