问Dart映射排序-基于列表中的值

EN

import 'dart:collection';

void main() {
  final userVotes = {
    "arbourn": [1, 0, 7],
    "burun": [2, 9, 0, 1],
    "niko": [1, 0, 3, 10],
    "niko2": [1, 0, 3, 10, 0],
  };

  final sortedMap =
      LinkedHashMap.fromEntries(userVotes.entries.toList()..sort(sortMethod));

  sortedMap.forEach((key, value) => print('$key: $value'));
}

int sortMethod(MapEntry<String, List<int>> e1, MapEntry<String, List<int>> e2) {
  final l1 = e1.value;
  final l2 = e2.value;
  final minLength = l1.length > l2.length ? l2.length : l1.length;

  for (var i = 0; i < minLength; i++) {
    if (l1[i] > l2[i]) {
      return -1;
    } else if (l1[i] < l2[i]) {
      return 1;
    }
  }

  return l2.length.compareTo(l1.length);
}

burun: [2, 9, 0, 1]
arbourn: [1, 0, 7]
niko2: [1, 0, 3, 10, 0]
niko: [1, 0, 3, 10]

import 'dart:collection';

class UserVote implements Comparable<UserVote> {
  final String name;
  final List<int> list;

  const UserVote(this.name, this.list);

  @override
  int compareTo(UserVote o) {
    final minLength = list.length > o.list.length ? o.list.length : list.length;

    for (var i = 0; i < minLength; i++) {
      if (list[i] > o.list[i]) {
        return -1;
      } else if (list[i] < o.list[i]) {
        return 1;
      }
    }

    return o.list.length.compareTo(list.length);
  }

  @override
  String toString() => '$name: $list';
}

void main() {
  final userVotes = {
    "arbourn": [1, 0, 7],
    "burun": [2, 9, 0, 1],
    "niko": [1, 0, 3, 10],
    "niko2": [1, 0, 3, 10, 0],
  };

  final listOfUserVotes =
      userVotes.entries.map((e) => UserVote(e.key, e.value)).toList();

  listOfUserVotes.sort();
  listOfUserVotes.forEach(print);
}