如何从一个flux中准确地获得n个成功的操作结果？

// 定义Action
const ActionTypes = {
  FETCH_DATA: 'FETCH_DATA',
};

// 定义Store
const store = {
  data: [],
  successCount: 0,
};

// 定义Action Creator
const fetchData = (url) => {
  return new Promise((resolve, reject) => {
    // 模拟异步操作
    setTimeout(() => {
      const isSuccess = Math.random() < 0.8; // 80%的概率为成功
      const result = {
        url,
        isSuccess,
      };

      if (isSuccess) {
        resolve(result);
      } else {
        reject(result);
      }
    }, 1000);
  });
};

// 注册Store监听器
const listeners = [];
const register = (listener) => {
  listeners.push(listener);
};
const notifyListeners = () => {
  listeners.forEach((listener) => {
    listener();
  });
};

// 分发Action
const dispatch = (action) => {
  switch (action.type) {
    case ActionTypes.FETCH_DATA:
      fetchData(action.url)
        .then((result) => {
          store.data.push(result);
          store.successCount++;

          notifyListeners();
        })
        .catch((error) => {
          store.data.push(error);

          notifyListeners();
        });
      break;

    default:
      break;
  }
};

// 注册Store监听器
register(() => {
  const n = 3; // 获取n个成功的操作结果
  const successResults = store.data.filter((result) => result.isSuccess).slice(-n);

  console.log(successResults);
});

// 示例代码的使用
dispatch({ type: ActionTypes.FETCH_DATA, url: 'http://example.com/api/1' });
dispatch({ type: ActionTypes.FETCH_DATA, url: 'http://example.com/api/2' });
dispatch({ type: ActionTypes.FETCH_DATA, url: 'http://example.com/api/3' });
dispatch({ type: ActionTypes.FETCH_DATA, url: 'http://example.com/api/4' });
dispatch({ type: ActionTypes.FETCH_DATA, url: 'http://example.com/api/5' });