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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.
For me seems hard for first sight, because of word game. But when you read the description carefully, you know it is very easy!
Is that solution same as if function that select in each operator or it will process all the operator function?
Superb