如何在嵌套数组中合并散列？

function mergeHashes(arr) {
  let result = {};

  arr.forEach((item) => {
    if (Array.isArray(item)) {
      const mergedHash = mergeHashes(item);
      result = mergeObjects(result, mergedHash);
    } else if (typeof item === 'object') {
      result = mergeObjects(result, item);
    }
  });

  return result;
}

function mergeObjects(obj1, obj2) {
  for (const key in obj2) {
    if (obj2.hasOwnProperty(key)) {
      if (obj1.hasOwnProperty(key)) {
        if (Array.isArray(obj1[key]) && Array.isArray(obj2[key])) {
          obj1[key] = obj1[key].concat(obj2[key]);
        } else if (typeof obj1[key] === 'object' && typeof obj2[key] === 'object') {
          obj1[key] = mergeObjects(obj1[key], obj2[key]);
        }
      } else {
        obj1[key] = obj2[key];
      }
    }
  }

  return obj1;
}

// 示例用法
const nestedArray = [
  { name: 'John', age: 30 },
  { hobbies: ['reading', 'coding'] },
  { address: { city: 'New York', country: 'USA' } },
  [
    { skills: ['JavaScript', 'HTML', 'CSS'] },
    { projects: ['Project A', 'Project B'] }
  ]
];

const mergedHash = mergeHashes(nestedArray);
console.log(mergedHash);