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.
I agree with the comment about the instructions being unclear but will accept the challenge to not use pop - as that was part of my solution. Thanks for feedback everyone.
I'm getting the 'don't mutate the input' error for pretty much all the tests. I don't understand what that is testing for. Can you explain that please?