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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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You're only passing the sample tests. Sample tests are meant for you to add/modify as needed while trying to write the solution.
When you attempt, tests written by the kata author is used instead to test your code.
Try adding the following to the sample test editor:
and hit "run sample tests". You should see the same error.
You need to check that
array
is notnull
before accessinglength
property.