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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 number of triple nested loops is amazing. Some beautifully clean code as this example above. But yikes, a bad habit to avoid at all costs unless you have no other option.
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No need for line 2.
You could either
Also, you could chain the function toString together with the other functions (split, sort and join)