对象合并

function shallowMerge(obj1, obj2) {
  return { ...obj1, ...obj2 };
}

const objA = { a: 1, b: 2 };
const objB = { b: 3, c: 4 };
const mergedObj = shallowMerge(objA, objB);
console.log(mergedObj); // 输出: { a: 1, b: 3, c: 4 }

function deepMerge(obj1, obj2) {
  const result = { ...obj1 };
  for (const key in obj2) {
    if (obj2.hasOwnProperty(key)) {
      if (typeof obj2[key] === 'object' && !Array.isArray(obj2[key]) && obj2[key] !== null) {
        result[key] = deepMerge(result[key] || {}, obj2[key]);
      } else {
        result[key] = obj2[key];
      }
    }
  }
  return result;
}

const objA = { a: 1, b: { c: 2 } };
const objB = { b: { d: 3 }, e: 4 };
const mergedObj = deepMerge(objA, objB);
console.log(mergedObj); // 输出: { a: 1, b: { c: 2, d: 3 }, e: 4 }