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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.
Your method is called like this here:
str.toJadenCase()
and in Run.js your're calling it like this:str.toJadenCase(str)
or like this:String.toJadenCase(str)
Read this, I hope it helps.
Not a kata issue, a problem with your code, use
Question
label for things like this. You're not using prototype ok, it doesn't use an argument.