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Caesar Bell24,468 Points
Found a bug with your JS approach
I found an issue with your JS approach. For the midpoint you are using collection.length / 2 which would continue to give you the same value. It should be
Math.floor((start + last) /2) instead of
Math.floor(collection.length /2). Hopefully this was helpful.
Thank you again for your wonderful class, I am learning a lot.