convertArea function

num convertArea(
  1. num area, [
  2. dynamic originalUnit = Unit.meters,
  3. dynamic finalUnit = Unit.kilometers
])

Converts a area to the requested unit. Valid units: Unit.kilometers, Unit.meters, Unit.centimeters, Unit.millimeters, Unit.acres, Unit.miles, Unit.yards, Unit.feet, Unit.inches

Implementation

num convertArea(num area,
    [originalUnit = Unit.meters, finalUnit = Unit.kilometers]) {
  if (area < 0) {
    throw Exception("area must be a positive number");
  }

  final startFactor = areaFactors[originalUnit];
  if (startFactor == null) {
    throw Exception("invalid original units");
  }

  final finalFactor = areaFactors[finalUnit];
  if (finalFactor == null) {
    throw Exception("invalid final units");
  }

  return (area / startFactor) * finalFactor;
}