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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.
This practice is great, especially if you have a lot of fields and there are some that have aliases. It can take a little more time to read because you have to scroll, but is very clear.
in javascript it can be a 4, try it
This should not be 4 kyu,
the hardest part about it is figuring out that the description is a little misleading.