YYHome/packages/cs_shared/lib/utils/number_format_util.dart

/// 对数字或金额的格式化
class NumberFormatUtil {
  /// 格式化金额，每三位数分割一个逗号，1000 -> 1,000
  static String formatMoney(int number) {
    List<String> parts = [];
    String numberString = number.toString();

    while (numberString.length > 3) {
      parts.add(numberString.substring(numberString.length - 3));
      numberString = numberString.substring(0, numberString.length - 3);
    }

    parts.add(numberString);

    return parts.reversed.join(",");
  }

  //对比带. 的版本号大小
  static int compareVersionNumbers(String version1, String version2) {
    List<int> v1 = version1.split('.').map(int.parse).toList();
    List<int> v2 = version2.split('.').map(int.parse).toList();

    int minLength = v1.length < v2.length ? v1.length : v2.length;

    for (int i = 0; i < minLength; i++) {
      if (v1[i] < v2[i]) {
        return -1; // version1 < version2
      } else if (v1[i] > v2[i]) {
        return 1;
      }
    }

    if (v1.length < v2.length) {
      return -1;
    } else if (v1.length > v2.length) {
      return 1; // version1 > version2
    }

    return 0; //version1 = version2
  }
}