https://teamtreehouse.com/community/there-are-only-3-elements-in-the-datastrings-arraywhy-the-console-on-the-right-shows-4-times-after-we-call-the-map-func
There are only 3 elements in the dataStrings array.Why the console on the right shows 4 times after...
Wei Wei is having issues with: There are only 3 elements in the dataStrings array. Why the console on the right shows 4 times after we call the map function?