Javascript add item in Object

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add element in object in js

this is my code

    var arr = [{
      id: '1',
      total: "Total:",
      titlea: 'a',
      titleb: 'b',
   }];

    let c=  {titlec: 'c'}
    arr.push(c);
    console.log(arr)

So the console.log shows that

0: {id: "1", totalPdf: "Total:", titlea: "a", titleb: "b"}
1: {titlec: "c"}

But I want it as:

0: {id: "1", totalPdf: "Total:", titlea: "a", titleb: "b", titlec: "c"}

How can I do that? Thanks

Iterate over your data set using .forEach() or .map() and use Object.assign() to add properties of the c object to objects in array.

let arr = [{
  id: '1',
  total: "Total:",
  titlea: 'a',
  titleb: 'b',
}];

let c =  {titlec: 'c'}

arr.forEach(o => Object.assign(o, c));

console.log(arr);

Adding elements to object, Adding New Properties. You can add new properties to an existing object by simply giving it a value. Assume that the person object already exists - you can then  If you want cart to be an array of objects in the form { element: { id: 10, quantity: 1} } then perform: var element = {}, cart = []; element.id = id; element.quantity = quantity; cart.push( {element: element}); JSON.stringify () was mentioned as a concern in the comment:

arr.push(c); will push a new element to the object.Instead use array map & Object.assign.Array map will return a new array and with updated object value

var arr = [{
  id: '1',
  total: "Total:",
  titlea: 'a',
  titleb: 'b',
}];

let c = {
  titlec: 'c'
}

let m = arr.map(function(item) {
  return Object.assign(item, c)

})
console.log(m)

JavaScript Object Properties, <script>. // JavaScript program to add array into. // an object using push() function. // Creating a JS object to add array into it. var Obj = {. arrayOne: [],. arrayTwo: []. };. JavaScript arrays are a super-handy means of storing multiple values in a single variable. In other words, an array is a unique variable that can hold more than a value at the same time. In other words, an array is a unique variable that can hold more than a value at the same time.

push() will add a new element to the array,you should not use it

    var arr = [{
      id: '1',
      total: "Total:",
      titlea: 'a',
      titleb: 'b',
   }];

    let c=  {titlec: 'c'}
    for(var i in c){
       arr[0][i]=c[i];
    }
    console.log(arr)

How to push an array into the object in JavaScript ?, The add() method appends a new element with a specified value to the end of a Set object. Thanks mate . I needed to add items to JSON object in a for loop. So this works too thanks . events[i] = checks[i].value; // assuming [i] is the iterator console.log(events.json); // prints

let key = Object.keys(c)[0];
let value = c.titlec;
arr[0][key] = value;

Set.prototype.add(), assign() method only copies enumerable and own properties from a source object to a target object. It uses [[Get]] on the source and [[Set]] on the  In contrast, objects are used to store keyed collections of various data and more complex entities. In JavaScript, objects penetrate almost every aspect of the language. So we must understand them first before going in-depth anywhere else. An object can be created with figure brackets {…} with an optional list of properties.

try this

var arr = [{
          id: '1',
          total: "Total:",
          titlea: 'a',
          titleb: 'b',
       }];

    arr[0]["titlec"] = "c";
    console.log(arr)

Object.assign(), hi, Does anyone know the function for adding more items to an already declared JSON object? Assuming you have something like: var event=  JavaScript is designed on a simple object-based paradigm. An object is a collection of properties, and a property is an association between a name (or key) and a value. A property's value can be a function, in which case the property is known as a method.

Adding items to a JSON object - JavaScript, We can add, remove and read files from it any time. Property values are accessible using the dot notation: // get property values of the object:  Tip: To add items at the beginning of an array, use the unshift() method. Browser Support The numbers in the table specify the first browser version that fully supports the method.

Objects, How to add properties to a JavaScript object. How to change the value of an object property. Dot syntax vs bracket notation. When to use square brackets. There are 3 popular methods which can be used to insert or add an object to an array. push() splice() unshift() Method 1: push() method of Array. The push() method is used to add one or multiple elements to the end of an array. It returns the new length of the array formed. An object can be inserted by passing the object as a parameter to this method.

How to Add, Modify, or Access JavaScript Object Literal Properties, That place is called the index. Array indexes start from 0 , so if you want to add the item first, you'll use index 0 , in  Properties are the most important part of any JavaScript object. Properties are the values associated with a JavaScript object. A JavaScript object is a collection of unordered properties. Properties can usually be changed, added, and deleted, but some are read only. The expression must evaluate to a property name.

Comments
  • Look up how to assign properties to objects.
  • arr[0].titlec="c" or its equal arr[0]["titlec"]="c"
  • Do you want 0: {id: "1", totalPdf: "Total:", titlea: "a", titleb: "b", titlec: "c"} or {id: "1", totalPdf: "Total:", titlea: "a", titleb: "b", titlec: "c"}?
  • Yes , i worked Perfectly, Thank you
  • Why the loop? .
  • @mplungjan My answer is suppose object c has many properties
  • This seems to be hard coding
  • this is not a generic solution.
  • I already tried this, but i don't think this is a good way, but thank you