Ask HN: What is your proudest little invention or discovery?

  dZ = 0.001 * mouseDeltaX;
  dX = 0.001 * mouseDeltaY;

  for i in atoms {
    atoms[i].x += dZ * atoms[i].y;
    atoms[i].y -= dZ * atoms[i].x;

    atoms[i].y += dX * atoms[i].z;
    atoms[i].z -= dX * aroms[i].y;
  }

    remove(node)
    {
        next = node->next;
        node->data = next->data;
        node->next = next->next;
        free(next);
    }

   n    3       n    2
  Sum (k )  = (Sum k)
  k=1          k=1