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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.
Permutation generation is a duplicate to many katas.
Needs random tests
For random input you have to check the results of your solution code against the user code. Normally you can find examples what to do for katas you've solved - there you can look at "Show Kata Test Cases" and you can see what othes do;-).
Thanks smile67, Is there a good way to find the expected values from a random string test to assert on?
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