小编Ali*_*eed的帖子

我见过传奇以三种方式听取行动:

1. while(true)take()

function* onUserDetailsRequest() {
  while(true) {
    const { userId } = yield take(USER_DETAILS_REQUESTED);
    const response = yield call(fetchUserDetails, userId);
    put(USER_DETAILS_RECEIVED, response);
  }
}    

2. while(take())

function* onUserDetailsRequest() {
  while(yield take(USER_DETAILS_REQUESTED)) {
    const userId = yield select(userSelectorFn);
    const response = yield call(fetchUserDetails, userId);
    put(USER_DETAILS_RECEIVED, response);
  }
}    

3. takeEvery()

function* onUserDetailsRequest() {
  yield takeEvery(USER_DETAILS_REQUESTED, function* (action) {
    const { userId } = action;
    const response = yield call(fetchUserDetails, userId);
    put(USER_DETAILS_RECEIVED, response);
  }
}

各自的优点和缺点是什么？在哪种情况下我们应该使用另一种情况？

是否有使用终极版,传奇的任何优势yield all([])了ES6的内置yield []？

为了并行运行多个操作,redux-saga建议:

const result = yield all([
  call(fetchData),
  put(FETCH_DATA_STARTED),
]);

但是没有all()方法可以实现同样的目的:

const result = yield [
  call(fetchData),
  put(FETCH_DATA_STARTED),
];

哪一个更好？为什么？