JavaScript-根据id属性合并两个数组
假设我们有两个对象数组，其中第一个包含一些带有用户ID和用户名的对象。
该数组包含带有用户ID和用户地址的对象。
数组是-
const arr1 = [
{"id":"123","name":"name 1"},
{"id":"456","name":"name 2"}
];
const arr2 = [
{"id":"123","address":"address 1"},
{"id":"456","address":"address 2"}
];我们需要编写一个JavaScript函数，该函数接受两个这样的数组并将这两个数组合并以形成第三个数组。
第三个数组应包含相应用户的用户ID，名称和地址对象。
示例
为此的代码将是-
const arr1 = [
{"id":"123","name":"name 1"},
{"id":"456","name":"name 2"}
];
const arr2 = [
{"id":"123","address":"address 1"},
{"id":"456","address":"address 2"}
];
const mergeArrays = (arr1 = [], arr2 = []) => {
let res = [];
res = arr1.map(obj => {
const index = arr2.findIndex(el => el["id"] == obj["id"]);
const { address } = index !== -1 ? arr2[index] : {};
return {
...obj,
address
};
});
return res;
};
console.log(mergeArrays(arr1, arr2));输出结果
控制台中的输出将是-
[
{ id: '123', name: 'name 1', address: 'address 1' },
{ id: '456', name: 'name 2', address: 'address 2' }
]