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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.
The correct way to learn, overall if you're new and don't know some existent methods is asking or searching in the net. You never get the solution just waiting for goddess inspiration, right? In that case I rised the solution almost by myself because of the similitude of Java but I don't know why an identic code that gave me ChatGPT worked when asked why not mine...