JavaScript | Convert Array to JSON Object

JavaScript | Convert Array to JSON Object

Here is a need to convert an array into a JSON_Object. To do so we ... This method converts the javascript Object(array in this case) into JSON_string. Syntax:

What is JSON?

JSON means JavaScript Object Notation. JSON is an extremely lightweight data-interchange format for data exchange between server-side and client side which is quick and easy to parse and generate.

1. Convert Array to JSON Object JavaScript

You can use JSON.stringify to convert an array into a JSON formatted string in JavaScript.

Suppose there is an array such as “[6, 7, 8, 9]”. If you want to convert this array to JSON Object in javascript. Let’s see the example below

Ex:

    var arr = [5, 6, 7, 8]; 
    var arrayToString = JSON.stringify(Object.assign({}, arr));  // convert array to string
    var stringToJsonObject = JSON.parse(arrayToString);  // convert string to json object
    
    console.log(stringToJsonObject);

Output :

  {
       "0": 5,
       "1": 6,
       "2": 7,
       "2": 8
   }

Here,

  • 1.JSON.stringify() and Object.assign() method convert array to JSON string.
  • 2.JSON.parse() method convert string to JSON object in javascript.

2. Converting an Object to an Array

When converting an object to an array, we’ll use the .entries() method from the Object class. This will convert our object to an array of arrays. Each nested array is a two-value list where the first item is the key and the second item is the value.

Ex:

const obj = {"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0};
console.log(Object.entries(obj));

3. Convert two dimensional ( 2d ) arrays to JSON Object JavaScript

Suppose there is an array such as

var arr = [
    ["Status", "Name", "Marks", "Position"], 
    ["active", "Akash", 10.0, "Web Developer"],
    ["active", "Vikash", 10.0, "Front-end-dev"],
    ["deactive", "Manish", 10.0, "designer"],
    ["active", "Kapil", 10.0, "JavaScript developer"],
    ["active", "Manoj", 10.0, "Angular developer"],
];

If you want to convert this array to JSON Object in javascript. Let’s see the example below :

Ex:

//array.
var arr = [
    ["Status", "Name", "Marks", "Position"], 
    ["active", "Akash", 10.0, "Web Developer"],
    ["active", "Vikash", 10.0, "Front-end-dev"],
    ["deactive", "Manish", 10.0, "designer"],
    ["active", "Kapil", 10.0, "JavaScript developer"],
    ["active", "Manoj", 10.0, "Angular developer"],
];
 
//javascript create JSON object from two dimensional Array
function arrayToJSONObject (arr){
    //header
    var keys = arr[0];
 
    //vacate keys from main array
    var newArr = arr.slice(1, arr.length);
 
    var formatted = [],
    data = newArr,
    cols = keys,
    l = cols.length;
    for (var i=0; i<data.length; i++) {
            var d = data[i],
                    o = {};
            for (var j=0; j<l; j++)
                    o[cols[j]] = d[j];
            formatted.push(o);
    }
    return formatted;
}

Javascript | How To Covert Javascript Array To JSON

Javascript | How To Covert Javascript Array To JSON

In this example, we will see How To Covert Javascript Array To JSON. We can convert Javascript array to json using JSON.stringify() method. At some point in your time, whatever developer you are, you need to deal with JSON data. JSON stands for Javascript Object Notation. Exchange data between client and server is straightforward using JSON.

In this example, we will see How To Covert Javascript Array To JSON. We can convert Javascript array to json using JSON.stringify() method. At some point in your time, whatever developer you are, you need to deal with JSON data. JSON stands for Javascript Object Notation. Exchange data between client and server is straightforward using JSON.

How To Covert Javascript Array To JSON

Javascript JSON.stringify() method converts Javascript array to json, and then we can send the string to the server.

Javascript JSON.stringify() is the inbuilt function in which it allows us to take the JavaScript Object or Array and create a JSON string out of it.

JSON.stringify() converts the value to JSON notation representing it:

If a value has the toJSON() method, it’s responsible for defining what data will be serialized.

See the following example.


// app.js

let data = [
  'krunal',
  'ankit',
  'rushabh'
]
jsonData = JSON.stringify(data)
console.log(jsonData)
console.log(typeof jsonData === 'string')

Output


➜  es git:(master) ✗ node app
["krunal","ankit","rushabh"]
true
➜  es git:(master) ✗

In the above code, we have defined a Javascript array with three values and then convert it into a JSON string using JSON.stringify() method.

Then we have printed JSON data in the console and check if the typeof jsondata is a string or not. Of course, it will return true because it is now JSON string ready to send the server via AJAX request. You can use the Axios library to send a network request.

JavaScript Object to JSON

We can use the same JSON.stringify() function to convert the Javascript object to json.

// app.js

let obj = {
  name: 'Krunal',
  rollno: 10,
  site: 'AppDividend'
}
jsonData = JSON.stringify(obj)
console.log(jsonData)
console.log(typeof jsonData === 'string')

Output

➜  es git:(master) ✗ node app
{"name":"Krunal","rollno":10,"site":"AppDividend"}
true
➜  es git:(master) ✗

We have defined an object and then pass to JSON.stringify() method, and it converts from Javascript object to json string.

