중첩된 JavaScript 개체를 통해 재귀적으로 반복하는 방법은 무엇입니까?

<code class="js">const iterate = (obj) => {
  Object.keys(obj).forEach((key) => {
    console.log(`key: ${key}, value: ${obj[key]}`);

    if (typeof obj[key] === 'object' && obj[key] !== null) {
      iterate(obj[key]);
    }
  });
};

console.log(iterate({ ...cars }));</code>

<code class="js">const iterate = (obj) => {
  const stack = [obj];
  while (stack?.length > 0) {
    const currentObj = stack.pop();
    Object.keys(currentObj).forEach((key) => {
      console.log(`key: ${key}, value: ${currentObj[key]}`);
      if (typeof currentObj[key] === 'object' && currentObj[key] !== null) {
        stack.push(currentObj[key]);
      }
    });
  }
};

console.log(iterate({ ...cars }));</code>