JavaScript Convert Array to JSON Object

To convert array to JSON object string JavaScript; Through this tutorial, i am going to show how to convert array to JSON object string in JavaScript.

Convert Array to JSON Object JavaScript

See the following for how to convert array to JSON object string and object to array in JavaScript; as shown below:

  • Convert Array to JSON Object JavaScript
  • JavaScript Convert Object to Array
  • Convert two dimensional ( 2d ) arrays to JSON Object JavaScript

JavaScript Convert Array to JSON Object String

Using JavaScript JSON.stringify() to convert an array into a JSON formatted string in JavaScript; as shown below:

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, i will explain to you about above used javaScript functions:

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

JavaScript Convert Object to Array

Here, i will take an example to convert object to array using javaScript.entries() method from the Object class; as shown below:

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

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

Let, you have array two dimensional; as shown below:

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"],
];

Want to convert this two deminsional array to JSON Object in javaScript. As shown below:

//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;
}

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