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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.
When I saw this problem I thought it was easy.When I started to do it, I found the rules that kata gave me were too hidden.And I can pass any test, including my own test in all cases.But when I submitted it, I found that the last test was always wrong, and when I printed his use case to the console, I found out,"a\n b\n c" return ""?WTF!For this reason, I am in a bad mood. I just want to say that this problem makes me very bored