Often, you need to convert the JavaScript values like string, array, or object into JSON before AJAX POST request.

The JSON object is now part of most modern web browsers (IE 8 & above).

Conclusion

We can convert Javascript datatypes like Number, Array, Object to JSON with just one function, and it is beneficial when exchanging data between client and server.

How to convert Array to JSON Object JavaScript

How to convert Array to JSON Object JavaScript

This JavaScript tutorial explains how to convert Array to JSON Object JavaScript. You can use JSON.stringify to convert an array or values into a JSON formatted string. What is JSON? JSON means JavaScript Object Notation. JSON is an extremely lightweight data-interchange format for data exchange between server-side and client side which is quick and easy to parse and generate.

What is JSON?

JSON means JavaScript Object Notation. JSON is an extremely lightweight data-interchange format for data exchange between server-side and client side which is quick and easy to parse and generate.

1. Convert Array to JSON Object JavaScript

You can use JSON.stringify to convert an array into a JSON formatted string in JavaScript.

Suppose there is an array such as “[1, 2, 3, 4]”. If you want to convert this array to JSON Object in javascript. Let’s see the example below

Ex:-

var array = [1, 2, 3, 4]; 
var arrayToString = JSON.stringify(Object.assign({}, array));  // convert array to string
var stringToJsonObject = JSON.parse(arrayToString);  // convert string to json object
 
console.log(stringToJsonObject);

Here,

  • 1.JSON.stringify() and Object.assign() method convert array to JSON string.
  • 2.JSON.parse() method convert string to JSON object in javascript.

2. Converting an Object to an Array

When converting an object to an array, we’ll use the .entries() method from the Object class. This will convert our object to an array of arrays. Each nested array is a two-value list where the first item is the key and the second item is the value.

Ex:-

var object = {
   "first_name": "Test",
   "last_name": "Test",
   "email": "[email protected]"
}
var arr = Object.entries(object);
 
console.log(arr);

3. Convert two dimensional ( 2d ) arrays to JSON Object JavaScript

Suppose there is an array such as

var arr = [
    ["Status", "Name", "Marks", "Position"], 
    ["active", "Akash", 10.0, "Web Developer"],
    ["active", "Vikash", 10.0, "Front-end-dev"],
    ["deactive", "Manish", 10.0, "designer"],
    ["active", "Kapil", 10.0, "JavaScript developer"],
    ["active", "Manoj", 10.0, "Angular developer"],
];

If you want to convert this array to JSON Object in javascript. Let’s see the example below :

Ex:-

//array.
var arr = [
    ["Status", "Name", "Marks", "Position"], 
    ["active", "Akash", 10.0, "Web Developer"],
    ["active", "Vikash", 10.0, "Front-end-dev"],
    ["deactive", "Manish", 10.0, "designer"],
    ["active", "Kapil", 10.0, "JavaScript developer"],
    ["active", "Manoj", 10.0, "Angular developer"],
];
 
//javascript create JSON object from two dimensional Array
function arrayToJSONObject (arr){
    //header
    var keys = arr[0];
 
    //vacate keys from main array
    var newArr = arr.slice(1, arr.length);
 
    var formatted = [],
    data = newArr,
    cols = keys,
    l = cols.length;
    for (var i=0; i<data.length; i++) {
            var d = data[i],
                    o = {};
            for (var j=0; j<l; j++)
                    o[cols[j]] = d[j];
            formatted.push(o);
    }
    return formatted;
}

JSON Tutorial For Beginners | What is JSON | Learning JSON with JavaScript

JSON Tutorial For Beginners | What is JSON | Learning JSON with JavaScript

JSON Tutorial For Beginners | What is JSON | Learning JSON with JavaScript

Explore JSON and how JavaScript Objects can be used to access data within JSON data format and output to your web page

Guide to learning how to use JavaScript Objects and JSON data. JSON is the most popular format for data exchange between applications. If you are interested in connected to a web API chances are its JSON formatted. Learn to use AJAX to connect and bring JSON data into your JavaScript!

This course shows you how to work with JSON formatted data, output content, loop JSON data, Parse JSON and a whole lot more.

JSON (JavaScript Object Notation) is a syntax for data. JSON is easier to use than XML and human readable. Most modern web APIs output data in JSON formats. It's a lightweight data interchange format that is quickly becoming the default format for data exchange on internet today! JSON is lightweight, language independent and easy to read and write. JSON is better than XML and more popular!

Within the lessons of this course we will explore

  • JavaScript data types used to hold variables and how they work
  • JSON and how to write JSON data
  • How to add values into a JSON object
  • Accessing JSON data and bringing it into JavaScript
  • JavaScript JSON parse and stringify methods
  • Adding JSON to local storage
  • Retrieving back data within JSON formats, updating and working with JSON
  • Connecting to a web API using fetch
  • Retrieving JSON data from a web API and outputting the results into your web page
  • Iterating threw multiple results from an API
  • Google Spreadsheet data as JSON and how to practice retrieving data
  • All of the source code and resources are in included
  • Explore different methods of working with the JSON data stringify and parsing
  • How JavaScript objects can use Arrays to hold multiple items
  • How JavaScript arrays work and store data

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