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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 test randomly fails and succedes for the same SQL query :( The testing framework is not robust or cannot handle temporal views.
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Very elegant and terse solution. I am wondering that nothing prevents external users to call persistence(31, 5) which may have unwanted consequences elswhere in the codebase.