Loading collection data...
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.
If you see that error message, then it isn't returning 1.
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Unfortunately, tasks which are meant to reimplement a built in are not really good Codewars kata. Restrictions are very easy to work around, and difficult to enforce.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution