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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.
The instructions don't say what the function is supposed to return. I assumed it wanted the index of the ball and I was right but it should say that.
No local test cases. Server-side test cases are hard to interpret to find the problem "ThereIsNoSpoonThereIsNoSpoon..." is hard to grok for potential issues in your algorithm.