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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.
Best practices doesn't mean the absolute most efficient code possible, especially at the expense of readability. This solution is bog-standard, 101 level programming. It's impossible for this to be a bad practice besides the lack of brackets on the if-statement which people have mixed opinions about.