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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.
you're wrong:
the 0 here is the value under the pointer, not the "address of the pointer in the tape". So
if '[' was encountered at 0, the value under the pointer IS 0 and you effectively move forward in any case.