random static method

double random({
  1. double min = 0,
  2. double max = 1,
  3. int fractionDigits = 2,
})

生成随机数（支持范围和小数位数）

Implementation

static double random({double min = 0, double max = 1, int fractionDigits = 2}) {
  final r = Random().nextDouble() * (max - min) + min;
  return double.parse(r.toStringAsFixed(fractionDigits));
}