在这种情况下，如何为lodash _.Mergewith编写定制功能？

发布于 2025-02-05 07:07:44 字数 447 浏览 4 评论 0原文

我有两个这样的对象：

var obj3 = {
    customer_id: 1,
    products: { id: 1, name: "Car" },
  };

  var obj4 = {
    customer_id: 1,
    products: { id: 2, name: "Dress" },
  };

预期的对象是：

result = {
    customer_id: 1,
    products: [
      { id: 1, name: "Car" },
      { id: 2, name: "Dress" },
    ],
  };

在这种情况下，如何编写function customizer（）{}？非常感谢您的帮助，我们欢迎以不同的方式提供其他解决方案。

原文

I have two objects like that:

var obj3 = {
    customer_id: 1,
    products: { id: 1, name: "Car" },
  };

  var obj4 = {
    customer_id: 1,
    products: { id: 2, name: "Dress" },
  };

and the expected object is:

result = {
    customer_id: 1,
    products: [
      { id: 1, name: "Car" },
      { id: 2, name: "Dress" },
    ],
  };

How can i write function customizer(){} in this situation?
Thanks so much for your help, and i'll be welcome for other solution with different way.

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挽容 2025-02-12 07:07:44

将对象合并到新对象（{}）。将合并值的默认值设置为空数组。如果密钥是产品 concat。如果没有返回未定义，则将使用merge（）的标准逻辑：

const obj3 = { customer_id: 1, products: { id: 1, name: "Car" }, };
const obj4 = { customer_id: 1, products: { id: 2, name: "Dress" }, };

const result = _.mergeWith({}, obj3, obj4, (v1 = [], v2 = [], key) =>
  key === 'products' ? v1.concat(v2) : undefined
)

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js" integrity="sha512-WFN04846sdKMIP5LKNphMaWzU7YpMyCU245etK3g/2ARYbPK9Ub18eG+ljU96qKRCWh+quCY7yefSmlkQw1ANQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Merge the objects to a new object (the {}). Set the default values of the merged values to empty arrays. If the key is products concat them. If not return undefined, so the standard logic of _.merge() would be used:

const obj3 = { customer_id: 1, products: { id: 1, name: "Car" }, };
const obj4 = { customer_id: 1, products: { id: 2, name: "Dress" }, };

const result = _.mergeWith({}, obj3, obj4, (v1 = [], v2 = [], key) =>
  key === 'products' ? v1.concat(v2) : undefined
)

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js" integrity="sha512-WFN04846sdKMIP5LKNphMaWzU7YpMyCU245etK3g/2ARYbPK9Ub18eG+ljU96qKRCWh+quCY7yefSmlkQw1ANQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

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