46 lines
1.3 KiB
Dart
46 lines
1.3 KiB
Dart
// Author: fengshengxiong
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// Date: 2024/5/7
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// Description: 整数、浮点数工具类
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import 'dart:math';
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class NumUtil {
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static int getInt(num? value) {
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if (value == null) return 0;
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return value.toInt();
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}
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static double getDouble(num? value) {
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if (value == null) return 0.0;
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return value.toDouble();
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}
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static String formatNum(double? num, {int index = 2}){
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if (num == null) return '0';
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if((num.toString().length - num.toString().lastIndexOf('.') - 1) < index){
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return num.toStringAsFixed(index).substring(0, num.toString().lastIndexOf('.') + index + 1).toString();
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}else{
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return num.toString().substring(0, num.toString().lastIndexOf('.') + index + 1).toString();
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}
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}
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static double strToDouble(String valueStr, {double defValue = 0.0}) {
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return double.tryParse(valueStr) ?? defValue;
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}
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/// 获取一个随机随
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static int getRandomNumber(int min, int max) {
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Random random = Random();
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int randomNumber = random.nextInt(max - min) + min;
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return randomNumber;
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}
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/// 获取不包括当前的随机数
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static int getRandomNumberExcludingCurrent(int min, int max, int current) {
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int newNumber;
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do {
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newNumber = getRandomNumber(min, max);
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} while (newNumber == current);
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return newNumber;
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}
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} |