如何将一个对象的值复制到另一个对象的键中？

Question

I have 2 Objects.

Object1:

      {
         "a": "XXXXX",
         "b": "YYYYY",
         "c": "ZZZZZ"
      }

and Object2:

    {
        "a": "KKKKK",
        "b": "LLLLL",
        "c": "MMMMM"
    } 

both have the same length and same keys at the same index, but different values.

Result should be:

    {
        "XXXXX": "KKKKK",
        "YYYYY": "LLLLL",
        "ZZZZZ": "MMMMM"
    } 

i've tried:

    for (let el in Object2){
      el = Object1[el]      
    }

but its not working. What i'm doing wrong?

Answer 1

const x = {
   "a": "XXXXX",
   "b": "YYYYY",
   "c": "ZZZZZ"
}

const y = {
  "a": "KKKKK",
  "b": "LLLLL",
  "c": "MMMMM"
} 

const z = Object.keys(x).reduce((acc, key) => {
  acc[x[key]] = y[key]
  return acc
},{})

console.log(z)

Answer 2

We can use Array.prototype.reduce and Object.keys to iterate over the keys of the first object and use its values as the keys for the result object:

 const obj1 = { "a": "XXXXX", "b": "YYYYY", "c": "ZZZZZ" } const obj2 = { "a": "KKKKK", "b": "LLLLL", "c": "MMMMM" } const result = Object.keys(obj1).reduce((acc, ele, idx) => { acc[obj1[ele]] = obj2[ele]; return acc; }, {}); console.log(result); 

Answer 3

You can also use Object.assign with Object.values :

 var obj1 = { "a": "XXXXX", "b": "YYYYY", "c": "ZZZZZ" }; var obj2 = { "a": "KKKKK", "b": "LLLLL", "c": "MMMMM" }; var obj3 = Object.assign(...Object.values(obj1).map((k, i) => ({[k]: Object.values(obj2)[i]}))); console.log(obj3); 

Or, use a forEach :

 var obj1 = { "a": "XXXXX", "b": "YYYYY", "c": "ZZZZZ" }; var obj2 = { "a": "KKKKK", "b": "LLLLL", "c": "MMMMM" }; var obj3 = {}; Object.values(obj1).forEach((key, i) => obj3[key] = Object.values(obj2)[i]); console.log(obj3); 

Answer 4

you can use Object.Values + reduce something like this:

 const a = { "a": "XXXXX", "b": "YYYYY", "c": "ZZZZZ" } const b = { "a": "KKKKK", "b": "LLLLL", "c": "MMMMM" } var res = Object.values(a).reduce((newObject, value, index) => { newObject[value] = Object.values(b)[index] return newObject; }, {}); console.log(res) 

Answer 5

We can use Array.prototype.reduce and Object.entries to iterate over the keys of the first object and use its values as the keys for the result object:

 const obj1 = { "a": "XXXXX", "b": "YYYYY", "c": "ZZZZZ" } const obj2 = { "a": "KKKKK", "b": "LLLLL", "c": "MMMMM" } const result = Object.entries(obj1).reduce((acc, ele) => { acc[ele[1]] = obj2[ele[0]]; return acc; }, {}); console.log(result); 

Answer 6

You can loop through the keys and set the key and value of the output object based on the value in the input objects

 const o1 = { a: "XXXXX", b: "YYYYY", c: "ZZZZZ" }, o2 = { a: "KKKKK", b: "LLLLL", c: "MMMMM" }, output = {}; for (let key in o1) output[o1[key]] = o2[key] console.log(output)