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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 for a quick reply! Will investigate!
Are you using a global var? Read this: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution
Locally JavaScript code works fine (using loop). Test results (console.logged) show some erratic calculations. Checking them locally : code works fine and gives a right answer. Puzzled.