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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.
Checking all sorts of conditions that can't happen. Checking some conditions that are specified as not happening, but not others.
if ( isLeap == true )
antipattern.No, voting this a Best practice is not a best practice.