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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.
I think he's referring to the {} after #map.
Yes, because it is to the left. Try to draw the arrow for the vector and the point on a piece of paper and you'll see.
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