Files

Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683 )

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>

2021-01-12 19:31:00 -07:00

3.2 KiB

Raw Blame History

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
5a24c314108439a4d4036155	发送 Action Data 给 Store	6	301448	send-action-data-to-the-store

--description--

到目前为止，你已经学会了如何将 action dispatch 给 Redux store，但到目前为止，这些 action 并未包含除 type之外的任何信息。你还可以发送特定数据和 action 一起。事实上，这是非常常见的，因为 action 通常源于一些用户交互，并且往往会携带一些数据，Redux store 经常需要知道这些数据。

--instructions--

在代码编辑器中定义了一个基础的notesReducer()和addNoteText() action creator。完成addNoteText()函数的主体，这样它就会返回一个action对象。该对象应该包含一个type属性，其值为ADD_NOTE，还有一个text属性通过 action creator 将值设置为note。当你调用 action creator 时，你需要传入可以访问该对象的特定注释信息。

接下来，完成在notesReducer()中编写的switch语句。你需要添加一个处理addNoteText()操作的选项。只要存在ADD_NOTE类型的 action，就应该触发 case，并且它应该在传入的action上返回text属性作为新的state

这个 action 将在代码底部发送。一旦完成后，运行代码并观察控制台。这就是将特定于 action 的数据发送到 store 并在更新 store state时使用它所需的全部内容。

--hints--

action creator addNoteText应该返回一个包含type和text的对象。

assert(
  (function () {
    const addNoteFn = addNoteText('__TEST__NOTE');
    return addNoteFn.type === ADD_NOTE && addNoteFn.text === '__TEST__NOTE';
  })()
);

dispatch 一个 action creator 是addNoteText的actionADD_NOTE，应将state更新为 action creator 传递的字符串。

assert(
  (function () {
    const initialState = store.getState();
    store.dispatch(addNoteText('__TEST__NOTE'));
    const newState = store.getState();
    return initialState !== newState && newState === '__TEST__NOTE';
  })()
);

--seed--

--seed-contents--

const ADD_NOTE = 'ADD_NOTE';

const notesReducer = (state = 'Initial State', action) => {
  switch(action.type) {
    // Change code below this line

    // Change code above this line
    default:
      return state;
  }
};

const addNoteText = (note) => {
  // Change code below this line

  // Change code above this line
};

const store = Redux.createStore(notesReducer);

console.log(store.getState());
store.dispatch(addNoteText('Hello!'));
console.log(store.getState());

--solutions--

const ADD_NOTE = 'ADD_NOTE';

const notesReducer = (state = 'Initial State', action) => {
  switch(action.type) {
    // Change code below this line
    case ADD_NOTE:
      return action.text;
    // Change code above this line
    default:
      return state;
  }
};

const addNoteText = (note) => {
  // Change code below this line
  return {
    type: ADD_NOTE,
    text: note
  }
  // Change code above this line
};

const store = Redux.createStore(notesReducer);

console.log(store.getState());
store.dispatch(addNoteText('Hello Redux!'));
console.log(store.getState());

3.2 KiB Raw Blame History Unescape Escape