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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 failed to test an instance where either a or b could be ""
this helped.
This was insighful
it is called a list comprehension, similar to the lambda function, because of how syntax's can be written on a single line.
[] is used for list comprehension.