The JSON reviver function is still not returning anything even when explicitly using the return

Question

The JSON reviver function is still not returning anything even when explicitly using the return

function _quotedText(data, config) {
    var pathKeys=config.customKey;  
    console.log(pathKeys);         //prints os_platform
    var inAuth_data=(JSON.parse(JSON.parse(JSON.parse(data["event.fields.custom_fields.inauth_device_data"])), (key, value) => {
        if (key == pathKeys)
        {
            console.log(value);     //prints Android
            return value;           //returns undefined
        }
    }));

    console.log(inAuth_data);       //prints undefined
    return inAuth_data;             //returns undefined
}

I have encountered a similar issue before and attempted various solutions suggested by others but I am still facing the problem. Why does the function return 'undefined'?

The JSON data causing the trouble is as follows:

"\"{\\\"deviceInfo\\\":{\\\"permanentId\\\":\\\"23434433-3333-4444-9581-f9cb641d28f5\\\",\\\"publicSigningKey\\\":\\\"MIIBIDANBgkqhkiG9w0BAQEFAAOCAQ0AMIIBCAKCAQEAzMRW6jXVgqX0QV0EA9h2XnnPvntER5yqPKvD+yLKtxXzBCYMzygEM1nlwBRZhVpNJFvzZ2X+oTLGasdbasjhddasdu0PAWIc1AqKMt6rDEJv4a8bgqqAnXXnvR/QjwtsIq3T59LqivcoB2IPGq7Mof7yRJXKtrEOK2a1b8ixWJ5MBZ06drONhMkzeDTKjenMSM0Hf3BFTlXKCF...

javascript json reviver-function

Answer 1

Answer №1

After spending some time struggling with it, I finally managed to figure out the solution. It turned out that the function was called for each object in the JSON. And after

if (key == pathKeys)

was verified, the value was printed and returned. However, there were additional objects in the JSON string following the matched key, which resulted in them being replaced on the variable inAuth_data.

Therefore, I simply had to create another variable outside the reviver function and set its value when the condition was met.

function _quotedText(data, config) {
var pathKeys=config.customKey;  
console.log(pathKeys);         //displays os_platform
var data = undefined;
var inAuth_data =(JSON.parse(JSON.parse(JSON.parse(data["event.fields.custom_fields.inauth_device_data"])), (key, value) => {
    if (key == pathKeys)
    {
        console.log(value);     //displays Android
        data = value;           //Assigning value of value to data
    }
  }));

console.log(inAuth_data);       //displays Android
return inAuth_data;             //returns Android

}

A big thank you to @evolutionxbox for collaborating with me on this issue.

Answer 2

After spending some time struggling with it, I finally managed to figure out the solution. It turned out that the function was called for each object in the JSON. And after

if (key == pathKeys)

was verified, the value was printed and returned. However, there were additional objects in the JSON string following the matched key, which resulted in them being replaced on the variable inAuth_data.

Therefore, I simply had to create another variable outside the reviver function and set its value when the condition was met.

function _quotedText(data, config) {
var pathKeys=config.customKey;  
console.log(pathKeys);         //displays os_platform
var data = undefined;
var inAuth_data =(JSON.parse(JSON.parse(JSON.parse(data["event.fields.custom_fields.inauth_device_data"])), (key, value) => {
    if (key == pathKeys)
    {
        console.log(value);     //displays Android
        data = value;           //Assigning value of value to data
    }
  }));

console.log(inAuth_data);       //displays Android
return inAuth_data;             //returns Android

}

A big thank you to @evolutionxbox for collaborating with me on this issue.

The JSON reviver function is still not returning anything even when explicitly using the return

Answer №1

Similar questions

Trouble with Background Image Display in Internet Explorer 8

Using Jquery to swap out div elements and reinitialize code after selecting a menu <a href>link<</a>

Receiving JSON data in TypeScript and displaying it in a structured table format

Using jQuery and Laravel framework to handle a POST request

How to incorporate a delay in ng-repeat using AngularJS

Creating a resilient node websocket client with enhanced security (overcoming the challenge of verifying the initial certificate)

Looking for assistance with parsing a JSON string within a SQL stored procedure and extracting the values of its attributes

Using MediaQuery from react-responsive to selectively hide individual JSX attributes

Submit button in React form not activating the onSubmit method

recording the results of a Node.js program in PHP using exec

Basic parallax application, failing to achieve the desired impact

Utilizing AJAX to send RSS feeds to a Django view

What are some methods for transferring the state variable's value from one component to another in React?

Ways to extract a single digit from the total sum of a date in the format of 15-06-2015

Can you guide me on implementing an onclick event using HTML, CSS, and JavaScript?

"In JavaScript, the use of double quotes within a string is

Is it possible to trigger a Bootstrap 5.2 Popover within an "if" statement?

Unable to alter the vertex color in three.js PointCloud

What is the best way to implement client side validation for a related input field using JavaScript in a Rails application?

Is it necessary for me to use a .jsx extension when saving my React component files?