Change the server's response into a usable object using JavaScript

Question

Change the server's response into a usable object using JavaScript

When receiving a response from the server, it appears in this format:

{"value1":1,"value2":45,"value3":"x"} 
{"value1":1,"value2":45,"value3":"x"} 
{"value1":1,"value2":45,"value3":"x"}

The response is in text form.

I'm having trouble parsing the JSON due to an error saying "Unexpected token {". Can someone assist me in converting this into a valid object?

UPDATE 1

The output after using the following code:

const arr = `[${res.replaceAll('\n', ',')}]`

Is:

[{"value1":1,"value2":45,"value3":"x"}, 
{"value1":1,"value2":45,"value3":"x"}, 
{"value1":1,"value2":45,"value3":"x"}]

It seems there is an issue with the last comma when copying the data manually. This error does not occur in that case.

UPDATE 2

Furthermore, the server response contained invisible empty lines that I initially overlooked. Using trim() function fixed this issue.

javascript arrays

Answer 1

Answer №1

To resolve an issue, consider addressing it first on the server side before attempting to fix it on the client side as a last resort.

The text you provided appears to be:

{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}

It contains whitespace at the end. You can remove all spaces around it, replace line breaks with separators, and enclose everything in square brackets. Then, parse it as JSON:

JSON.parse(`[${res.trim().replaceAll('\n', ',')}]`)

This will create an array of objects that you can manipulate as needed.

For example:

const res = `{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}`;

const arr = JSON.parse(`[${res.trim().replaceAll('\n', ',')}]`);
console.log(arr);
console.log(arr[1].value2);

Answer 2

To resolve an issue, consider addressing it first on the server side before attempting to fix it on the client side as a last resort.

The text you provided appears to be:

{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}

It contains whitespace at the end. You can remove all spaces around it, replace line breaks with separators, and enclose everything in square brackets. Then, parse it as JSON:

JSON.parse(`[${res.trim().replaceAll('\n', ',')}]`)

This will create an array of objects that you can manipulate as needed.

For example:

const res = `{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}
{"value1":1,"value2":45,"value3":"x"}`;

const arr = JSON.parse(`[${res.trim().replaceAll('\n', ',')}]`);
console.log(arr);
console.log(arr[1].value2);

Answer 3

Answer №2

UPDATE: My interpretation of the question was off, so here is a revised response:

const data = `{"value1":1,"value2":45,"value3":"x"}\n{"value1":1,"value2":45,"value3":"x"}\n{"value1":1,"value2":45,"value3":"x"}`;

const dataArray = data.split("\n");

let finalOutputArray = [];

dataArray.forEach(item => {
    
    let inputObject = JSON.parse(item);

    let outputValueArray = [];

    // iterate through all values in the object
    for (const key in inputObject) {

        // append the new value to the array
        outputValueArray.push(inputObject[key]);
    }
    
    finalOutputArray.push(outputValueArray);
});

console.log(finalOutputArray); // should display "[ [1, 2, 3, ...], [1, 2, 3, ...], ...]"

Answer 4

UPDATE: My interpretation of the question was off, so here is a revised response:

const data = `{"value1":1,"value2":45,"value3":"x"}\n{"value1":1,"value2":45,"value3":"x"}\n{"value1":1,"value2":45,"value3":"x"}`;

const dataArray = data.split("\n");

let finalOutputArray = [];

dataArray.forEach(item => {
    
    let inputObject = JSON.parse(item);

    let outputValueArray = [];

    // iterate through all values in the object
    for (const key in inputObject) {

        // append the new value to the array
        outputValueArray.push(inputObject[key]);
    }
    
    finalOutputArray.push(outputValueArray);
});

console.log(finalOutputArray); // should display "[ [1, 2, 3, ...], [1, 2, 3, ...], ...]"

Change the server's response into a usable object using JavaScript

Answer №1

Answer №2

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