Write a method named numUnique
that accepts a sorted array of integers as a parameter and that returns the number of unique values in the array. The array is guaranteed to be in sorted order, which means that duplicates will be grouped together. For example, if a variable called list
stores the following values:
int[] list = {5, 7, 7, 7, 8, 22, 22, 23, 31, 35, 35, 40, 40, 40, 41};
then the call of numUnique(list)
should return 9 because this list has 9 unique values (5, 7, 8, 22, 23, 31, 35, 40 and 41). It is possible that the list might not have any duplicates. For example if list instead stored this sequence of values:
int[] list = {1, 2, 11, 17, 19, 20, 23, 24, 25, 26, 31, 34, 37, 40, 41};
Then a call on the method would return 15 because this list contains 15 different values.
If passed an empty list, your method should return 0. Remember that you can assume that the values in the array appear in sorted (nondecreasing) order.