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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.
wat
You're right the description is not entirely correct, but neither is what you suggest. You do not have to construct and return a new list object. You can alter list a to be the desired output.
Having trouble with 1 test case expecting Javascript and apparently only getting Java.