main.dart

void main() {
  
  var users = ["a","b","c"];
  var tasks = 10;
  print(roundRobin(users,tasks));
}

Map<N, List<T>> roundRobin<N, T>(List<N> names, int taskCount, T createTask(int number)) {
  var tasks = [for (var i = 0; i < names.length; i++) <T>[]];
  for (var i = 0, j = 0; i < taskCount; i++) {
    tasks[i % tasks.length].add(createTask(i + 1));
  }
  return {for (var i = 0; i < names.length; i++) names[i]: tasks[i]};
}