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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.
Thank you very much for taking the time to answer a noob's question.
That's not an array. Try
console.log(invert([1, 2, 3, -4]));
This is what I passed: console.log(invert(1, 2, 3, -4));
are you sure you're passing in an array to the function?
Why does this solution give me the following error in Visual Studio?
"Uncaught TypeError: array.map is not a function"