合并两个对象数组，但在某个键/值上具有唯一性

function mergeArraysByUniqueKey(arr1, arr2, uniqueKey) {
  let mergedArray = [];

  // 遍历第一个数组
  for (let obj1 of arr1) {
    let newObj = {};
    newObj[uniqueKey] = obj1[uniqueKey];

    // 复制其他属性到新对象
    for (let key in obj1) {
      if (key !== uniqueKey) {
        newObj[key] = obj1[key];
      }
    }

    mergedArray.push(newObj);
  }

  // 遍历第二个数组
  for (let obj2 of arr2) {
    let isUnique = true;

    // 检查唯一键/值是否已存在于结果数组中
    for (let obj of mergedArray) {
      if (obj[uniqueKey] === obj2[uniqueKey]) {
        isUnique = false;
        break;
      }
    }

    if (isUnique) {
      let newObj = {};
      newObj[uniqueKey] = obj2[uniqueKey];

      // 复制其他属性到新对象
      for (let key in obj2) {
        if (key !== uniqueKey) {
          newObj[key] = obj2[key];
        }
      }

      mergedArray.push(newObj);
    }
  }

  return mergedArray;
}

// 示例用法
let array1 = [
  { id: 1, name: 'John' },
  { id: 2, name: 'Jane' },
  { id: 3, name: 'Bob' }
];

let array2 = [
  { id: 2, age: 25 },
  { id: 4, age: 30 },
  { id: 5, age: 35 }
];

let mergedArray = mergeArraysByUniqueKey(array1, array2, 'id');
console.log(mergedArray);