This question already has answers here:
Add new attribute (element) to JSON object using JavaScript
(11 answers)
Add property to each object in the array [duplicate]
(2 answers)
Closed 6 years ago.
I have a JSON object of the following format
[{"field1":1,"field2":"A","field3":"B"},
{"field1":2,"field2":"B","field3":"C"},
{......},
{......},
]
I need to add a new attribute to each row based on some calculations.
Expected result
[{"field1":1,"field2":"A","field3":"B","field4"="generatedVal1"},
{"field1":2,"field2":"B","field3":"C","field4"="generatedVal2"},
{......},
{......},
]
How can I achieve this using javascript?
Use Array.prototype.forEach method:
[
{"field1":1,"field2":"A","field3":"B"},
{"field1":2,"field2":"B","field3":"C"}
]
.forEach(obj => {
obj.field4 = 'Something'
})
Sidenote on terminology: you don't have any JSON, you have javascript array (object). JSON is a string representation of this object, but in your question you are talking about object itself.
Related
This question already has answers here:
How can I access and process nested objects, arrays, or JSON?
(31 answers)
Closed 1 year ago.
Now I am sending length as a string as a function parameter.
function sample(operation){
var str="hello";
console.log(str.operation);
}
sample("length");
I am not allowed to change the way I am sending length(has to be a string).What can I do for this function to give me the expected output?
If you just want to access the property, use bracket notation for your property accessor:
console.log(str[operation])
This question already has answers here:
How to parse JSON data with jQuery / JavaScript?
(11 answers)
Closed 4 years ago.
On AJAX request response is following :
[ {"status":{"login":"invalid"}},
{"user":{"username":false,"pwd":false}}
]
How to read values in Jquery.
Use JSON.parse(string) to get an Object.
After that you can access values as default:
var json = JSON.parse(res.data)
console.log(json.status.login)
This question already has an answer here:
creating arrays of objects in javascript
(1 answer)
Closed 5 years ago.
I have an object defined as
myObject = {
property1 : "",
property2 : ""
}
I need to create an Array of the above object.
I have tried using
myArray = myObject[].
But it doesn't seem to work.Is there any way that we can create an array of a predefined object in javascript.
Is there any way that we can create an array of a predefined object in javascript?
No, in JavaScript, you can't type the content of your array at the declaration of your array.
What you are looking for is TypeScript.
This question already has answers here:
How can I access and process nested objects, arrays, or JSON?
(31 answers)
Closed 7 years ago.
how do you get objects for events -> performances -> name & occurs_at to this json file https://api.myjson.com/bins/w05x using javascript. Cannot use regex since json API keeps changing format. Thanks
Use the JSON parser
obj = JSON.parse(json_string);
then you access it with
obj.events[event_index].performances[performance_index].performer.name
obj.events[event_index].name
obj.events[event_index].occurs_at
JSFiddle example of listing all the event attributes name and occurs_at.
This question already has answers here:
JavaScript object: access variable property by name as string [duplicate]
(3 answers)
Closed 7 years ago.
I want to retrieve a JSON value dynamically from JSON object. Below is the code i am using to get the value from JSON object.
var jsonObj = JSON.parse(jsonData);
console.log(jsonObj);
jsonSplit = jsonToFind.split(htmlSplit+".")[1].trim();
console.log(jsonObj+"."+jsonSplit);
But I am getting [object Object].ensighten_tag.
Here ensighten_tag is the dynamic key value.
Can anyone suggest me how to get the value dynamically ?
console.log(JsonObj[jsonSplit])