How to group array as a key to an object

Question

I'm struggling to group array as a key to an object.

var a = ["fruit1", "fruit2", "fruit3"]
var b = ["apple", "banana", "Orange"];
var obj = {};
a.forEach((x) => {
    b.forEach((y) => {

        obj[x] = y;
    })

})
console.log(obj)

OUTPUT:

{fruit1:apple,fruit2:banana:fruit3:orange}

Could any one help me..

Maseeha Tasneem
– Maseeha Tasneem

2021-06-26 14:42:20 +00:00
Commented Jun 26, 2021 at 14:42 — Maseeha Tasneem
– Maseeha Tasneem, Commented Jun 26, 2021 at 14:42

vsemozhebuty · Accepted Answer · 2021-06-26 14:45:53Z

2

In the inner loop you rewrite all object values with the last element of b. Try this to utilize the index argument of .forEach():

var a = ["fruit1", "fruit2", "fruit3"];
var b = ["apple", "banana", "Orange"];
var obj = {};

a.forEach((x, i) => {
  obj[x] = b[i];
});

console.log(obj)

edited Jun 26, 2021 at 14:45

answered Jun 26, 2021 at 14:43

vsemozhebuty

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Comments

Nina Scholz · Accepted Answer · 2021-06-26 15:26:23Z

1

You could build an array of entries and then an object from it.

const
    keys = ["fruit1", "fruit2", "fruit3"],
    values = ["apple", "banana", "Orange"],
    result = Object.fromEntries(keys.map((key, i) => [key, values[i]]));

console.log(result);

answered Jun 26, 2021 at 15:26

Nina Scholz

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Comments

Mohammad Hossein Dolatabadi · Accepted Answer · 2022-01-02 14:36:17Z

1

You can use zipObj function from ramda library which convert your arrays to an object just like below:

const a = ["fruit1", "fruit2", "fruit3"]
const b = ["apple", "banana", "Orange"];
const obj = R.zipObj(a, b) //{"fruit1": "apple", "fruit2": "banana", "fruit3": "Orange"}
console.log(obj)

edited Jan 2, 2022 at 14:36

answered Jun 26, 2021 at 15:08

Mohammad Hossein Dolatabadi

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