Adding elements to object

Question

I need to populate a json file, now I have something like this:

{\"element\":{\"id\":10,\"quantity\":1}}

And I need to add another \"elemen

Answer 1

function addValueInObject(object, key, value) {
    var res = {};
    var textObject = JSON.stringify(object);
    if (textObject === '{}') {
        res = JSON.parse('{"' + key + '":"' + value + '"}');
    } else {
        res = JSON.parse('{' + textObject.substring(1, textObject.length - 1) + ',"' + key + '":"' + value + '"}');
    }
    return res;
}

this code is worked.

Answer 2

With that row

var element = {};

you define element to be a plain object. The native JavaScript object has no push() method. To add new items to a plain object use this syntax:

element[ yourKey ] = yourValue;

On the other hand you could define element as an array using

var element = [];

Then you can add elements using push().

Answer 3

To append to an object use Object.assign

var ElementList ={}

function addElement (ElementList, element) {
    let newList = Object.assign(ElementList, element)
    return newList
}
console.log(ElementList)

Output:

{"element":{"id":10,"quantity":1},"element":{"id":11,"quantity":2}}

Answer 4

Try this:

var data = [{field:"Data",type:"date"},  {field:"Numero",type:"number"}];

var columns = {};

var index = 0;

$.each(data, function() {

    columns[index] = {
        field : this.field,
        type : this.type
    };

    index++;
});

console.log(columns);

Answer 5

Your element is not an array, however your cart needs to be an array in order to support many element objects. Code example:

var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push(element);

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:

>> JSON.stringify([{a: 1}, {a: 2}]) 
      "[{"a":1},{"a":2}]" 

Answer 6

push is an method of arrays , so for object you can get the index of last element ,and you can probably do the same job as push for object as below

var lastIndex = Object.keys(element)[Object.keys(element).length-1];

then add object to the new index of element

element[parseInt(lastIndex) +1] = { id: id, quantity: quantity };