How to Push Json into Array

How to push json data from a json file into an array with a new set and update the file

You are inserting an array into the product array.

See the correct code below -

const products = [];
    fs.readFile(pathToTheFile, (err, data) => { // get the data from the file
        if(data != ''){
            products = JSON.parse(data);
        }
        products.push(this);
        fs.writeFile(pathToTheFile, JSON.stringify(products), (err) => {
            console.log(err);
        });            
    });

JavaScript push to array

It's not an array.

var json = {"cool":"34.33","alsocool":"45454"};
json.coolness = 34.33;

var json = {"cool":"34.33","alsocool":"45454"};
json['coolness'] = 34.33;

you could do it as an array, but it would be a different syntax (and this is almost certainly not what you want)

var json = [{"cool":"34.33"},{"alsocool":"45454"}];
json.push({"coolness":"34.33"});

Note that this variable name is highly misleading, as there is no JSON here. I would name it something else.

JSON array pushing

I tried and found the solution to it, since the att and values will be object after i push it

var temp = new Object();
    temp["id"] = "po-0167";
    temp["date"] = new Date(1980, 2, 24);
    temp["quantity"] = 1;
    temp["amount"] = 4;
    temp["title"] = "A Book About Nothing";

bookorders.push(temp);

this will make it display in the datatable, the generic part will just be iterated through using the temp[att] = attributes[att];

How to push multiple json (response ) in single array?

Hi @Shreyash Kolhe you can try something like this.

const [data, setData] = useState([]);

with useState you will have the data and a setter function to set data. In your Axios call, you can set the data as below.

setData(preData => [...preData, res.data]);

The preData will hold the previous data which you current state data.
This will append the new data with the old data you have in your state. Please share the code next time it will help the community to help you out more effectively.

Cannot push JSON object into Array

var checkedIntervews = []var interviewModel = {};checkedIntervews.push(JSON.stringify(interviewModel));console.log(checkedIntervews);
(function arrayPush() {this.checkedIntervews = [];var interviewModel = {};this.checkedIntervews.push(JSON.stringify(interviewModel));console.log(this.checkedIntervews);})();

How can I push data to an array in a JSON file and save it?

When you import the contents of testlist.json into the variable testlist using require(), you are loading the file's contents into memory. You will need to write back to the file after you have made changes to the testlist variable if you want your modifications to persist. Otherwise, the changes that you make will be lost when the program's process exits.

You can use the writeFileSync() method from the fs module, as well as JSON.stringify(), to write testlist back into the testlist.json file:

const fs = require("fs");

let testlist = require("../testlist.json");

// Your code where you modify testlist goes here

// Convert testlist to a JSON string
const testlistJson = JSON.stringify(testlist);
// Write testlist back to the file
fs.writeFileSync("../testlist.json", testlistJson, "utf8");

Edit: You should also use the readFileSync() method (also from the fs module), and JSON.parse() to perform the initial reading of the JSON file, rather than require().

// This line
let testlist = require("../testlist.json");

// Gets replaced with this line
let testlist = JSON.parse(fs.readFileSync("../testlist.json", "utf8"));

You have to use JSON.parse as well as fs.readFileSync because when you are reading the file, it is read as a string, rather than a JSON object.