delta

Category: Arrays

Author: Jessica Miller and Marty Stepp

Book Chapter: 7.4

Problem: delta

Write a static method named delta that accepts an array of integers as a parameter and returns a new array formed
by inserting between each pair of values the difference between those values. For example, given this array:
int[] numbers = {3, 8, 15};
The call of delta(numbers) should return the following array (new elements are bolded):
{3, 5, 8, 7, 15}
In this example, 5 is inserted between 3 and 8 because (8 - 3) is 5, and 7 is inserted between 8 and 15 because (15 - 8)
is 7. The difference should always be computed as the second value minus the first, so you can get negative values.
For example, given the following array:
int[] numbers2 = {3, 8, 2, 5, 1, 9};
The call of delta(numbers2) should return the array:
{3, 5, 8, -6, 2, 3, 5, -4, 1, 8, 9}
You may assume that the array passed is not null. If the array is empty, return an empty array.