function arrayMaximalAdjacentDifference(nums) {
    //  write code here.
    let max = 0
    let array = []
    
    for(let i=0; i < nums.length; i++){
            array.push(Math.abs(nums[i] - nums[i-1]))
            array.push(Math.abs(nums[i] - nums[i+1]))
    } 
    
    for(let i=0; i < array.length; i++){
        if(max < array[i])
        max = array[i]
    }
    return max;
}



/**
* 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);
    });
});