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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.
Which language. I suppose you "console.log" too much.
Say
console.log(peopleInLine)and you will know at least what you get at the input, so it will help you sort it out.