What is the best way to convert a JSON string from a specific array into an array object?

Question

What is the best way to convert a JSON string from a specific array into an array object?

JSON object:

{
    "data": {
        "myStatus": "[1 2 21 0 50 0 0 0],[2 1 3 1 50 0 0 0]"
    },
    "success": true
}

Upon converting to the JSON object, it appears that the myStatus is being treated as a string. The goal is to parse it as an Array instead.

Typically, the JSON object should look like this:

var jsonObj= JSON.parse(<abovestring>);
jsonObj.data.myStatus[0] => [1 2 21 0 50 0 0 0];
jsonObj.data.myStatus[0][0] => 1
jsonObj.data.myStatus[0][1] => 2
jsonObj.data.myStatus[0][2] => 21

Is there a way to split it in the required format?

javascript arrays json

Answer 1

Answer №1

To achieve this, you can utilize the String#split method in combination with Array#map:

let str = "[1 2 21 0 50 0 0 0],[2 1 3 1 50 0 0 0]";
let arr = str
  .split(',')
  .map(item => item.slice(1, -1))
  .map(item => item.split(' '));

console.log(arr);

Nevertheless, this approach may not be the most elegant and could lead to errors if there are changes in the string structure. It would be advisable to address the root issue by correcting the JSON format instead.

Answer 2

To achieve this, you can utilize the String#split method in combination with Array#map:

let str = "[1 2 21 0 50 0 0 0],[2 1 3 1 50 0 0 0]";
let arr = str
  .split(',')
  .map(item => item.slice(1, -1))
  .map(item => item.split(' '));

console.log(arr);

Nevertheless, this approach may not be the most elegant and could lead to errors if there are changes in the string structure. It would be advisable to address the root issue by correcting the JSON format instead.

Answer 3

Answer №2

When the list is enclosed in quotation marks, JSON.parse interprets it as a string because that's what it actually is.

To convert it into a valid array, you can remove the quotation marks, encapsulate the list with [] square brackets, and separate elements with , commas like this:

{
    "data": {
        "myStatus": [[1, 2, 21, 0, 50, 0, 0, 0], [2, 1, 3, 1, 50, 0, 0, 0]]
    },
    "success": true
}

If you're unable to modify the JSON string and it must have a string for data.myStatus, then an extra step is needed to manually parse it. For example:

var string = jsonObj.data.myStatus;
string = `[${string}]`;
string = string.replace(/ +/g, ',');
jsonObj.data.myStatus = JSON.parse(string);

Answer 4

When the list is enclosed in quotation marks, JSON.parse interprets it as a string because that's what it actually is.

To convert it into a valid array, you can remove the quotation marks, encapsulate the list with [] square brackets, and separate elements with , commas like this:

{
    "data": {
        "myStatus": [[1, 2, 21, 0, 50, 0, 0, 0], [2, 1, 3, 1, 50, 0, 0, 0]]
    },
    "success": true
}

If you're unable to modify the JSON string and it must have a string for data.myStatus, then an extra step is needed to manually parse it. For example:

var string = jsonObj.data.myStatus;
string = `[${string}]`;
string = string.replace(/ +/g, ',');
jsonObj.data.myStatus = JSON.parse(string);

What is the best way to convert a JSON string from a specific array into an array object?

Answer №1

Answer №2

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