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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.
I'm curious about whether setting a default parameter is wise here - what if somebody using this particular implementation decided to override the default with an argument? The code would fail to return the correct answer, as outlined in the specification. What are others' thoughts on this as a general practice?