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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.
Failed tests:
I'd have to compute the end item of the range, which I did not want to do as this is sometimes prone to erros, especially regarding the inclusion of last element, e.g. if c is float.
Since I'm using xrange I'm not evaluating two lists so this is not much slower.
Why would you loop trough a range when you can return a range directly ?