fnRangeValue function

dynamic fnRangeValue(
  1. List values
)

RangeValue(values): range (max - min)

Implementation

dynamic fnRangeValue(List<dynamic> values) {
  if (values.isEmpty) return 0.0;
  final nums = values.map(varToDouble);
  return nums.reduce((a, b) => a > b ? a : b) -
      nums.reduce((a, b) => a < b ? a : b);
}