这就是如何将两个数组组合成一个数组，并使用Array#map和Array#find为每个答案提供相应的问题：

const questions = [ { id: 1, text: "question1" }, { id: 2, text: "question2" }, { id: 3, text: "question3" }];

const answers = [ { id: 1, text: "answer1", questions_id: 1 }, { id: 2, text: "answer2", questions_id: 1 }, { id: 3, text: "answer3", questions_id: 1 }, { id: 4, text: "answer4", questions_id: 1 }];

const result = answers.map(a => ({
  ...a,
  question: {...questions.find(q => q.id === a.questions_id)}
}));

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

你可以使用过滤器的方法来得到与问题相关联的答案。

const questions = [{
  id: 1,
  text: "question1"
}, {
  id: 2,
  text: "question2"
}, {
  id: 3,
  text: "question3"
}]

const answers = [{
  id: 1,
  text: "answer1",
  questions_id: 1
}, {
  id: 2,
  text: "answer2",
  questions_id: 1
}, {
  id: 3,
  text: "answer3",
  questions_id: 1
}, {
  id: 4,
  text: "answer4",
  questions_id: 1
}]

const data = questions.map((que) => {
  return {
    ...que,
    answer: answers.filter((ans) => ans.questions_id === que.id)
  }
})

console.log("data is ================" , data);