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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.
There is no problem with the tests. Make sure you're reading the logs the right way, they appear above the test result. Read this: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution
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If you're not sure what happened then you don't know that there's an issue with the kata. This should be a question rather than an issue.
Judging by wording of this report and the number of javascript completions, this isn't an issue, whatever it is. Please prove me wrong.
In Javascript, the test 10 says expected 0 instead got 1. In the array there is one unique number and my code is displaying it correctly.
I console log the array to check and should be correct