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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.
Is like I do it?
The ranking levels have changed significantly recently a lot of the older kata would be ranked very differently if published today, and a lot of them would never be published today.
Where do you see it called for each letter? It's called once. And calling
ToLowerfor each rune would do the same amount of work and save some memory (not that it usually matters, though).