從Node.js Readline的答案塊使用ES6生成器

Question

我試圖將注意力集中在生成器的概念上，並為此構建示例命令行“ game”。 但是，在第二個問題中，我輸入的輸入顯示為三倍，即一次輸入“ e”時顯示為“ eee”。 我究竟做錯了什么？

似乎每個questionToAnswer函數實例都會創建一個新的readline接口，並且沒有正確關閉它，這將解釋輸入的三倍。 但是， rl.close; 應該關閉界面AFAIK。

const readline = require('readline');

const environments = ['forest', 'lava cave', 'island hut', 'mountainside shack', 'valley'];

const questionToAnswer = (q, a = null) => {
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });
  rl.question(q, (answer) => {
    if (a !== null) console.log(a, answer);
      rl.close;
      theStory.next();
  });
}

function* eventsOfStory(e) {
  console.log('Welcome to the Great Adventure!');
  yield questionToAnswer('What shall ye name your hero? ', 'Alright! Your hero\'s name shall be');
  yield questionToAnswer(`You wake up in a ${environments[Math.floor(Math.random() * environments.length)]}.`);
  yield questionToAnswer('How will you survive?', 'Sounds like a plan!');
  yield endOfStory();
}

const endOfStory = () => {
  console.log('End of story.');
  process.exit();
}

// iterator
let theStory = eventsOfStory();

theStory.next();

期望的結果是，在回答當前問題或在顯示事實並且沒有預期答案時，在回答當前問題或按Enter鍵之后觸發任何后續事件。

Answer 1

您的rl.close; 應該是rl.close(); 。
（ rl.close是一個函數，因此您需要調用它以關閉接口）

參見Readline rl.close（）

例如：

const readline = require('readline');

const environments = ['forest', 'lava cave', 'island hut', 'mountainside shack', 'valley'];

const questionToAnswer = (q, a = null) => {
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });
  rl.question(q, (answer) => {
    if (a !== null) console.log(a, answer);
      rl.close();
      theStory.next();
  });
}

function* eventsOfStory(e) {
  console.log('Welcome to the Great Adventure!');
  yield questionToAnswer('What shall ye name your hero? ', 'Alright! Your hero\'s name shall be');
  yield questionToAnswer(`You wake up in a ${environments[Math.floor(Math.random() * environments.length)]}.`);
  yield questionToAnswer('How will you survive?', 'Sounds like a plan!');
  yield endOfStory();
}

const endOfStory = () => {
  console.log('End of story.');
  process.exit();
}

// iterator
let theStory = eventsOfStory();

theStory.next();