如何查询对象中是否存在指定术语并返回该术语？（示例：查询answer1）

给定的对象里，answer1是存在的，对应的返回结果为 answer1。

实现示例（以JavaScript为例） #

const response = {
  "101": "answer1",
  "201": "answer2",
  "301": "answer3",
  "100": "answer4",
  "200": "answer5",
  "300": "answer6",
  "111": "answer7",
  "211": "answer8",
  "311": "answer9"
};

function checkAndReturnTerm(obj, targetTerm) {
  // 遍历对象所有值，匹配目标术语
  for (const val of Object.values(obj)) {
    if (val === targetTerm) {
      return val;
    }
  }
  return null; // 术语不存在时返回null
}

// 执行查询
const result = checkAndReturnTerm(response, "answer1");
console.log(result); // 输出：answer1

内容的提问来源于stack exchange，提问作者Chirag Gupta