javascript - 如何根据另一个对象数组的键形成一个对象？

Question

我想根据另一个对象的键形成一个对象，并将值设置为空字符串；

const availableList = [
  {id: 1, key: 'emp_id'},
  {id: 2, key: 'firstname'},
  {id: 3, key: 'lastname'},
  {id: 4, key: 'mobile'},
  {id: 5, key: 'email'},
]
    
availableList .forEach(key => result [key] = availableList [key]);

预期输出:

result = {
  emp_id: '', 
  firstname: '', 
  lastname: '', 
  mobile: '', 
  email: ''
}

Answer 1

您可以将 .reduce 与对象析构和对象的计算属性一起使用

const availableList = [
  { id: 1, key: "emp_id" },
  { id: 2, key: "firstname" },
  { id: 3, key: "lastname" },
  { id: 4, key: "mobile" },
  { id: 5, key: "email" },
]

const res = availableList.reduce(
  (finalObj, iteratedObj) => ({ ...finalObj, [iteratedObj.key]: "" }),
  {}
)

console.log(res)

引用资料

Array.property.reduce

Spread syntax

Destructing assignment

Computed property names (ES 2015)