"Spiteful words can hurt your feelings but silence breaks your heart." - C.S. Lewis

cassidoo Challenge 3-12

function overlapArea(arr1, arr2) {
  const rect1 = {
    left: arr1[0],
    right: arr1[2],
    top: arr1[1],
    bottom: arr1[3]
  };
    
  const rect2 = {
    left: arr2[0],
    right: arr2[2],
    top: arr2[1],
    bottom: arr2[3]
  };
    
  const x = Math.min(rect1.right, rect2.right) - Math.max(rect1.left, rect2.left);
  const y = Math.min(rect1.bottom, rect2.bottom) - Math.max(rect1.top, rect2.top);
    
  return x > 0 && y > 0 ? x * y : 0;
}

overlapArea([0,0,4,4], [2,2,4,4]);