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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.
done
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Not a kata issue
Not anymore ;-)
done thanks
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Sometimes when I submitted the code it showed "Unknown error"
seems not related to the kata.
For the method declaration it miss the return type
public static sumDigits(long n)
It has an error in the unit test Single Arg expect an String when the function returns an array of strings
Should provide at least one test