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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.
yes,
Yes, there's clearly a contradiction between the instructions and the test.
"Create the function off, that receives the nth switch as argument n."
Is the author trying to say, ~"receives the number of switches as argument 'n'."?