如何在nodejs中为数组/对象数据创建层次结构？

function createHierarchy(data) {
  if (Array.isArray(data)) {
    return data.map(item => createHierarchy(item));
  } else if (typeof data === 'object' && data !== null) {
    const result = {};
    for (let key in data) {
      result[key] = createHierarchy(data[key]);
    }
    return result;
  } else {
    return data;
  }
}

const data = [
  { id: 1, name: 'John', children: [{ id: 2, name: 'Alice' }] },
  { id: 3, name: 'Bob' }
];

const hierarchy = createHierarchy(data);
console.log(hierarchy);

function createHierarchy(data) {
  const stack = [...data];
  const result = {};

  while (stack.length) {
    const item = stack.pop();
    const { id, name, children } = item;

    if (!result[id]) {
      result[id] = { id, name, children: [] };
    }

    if (Array.isArray(children)) {
      children.forEach(child => {
        stack.push(child);
        result[id].children.push(child.id);
      });
    }
  }

  return result;
}

const data = [
  { id: 1, name: 'John', children: [{ id: 2, name: 'Alice' }] },
  { id: 3, name: 'Bob' }
];

const hierarchy = createHierarchy(data);
console.log(hierarchy);