如何在Oz中将整数转换为列表，反之亦然？

local
  % turns 123 into [3,2,1]
  fun {Listify N}
    if N == 0 then nil
    else (N mod 10) | {Listify (N div 10)}
    end
  end

  % turns [1,2,3] into 321
  fun {Unlistify L}
    case
      L of nil then 0
      [] H|T then H + 10 * {Unlistify T}
    end
  end
in
  % Turns 123 into 321
  {Browse {Unlistify {Reverse {Listify 123}}}}
end

{Show {StringToInt {Reverse {IntToString 123}}}}