function arrayMaximalAdjacentDifference(nums) {
    let maxDifference = Math.abs(nums[0]-nums[1]);
    for (let i = 1; i < nums.length-1; i++){
        
        //Check if existing max is less than the next test, is so swap them 
        if(maxDifference < Math.abs(nums[i]-nums[i+1])){ maxDifference = Math.abs(nums[i]-nums[i+1])};
        //Attempt at a ternary...it works, but not sure a terenary is needed...
        /* (maxDifference < Math.abs(nums[i]-nums[i+1])) ? maxDifference = Math.abs(nums[i]-nums[+1]): maxDifference;*/
    }
   
    return maxDifference;   
}



/**
* Test Suite 
*/
describe('arrayMaximalAdjacentDifference()', () => {
    it('returns largest difference between adjacent values', () => {
        // arrange
        const nums = [2, 4, 1, 0];
        
        // act
        const result = arrayMaximalAdjacentDifference(nums);

        // log
        console.log("result 1: ", result);
        
        // assert
        expect(result).toBe(3);
    });

    it('returns largest difference between adjacent values example 2', () => {
        // arrange
        const nums = [2, 9, 1, 0];
        
        // act
        const result = arrayMaximalAdjacentDifference(nums);

        // log
        console.log("result 2: ", result);
        
        // assert
        expect(result).toBe(8);
    });
});