Convert two array into JSON object

Question

I am trying to build JSON from two array. One array contains field_name and other contains field_value of corresponding field_name

    var field_name = ["sys_id","country","calendar_integration","user_password","last_login_time"]
var field_value = ["6816f79cc0a8016401c5a33be04be441","United State","Outlook","Password1","2019-03-19 09:48:41"];

Expected output:

output = { "sys_id" : "6816f79cc0a8016401c5a33be04be441",
        "country" : "United State",
        "calendar_integration" : "Outlook",
        "user_password": "Password1",
        "last_login_time": "2019-03-19 09:48:41"
        }

Anyone can help here, how to achieve this in JavaScript.

Possible duplicate of Merge two arrays into one Json object

GuillaumeRZ
– GuillaumeRZ

2019-03-19 19:31:57 +00:00
Commented Mar 19, 2019 at 19:31 — GuillaumeRZ
– GuillaumeRZ, Commented Mar 19, 2019 at 19:31

Maheer Ali · Accepted Answer · 2019-03-19 19:33:29Z

1

You can do that using reduce().Set value from field_name at index i as key and value as field_value at current index

var field_name = ["sys_id","country","calendar_integration","user_password","last_login_time"]
var field_value = ["6816f79cc0a8016401c5a33be04be441","United State","Outlook","Password1","2019-03-19 09:48:41"];

let res = field_name.reduce((ac,a,i) => ({...ac,[a]:field_value[i]}),{});
console.log(res);

You can also use forEach() in the same way.

var field_name = ["sys_id","country","calendar_integration","user_password","last_login_time"]
var field_value = ["6816f79cc0a8016401c5a33be04be441","United State","Outlook","Password1","2019-03-19 09:48:41"];
let obj = {};
field_name.forEach((a,i) => obj[a] = field_value[i]);
console.log(obj)

edited Mar 19, 2019 at 19:33

answered Mar 19, 2019 at 19:28

Maheer Ali

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1 Comment

snowcoder Over a year ago

Thanks Maheer, this is perfect !!

GuillaumeRZ · Accepted Answer · 2019-03-19 19:30:32Z

1

You can try something like that if both array are always with the same size :

let JSONOutput = {}

for (let i = 0; i < firstArray.length; i++) {
    JSONOutput[firstArray[i]] = secondArray[i];
}

answered Mar 19, 2019 at 19:30

GuillaumeRZ

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Comments

H.K · Accepted Answer · 2019-03-19 19:37:29Z

0

Check this solution

var output = {};
field_name.forEach((field, index) => {
     output[field] = field_value[index];
 });

answered Mar 19, 2019 at 19:37

H.K

11 bronze badge

1 Comment

Tamir Klein Over a year ago

user8276566 Welcome to SO and thanks for your help. Will be nice if you can explain a bit why your answer will solve the question to give it the right context

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