33 lines
963 B
Dart
33 lines
963 B
Dart
import 'dart:math';
|
|
|
|
class NumUtil {
|
|
static int getInt(num? value) {
|
|
if (value == null) return 0;
|
|
return value.toInt();
|
|
}
|
|
|
|
static double getDouble(num? value) {
|
|
if (value == null) return 0.0;
|
|
return value.toDouble();
|
|
}
|
|
|
|
static String formatNum(double? num, {int index = 2}){
|
|
if (num == null) return '0';
|
|
if((num.toString().length - num.toString().lastIndexOf('.') - 1) < index){
|
|
return num.toStringAsFixed(index).substring(0, num.toString().lastIndexOf('.') + index + 1).toString();
|
|
}else{
|
|
return num.toString().substring(0, num.toString().lastIndexOf('.') + index + 1).toString();
|
|
}
|
|
}
|
|
|
|
static double strToDouble(String valueStr, {double defValue = 0.0}) {
|
|
return double.tryParse(valueStr) ?? defValue;
|
|
}
|
|
|
|
/// 获取一个随机随
|
|
static int getRandomNumber(int min, int max) {
|
|
Random random = Random();
|
|
int randomNumber = random.nextInt(max - min) + min;
|
|
return randomNumber;
|
|
}
|
|
} |