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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.
RIGHT!!! I thought I had finally found the most basic way to the solution with a ternary operator. But that good ole 'truthy' statement....lol
Why are you checking for 4? This problem doesn't treat 4-element arrays any special way.
if(numbers.length >= 2) // not getting why it worked with this and not if(numbers.length >= 4)