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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.
Definately the best solution since author gets wing just as regexp result with no need to convert string into array in one more operation (what we see in ZozoFouchtra solution).