calculate method

double calculate(
  1. double value
)

找到更接近 0 0.25 0.5 0.75 1

Implementation

double calculate(double value) {
  Map<double, double> map = targetMap(value);
  var list = map.keys.toList();
  list.sort((a, b) => a.compareTo(b));
  return map[list[0]]!;
}