johnnycopes

/*
This algorithm challenge came up in Colt Steele's "JavaScript Algorithms and Data Structures" course:

Implement a function called `countUniqueValues` which accepts a sorted array and counts the unique values in the array.
There can be negative numbers in the array, but it will always be sorted.

Example output:
```
countUniqueValues([1, 1, 1, 1, 1, 2]); // 2
countUniqueValues([1, 2, 3, 4, 4, 4, 7, 7, 12, 12, 13]); // 7