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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.
user has solved the kata. Question resolved
It creates an array of size ASCII value of 'Z' plus one, and initialises all of them to zero. Somewhat wasteful on space, but makes some later logic easier.