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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.
It's nice to know that double for loops are popular in this kata!
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Can someone explain this code?
description updated
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tips : nodes immutable
cool