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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.
Nice! This is much cleaner than my solution. I like the useage of reduce and replace. I will have to remember to use these more often.
This one is great. I ran up my code to 30 lines doing a similar concept but with many more unecessary steps. Had tunnel vision and didn't consider recursion! Thanks.