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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.
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I don't know how I got this error:
Test Crashed
Caught unexpected signal: SIGSEGV (11). Invalid memory access.
It could be I try to return a pointer. But I did the same thing in previous questions and never get an error