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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.
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No, this isn't required anywhere. 2 empty arrays are "same" (they are not null)
And many were shown the tests are fine. Print something besides the input values. Like this:
Read this: https://docs.codewars.com/training/troubleshooting/ you're probably confusing a test case with another one.
No, it isn't.
I just tested it.
That's a good question -- I haven't learned much about security yet so I'm not sure.
Expected
2016
, actualNone
Oh, right.
Descriptions:
Don't mutate the input.