Laravel合并数组中的重复对象

Question

这是我的输出查询：

array = [
   0: {brand: "Samsung", phone_unit: "J7 pro"}
   1: {brand: "Samsung", phone_unit: "S9"}
   2: {brand: "Samsung", phone_unit: "S7"}
   3: {brand: "Iphone", phone_unit: "iphone 6s"}
   4: {brand: "Iphone", phone_unit: "iphone X"}
]

这就是我想发生的事情

array = [
   0: {
        brand: "Samsung",
        phone_unit: ["J7 pro", "S9", "S7"]
      }
   1: {
        brand: "Iphone",
        phone_unit: ["iphone 6S", "iphone X"]
      }
]

如何使用 map 或 ES6 javascript

Answer 1

您可以通过将数组缩小为由brand分组的对象，然后调用Object.values以获得最终数组来实现：

const array = [
   {brand: "Samsung", phone_unit: "J7 pro"},
   {brand: "Samsung", phone_unit: "S9"},
   {brand: "Samsung", phone_unit: "S7"},
   {brand: "Iphone", phone_unit: "iphone 6s"},
   {brand: "Iphone", phone_unit: "iphone X"}
];

const result = Object.values(array.reduce((acc, {brand, phone_unit}) => {
  if (!(brand in acc)) acc[brand] = {brand, phone_unit: [phone_unit]};
  else acc[brand].phone_unit.push(phone_unit);
  return acc;
}, {}));

console.log(result);