u r returning something with solution

how easy this would be if it was military time....... if only :(

If you attempted to delete elements of an array without using the .splice() method, a blank - 'undefined' - element is left in the array at that spot. Try pushing only the elements of interest to a new array, or using splice instead of delete.

Expected: '[\'arp\', \'live\', \'strong\']', instead got: '[\'arp\', \'live\', \'strong\', undefined]'

Can anyone explain what's going on here?