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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.
... this kata WAS meant to be solved using functional programming.
OP passed the kata, closing.
Your solution seems to work fine for me, and the network error sounds unusual. Can you submit solutions to any other kata? Can you submit your solution to this kata again in a couple of minutes?
thanks for breaking it down, it really helped me to understand