array_maximal_adjcent_difference.rb

def arrayMaximalAdjacentDifference(inputArray)
    x = 0
    difference = 0

    while (x < inputArray.length - 1)
          if (inputArray[x] - inputArray[x + 1]).abs > difference then
             difference = (inputArray[x] - inputArray[x + 1]).abs
          end

          x = x + 1
    end

    return difference
end