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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 really like your O(1) solution... unclear how you solved that nominal?
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Yeah, this is why i didn't opt for a filter route too... step approach was more elegant than mine though.. face palming now i've seen this....
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Glad to hear it because this is more or less how i did mine... not that clever, but did the job