dart - 产生动态的小组成员

Question

我要创建一个名为“Person Group Generator”的简单应用程序，它将根据要创建的人员列表和总组来生成组。例如，您有20个列表人，并希望从该列表中创建10个组，应用程序自动生成10个组，每个组有2个人。这就是我实现它的方式。

class Person {
  final int id;
  final String name;
  Person({this.id, this.name});
}

List<Person> listPerson = [
  Person(id: 1, name: 'Ani'),
  Person(id: 2, name: 'Budi'),
  Person(id: 3, name: 'Citra'),
  Person(id: 4, name: 'Doni'),
  Person(id: 5, name: 'Emilia'),
  Person(id: 6, name: 'Frasisco'),
  Person(id: 7, name: 'Goyu'),
  Person(id: 8, name: 'Hani'),
  Person(id: 9, name: 'Intan'),
  Person(id: 10, name: 'Jeri'),
  Person(id: 11, name: 'Karina'),
  Person(id: 12, name: 'Lemi'),
  Person(id: 13, name: 'Momo'),
  Person(id: 14, name: 'Nini'),
  Person(id: 15, name: 'Opi'),
  Person(id: 16, name: 'Parto'),
  Person(id: 17, name: 'Queen'),
  Person(id: 18, name: 'Risa'),
  Person(id: 19, name: 'Sisca'),
  Person(id: 20, name: 'Toni'),
//   Person(id: 21, name: 'Ucok'),
//   Person(id: 22, name: 'Vani'),
//   Person(id: 23, name: 'Wahyu'),
//   Person(id: 24, name: 'Xixi'),
];


Map<String, List<Person>> generateGroup(
  List<Person> values, {
  int generateTotalGroup = 1,
}) {
  
  var tempMap = <String, List<Person>>{};
  var tempPersonList = <Person>[];
  var totalPersonEveryGroup = 0.0;

  final totalPerson = values.length;
  values.shuffle();
  if (totalPerson % generateTotalGroup == 0) {
    totalPersonEveryGroup = values.length / generateTotalGroup;

    for (int i = 1; i <= generateTotalGroup; i++) {
      var nameGroup = "Group $i";
      var selectedPerson = values
          .getRange(tempPersonList.length,
              tempPersonList.length + totalPersonEveryGroup.toInt())
          .toList();

      tempMap[nameGroup] = selectedPerson;

      tempPersonList = [...tempPersonList, ...selectedPerson];
    }
  } else {
    /// Question to StackOverflow    
  }

  return tempMap;
}

void main() {
  final result = generateGroup(listPerson, generateTotalGroup: 10);
  
  result.forEach((key,listPerson){
    
    listPerson.forEach((person){
      print('key $key || person ${person.name}');
    });
    
  });
}

输出量

key Group 1 || person Emilia
key Group 1 || person Nini
key Group 2 || person Citra
key Group 2 || person Hani
key Group 3 || person Frasisco
key Group 3 || person Queen
key Group 4 || person Goyu
key Group 4 || person Risa
key Group 5 || person Karina
key Group 5 || person Intan
key Group 6 || person Lemi
key Group 6 || person Ani
key Group 7 || person Parto
key Group 7 || person Doni
key Group 8 || person Budi
key Group 8 || person Toni
key Group 9 || person Momo
key Group 9 || person Jeri
key Group 10 || person Sisca
key Group 10 || person Opi

如果总人数可以按所需总人数划分(20人/ 10组=每组2人)，则应用结果是我的预期。但是问题是什么时候无法划分，我不知道如何处理它。
例如，总人数= 24，所需的总人数= 10，如果我将其除以2.4。我期望结果无法分割的结果是这样的:
期望

key Group 1 || person Ani
key Group 1 || person Budi
key Group 1 || person Citra
key Group 2 || person Doni
key Group 2 || person Emilia
key Group 2 || person Frasisco
key Group 3 || person Goyu
key Group 3 || person Hani
key Group 3 || person Intan
key Group 4 || person Jeri
key Group 4 || person Karina
key Group 4 || person Lemi
key Group 5 || person Momo
key Group 5 || person Nini
key Group 6 || person Opi
key Group 6 || person Parto
key Group 7 || person Queen
key Group 7 || person Risa
key Group 8 || person Sisca
key Group 8 || person Toni
key Group 9 || person Ucok
key Group 9 || person Vani
key Group 10 || person Wahyu
key Group 10 || person Xixi

如果不能将总人数除以总人数，我该如何做？
谢谢

Answer 1

尝试这样的事情:

class Person {
  final int id;
  final String name;
  Person({this.id, this.name});
}

List<Person> listPerson = [
  Person(id: 1, name: 'Ani'),
  Person(id: 2, name: 'Budi'),
  Person(id: 3, name: 'Citra'),
  Person(id: 4, name: 'Doni'),
  Person(id: 5, name: 'Emilia'),
  Person(id: 6, name: 'Frasisco'),
  Person(id: 7, name: 'Goyu'),
  Person(id: 8, name: 'Hani'),
  Person(id: 9, name: 'Intan'),
  Person(id: 10, name: 'Jeri'),
  Person(id: 11, name: 'Karina'),
  Person(id: 12, name: 'Lemi'),
  Person(id: 13, name: 'Momo'),
  Person(id: 14, name: 'Nini'),
  Person(id: 15, name: 'Opi'),
  Person(id: 16, name: 'Parto'),
  Person(id: 17, name: 'Queen'),
  Person(id: 18, name: 'Risa'),
  Person(id: 19, name: 'Sisca'),
  Person(id: 20, name: 'Toni'),
  Person(id: 21, name: 'Ucok'),
  Person(id: 22, name: 'Vani'),
  Person(id: 23, name: 'Wahyu'),
  Person(id: 24, name: 'Xixi'),
];


Map<String, List<Person>> generateGroup(
  List<Person> values, {
  int generateTotalGroup = 1,
}) {
  
  var tempMap = <String, List<Person>>{};
  var tempPersonList = <Person>[];
  var totalPersonEveryGroup = 0;

  final totalPerson = values.length;
  values.shuffle();
  var extra = totalPerson % generateTotalGroup;
  
  totalPersonEveryGroup = values.length ~/ generateTotalGroup;

  for (int i = 1; i <= generateTotalGroup; i++) {
    var end = totalPersonEveryGroup;
    if (extra > 0) {
      extra--;
      end++;
    }

    var nameGroup = "Group $i";
    var selectedPerson = values
      .getRange(tempPersonList.length,
                tempPersonList.length + end)
      .toList();

    tempMap[nameGroup] = selectedPerson;

    tempPersonList = [...tempPersonList, ...selectedPerson];
  }

  return tempMap;
}

void main() {
  final result = generateGroup(listPerson, generateTotalGroup: 10);
  
  result.forEach((key,listPerson){
    
    listPerson.forEach((person){
      print('key $key || person ${person.name}');
    });
    
  });
}