Loading collection data...
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.
It's a saying, it means "one or more"
I think they wrote rows and cols wrong way round. Poor from them
This is not true. Array of arbitrary sizes
That's not how you select some columns. Why are you using
*there?(that's not 137 errors, it's error code # 137) which means your code is timing out, probably because your code is not optimized well enough