Kata

Write a function called highestOccurrence

• Return the item in the array that occurrs the highest number of times
• The items in the array will either be strings(capitalization matters), numbers, or a combination of both
• If more than one item have the highest number of occurrences, return the item whose last instance occurs first in the array

Examples: 

highestOccurrence([1, 2, 3, 4, 5, 5, 5]) // 5

highestOccurrence([1, 2, 3, 4, 5, 6, 555, 555, 555]) // 555

highestOccurrence(['hi', 'bye', 'hi']) // 'hi'

highestOccurrence(['hi', 'bye', 'hi', 'Hi', 'Hi', 'Hi']) // 'Hi'

highestOccurrence([2, 3, 4, 2, 'Hi', 'Hi', 'Hi']) // 'Hi'

highestOccurrence([1, 1, 2, 2, 3]) // 1

highestOccurrence([1, 2, 3, 3, 1]) // 3(because 3's final occurrence is before 1's final occurrence)