javascript - 带有映射的javascript中以特定格式显示的数组

Question

需要以特定格式显示数组。输入数组:

let userList = [
  {"id": "12356","username": "test@gmail.com"},
  {"id": "333333", "username": "test1@gmail.com"}
]
let userArray = [
  {"username": "test@gmail.com","sharedPaper": "some paper"}
]

预期结果:

let resultArr = [
  {"id":"12356","username": "test@gmail.com","sharedPaper": "some paper"}
]

Answer 1

您可以使用filter 和map 方法(假设username 是唯一的)

const userList = [{
  "id": "12356",
  "username": "test@gmail.com"
}, {
  "id": "333333",
   "username": "test1@gmail.com"
 }];
const userArray = [{"username": "test@gmail.com","sharedPaper": "some paper"}];

const result = userList
  .filter(user => userArray.find(u => u.username === user.username))
  .map(user => {
      const userAdditionalData = userArray.find(u => u.username === user.username);
      return {
         ...user,
         ...userAdditionalData
      }
});

console.log(result)