如何使用 JavaScript (JSON) 從同一行中的另一個值中找到值？

Question

我正在嘗試從一個數字中獲取“正確答案”。

這是 JSON 的示例：

{
  "questions": [
    {
      "number": 3,
      "question": "☀️ ➕ 🌼 = ?",
      "answers": [
        "🌻sunflower",
        "BIRTHDAY",
        "iPhone",
        "MOON CAKE"
      ],
      "correctAnswers": [
        "🌻sunflower"
      ],
      "random": true,
      "timeLimit": "24"
    },
    {
      "number": 1,
      "question": "⭐️ ➕ 🐟 =❓ ",
      "answers": [
        "STAR FISH",
        "iPhone",
        "MOON CAKE",
        "HOT DOG"
      ],
      "correctAnswers": [
        "STAR FISH"
      ],
      "random": true,
      "timeLimit": "20"
    },
    {
      "number": 7,
      "question": "👁 ➕ ☎ = ",
      "answers": [
        "SUNGLASSES",
        "SUNFLOWER",
        "HOUSEPAINT",
        "IPHONE"
      ],
      "correctAnswers": [
        "IPHONE"
      ],
      "random": true,
      "timeLimit": 15
    },
  ]
}

我試圖找到“數字”：1，或“問題”中的隨機數，然后從該數字中找到“正確答案”。

Answer 1

const array = {
  "questions": [
    {
      "number": 3,
      "question": "☀️ ➕ 🌼 = ?",
      "answers": [
        "🌻sunflower",
        "BIRTHDAY",
        "iPhone",
        "MOON CAKE"
      ],
      "correctAnswers": [
        "🌻sunflower"
      ],
      "random": true,
      "timeLimit": "24"
    },
    {
      "number": 1,
      "question": "⭐️ ➕ 🐟 =❓ ",
      "answers": [
        "STAR FISH",
        "iPhone",
        "MOON CAKE",
        "HOT DOG"
      ],
      "correctAnswers": [
        "STAR FISH"
      ],
      "random": true,
      "timeLimit": "20"
    },
    {
      "number": 7,
      "question": "👁 ➕ ☎ = ",
      "answers": [
        "SUNGLASSES",
        "SUNFLOWER",
        "HOUSEPAINT",
        "IPHONE"
      ],
      "correctAnswers": [
        "IPHONE"
      ],
      "random": true,
      "timeLimit": 15
    },
  ]
};

const { questions } = array;

// Find by number
const correctAnswersByNumber = qNumber => {
  const q = questions.find(({ number }) => number === qNumber);
  if (!q) {
    return false;
  }

  return q.correctAnswers;
};
console.log(correctAnswersByNumber(3)); // Question by number === 3

// Random question
const randomCorrectAnswers = questions[Math.floor(Math.random() * questions.length)].correctAnswers;
console.log(randomCorrectAnswers);

Answer 2

使用隨機選擇一個隨機問題。 然后顯示正確的屬性。

 var data = { "questions": [ { "number": 3, "question": "☀️ ➕ 🌼 = ?", "answers": [ "🌻sunflower", "BIRTHDAY", "iPhone", "MOON CAKE" ], "correctAnswers": [ "🌻sunflower" ], "random": true, "timeLimit": "24" }, { "number": 1, "question": "⭐️ ➕ 🐟 =❓ ", "answers": [ "STAR FISH", "iPhone", "MOON CAKE", "HOT DOG" ], "correctAnswers": [ "STAR FISH" ], "random": true, "timeLimit": "20" }, { "number": 7, "question": "👁 ➕ ☎ = ", "answers": [ "SUNGLASSES", "SUNFLOWER", "HOUSEPAINT", "IPHONE" ], "correctAnswers": [ "IPHONE" ], "random": true, "timeLimit": 15 }, ] }; // Let's choose a random question let question = data['questions'][Math.floor(Math.random() * data['questions'].length)]; console.log(question.question, question.correctAnswers)