flatList = flatList.filter(flat => {
        return p.storeyFrom == -1 || parse(p.storeyFrom) <= parse(flat.floor);
      });

      flatList = flatList.filter(flat => {
        return p.storeyTo == -1 || parse(p.storeyTo) >= parse(flat.floor);
      });

      flatList = flatList.filter(flat => {
        return (
          p.roomAmount == 0 || parse(p.roomAmount) == parse(flat.roomsAmount)
        );
      });