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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.
Looks good, hope it gets merged.
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Why dont just use '+', '-', ...
They are the same as the numerical values, the other is more confusing and is only for ASCII