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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.
Yup, see now.
Thanks.
spoiler flag!
Also, you can use fork panel btw
This comment is hidden because it contains spoiler information about the solution
Explain a bit more about the sorting order in the details, like numbers before strings and so on.
Error in tests: variable 'r' should be 'a'
Also might be handy to explain they also need to use len
There is no notion of private variables in this kata.