Javascript合并数组中的多个对象

const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { b: { d: 3 }, e: 4 };

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

const mergedObj = shallowMerge(obj1, obj2);
console.log(mergedObj); // { a: 1, b: { d: 3 }, e: 4 }

const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { b: { d: 3 }, e: 4 };

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

const mergedObj = deepMerge(obj1, obj2);
console.log(mergedObj); // { a: 1, b: { c: 2, d: 3 }, e: 4 }

const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { b: { d: 3 }, e: 4 };

const mergedObj = deepMerge(obj1, obj2);
console.log(mergedObj); // { a: 1, b: { c: 2, d: 3 }, e: 4 }

function hasCircularReference(obj, seen = new WeakSet()) {
  if (typeof obj !== 'object' || obj === null) {
    return false;
  }
  if (seen.has(obj)) {
    return true;
  }
  seen.add(obj);
  for (const key in obj) {
    if (obj.hasOwnProperty(key) && hasCircularReference(obj[key], seen)) {
      return true;
    }
  }
  return false;
}

function safeDeepMerge(obj1, obj2) {
  if (hasCircularReference(obj1) || hasCircularReference(obj2)) {
    throw new Error('Circular reference detected');
  }
  return deepMerge(obj1, obj2);
}