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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 Kata, took me a while to solve it and then I had to refactorize it (too many if).
This site (https://amicloud.github.io/fungide/) helped me with the debugging, here you can enter a test and you can check step by step the stack and output and compare with you own code.
really nice