how to get min x y and max x y of an array of points using fold

[Thomas]

i got this working


      points.fold!(
          (a, b) => min(a, b.x), (a, b) => max(a, b.x),
          (a, b) => min(a, b.y), (a, b) => max(a, b.y)
      )(double.max,  -double.max, double.max,  -double.max));