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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.
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ES2015
for...ofwill handle that loop for youPlease keep in mind this is a 8/7kyu kata, a beginner wouldn't know that the given data is bad practice, or why. By replacing the given data with something else you practically created a different scenario, which I don't think counts as a solution to this one. Perhaps the better approach would be to submit an issue to the author or request an edit of the kata.