如何迭代对象并将值动态分配给键

Question

大家好，

所以我正在努力解决以下问题：我有一个带有一些键和值的对象。 我想把它们拿出来做一个新的对象数组。 这是代码，因为它更好地描述了我的问题。

 const sourceObj = { test1: "a", test2: "b", test3: "c", test4: "d", test5: "e" }; const myTable = []; for (let value of sourceObj) { for (let i = 1; i < 6; i++) { const targetObject = { foo: "foo", year: value.test + i, bar: "bar" }; myTable.push(targetObject); } } console.log(myTable); // expected output // [ // { // foo: "foo", // year: "a", // bar: "bar" // }, // { // foo: "foo", // year: "b", // bar: "bar" // }, // ... // { // foo: "foo", // year: "e", // bar: "bar" // }, // ]

Answer 1

您可以迭代对象键并使用方法 array.map 来获取预期的对象

 const sourceObj = { test1: "a", test2: "b", test3: "c", test4: "d", test5: "e" }; const myTable = Object.keys(sourceObj).map((key) => { return { foo: "foo", year: sourceObj[key], bar: "bar" }; }); console.log(myTable);

Answer 2

您可以简单地使用Object.values并映射它

 const sourceObj = { test1: "a", test2: "b", test3: "c", test4: "d", test5: "e" }; const myTable = Object.values(sourceObj).map(year => ({ foo: "foo", year, bar: "bar" })) console.log(myTable);

Answer 3

const sourceObj = {
  test1: "a",
  test2: "b",
  test3: "c",
  test4: "d",
  test5: "e"
};

const myTable = [];

for(item in sourceObj){
  myTable.push(
    {
      foo : "foo",
      year : sourceObj[item],
      bar : "bar"
    }
  );
}

console.log(myTable);

Answer 4

尝试这个 ：

let myTable = Object.values(sourceObj).map((element) => ({
    foo: "foo",
    year: element,
    bar: "bar"
 }));

Answer 5

您可以使用for...in语句

for...in语句迭代对象的所有可枚举属性，这些属性以字符串为键（忽略以符号为键的），包括继承的可枚举属性。

 const sourceObj = { test1: "a", test2: "b", test3: "c", test4: "d", test5: "e" }; const myTable = []; for (let key in sourceObj) { const targetObject = { foo: "foo", year: sourceObj[key], bar: "bar" }; myTable.push(targetObject); } console.log(myTable);