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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.
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You are mutating the nodes by adding an
idproperty; the kata requires not to mutate the nodesThere is no problem with this kata! 955 guys passed it.