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is it possible to retrieve and print the data from a json object inside json array without using any index values and specific keys

[
{
"id": "628ba44f5a6de600071d16fa",
"#baseType": "LogicalResource",
"isBundle": false,
"isMNP": false,
"businessType": [],
"category": [
{
"id": "628ba3ef5a6de600071d165f",
"name": "Starterpack2",
"description": "Starterpack2",
"code": "RC17",
"version": 2
}}]
now i need to check and print the JSON Object inside the JSON Array if category is present then it should print and in future if category is changed according to that if we pass parameter the output should print we don't hard code the code
i have tried by using key values it is coming but if the key value changes it is not printing the object
EX:-
[
{
"id": "628ba44f5a6de600071d16fa",
"#baseType": "LogicalResource",
"isBundle": false,
"isMNP": false,
"businessType": [],
"category": [
{
"id": "628ba3ef5a6de600071d165f",
"name": "Starterpack2",
"description": "Starterpack2",
"code": "RC17",
"version": 2
}}]
in the above code i have printed category object but if category changed to categories it is not printing so i want a code which can read the code and based on parameters user giving it should be print the output

Try this.
For Example:
let a = [{"id": "628ba44f5a6de600071d16fa","category": [
{
"id": "628ba3ef5a6de600071d165f",
"name": "Starterpack2",
"description": "Starterpack2",
"code": "RC17",
"version": 2
}]}]
function print (values){return (a[0][`${values}`])}
//now just pass any name like "category" or in future "categories"
print("category") //this will retrun the array.
Now modify with your requirements.

It seems you want to get the value of the key(that can be parameterized).
const jsonArray = [
{
"id": "628ba44f5a6de600071d16fa",
"#baseType": "LogicalResource",
"isBundle": false,
"isMNP": false,
"businessType": [],
"category": [
{
"id": "628ba3ef5a6de600071d165f",
"name": "Starterpack2",
"description": "Starterpack2",
"code": "RC17",
"version": 2
}
]
}
];
const parameter = "category";
const result = jsonArray.find(({ [parameter]: value }) => value);
if (result) {
console.log(result);
} else {
console.log(`No object found with ${parameter}`);
}
If this is not what you are looking for, then please add your code snippet for better understanding.

Search inside an object from the req.query

I have a nested object displayed in my view and i want to search in it from the query like this :
http://localhost:3000/test?$folder=folder
My object is like this :
const test = {
"item": [
{
"name": "folder",
"item": [{
"name": "subFolder",
"item": [
{
"name": "subFolderTest1",
"item": [{
"path": "/",
"items": [{
"method": "GET",
}]
}]
},
{
"name": "subFolderTest2",
"item": [{
"path": "/",
"items": [{
"method": "GET",
}]
}]
}
]
}]
}
]
}
If i have http://localhost:3000/test?$folder=folder then i would have :
{
{
"name": "subFolder",
"item": [{},{}]
}
}
And if i have http://localhost:3000/test?$folder=folder/subFolder then i will have :
{
{
"name": "subFolderTest1",
"item": [{}]
},
{
"name": "subFolderTest2",
"item": [{}]
}
}
I know how to get what's inside my query and what the user's input but i don't how to search and display from something which is already displayed.

If you already have your query string you could split it by the "/" character. Use the first name to find your first item, the second name to find the second, and so on.
var folder = "folder/subFolder";
var path = folder.split("/");
var currentItem = test["item"];
// Get each name you are looking for
path.forEach(function(name) {
// get each entry of the current item
currentItem.forEach(function(entry) {
// if the name of the entry is the same as the
// name you are looking for then this is the
// next item you are looking for
if (entry.name == name) {
currentItem = entry["item"];
}
});
});
// now currentItem should be the entry specified by your path
You will still have to add code to handle situations like not having the name you are looking for in your current item, or having multiple entries with the correct name, and so on. I just kept it simple for the sake of clarity.

How to get specific array from JSON object with Javascript?

I am working with facebook JS SDK which returns user's information in JSON format. I know how to get the response like response.email which returns email address. But how to get an element from a nested array object? Example: user's education history may contain multiple arrays and each array will have an element such as "name" of "school". I want to get the element from the last array of an object.
This is a sample JSON I got:-
"education": [
{
"school": {
"id": "162285817180560",
"name": "Jhenaidah** School"
},
"type": "H**hool",
"year": {
"id": "14404**5610606",
"name": "2011"
},
"id": "855**14449421"
},
{
"concentration": [
{
"id": "15158**968",
"name": "Sof**ering"
},
{
"id": "20179020**7859",
"name": "Dig**ty"
}
],
"school": {
"id": "10827**27428",
"name": "Univer**g"
},
"type": "College",
"id": "9885**826013"
},
{
"concentration": [
{
"id": "108196**810",
"name": "Science"
}
],
"school": {
"id": "2772**996993",
"name": "some COLLEGE NAME I WANT TO GET"
},
"type": "College",
"year": {
"id": "1388*****",
"name": "2013"
},
"id": "8811215**16"
}]
Let's say I want to get "name": "some COLLEGE NAME I WANT TO GET" from the last array. How to do that with Javascript? I hope I could explain my problem. Thank you

Here is a JsFiddle Example
var json = '{}' // your data;
// convert to javascript object:
var obj = JSON.parse(json);
// get last item in array:
var last = obj.education[obj.education.length - 1].school.name;
// result: some COLLEGE NAME I WANT TO GET

If your json above was saved to an object called json, you could access the school name "some COLLEGE NAME I WANT TO GET" with the following:
json.education[2].school.name

If you know where that element is, then you can just select it as already mentioned by calling
var obj = FACEBOOK_ACTION;
obj.education[2].school.name
If you want to select specifically the last element, then use something like this:
obj.education[ obj.education.length - 1 ].scool.name

Try this,
if (myData.hasOwnProperty('merchant_id')) {
// do something here
}
where JSON myData is:
{
amount: "10.00",
email: "someone#example.com",
merchant_id: "123",
mobile_no: "9874563210",
order_id: "123456",
passkey: "1234"
}
This is a simple example for your understanding. In your scenario of nested objects, loop over your JSON data and use hasOwnProperty to check if key name exists.

Iterate through nested Javascript Objects from API response

I've tried 100 different things, and spend days looking through Google and Stackoverflow, but I can't find a solution to this problem. Everything I call after the body of this API response returns undefined!
The response from Facebook SDK looks like this:
[
{
"body": "[
"data": [
{
"name": "Larry Syid Wright",
"administrator": false,
"id": "xxx"
}, {
"name": "Melissa Long Jackson",
"administrator": false,
"id": "xxx"
}, {
"name": "Charlotte Masson",
"administrator": false,
"id": "xxx"
}
],
"paging": {
"next": "url"
}
]"
},{
"body": "{
"data": [
{
"id": "xxx_xxx",
"message": "In honor of Halloween, how many of you have your own ghost stories? Who believes in ghosts and who doesn't?",
"type": "status",
"created_time": "2014-10-31T20:02:01+0000",
"updated_time": "2014-11-01T02:52:51+0000",
"likes": {
"data": [
{
"id": "xxx",
"name": "Joe HerBatman Owenby Jr."
}
],
}
"paging": {
"cursors":
{
"after": "xxx",
"before": "xxx"
}
}
}
},{
"id": "xxx_xxx",
"from": {
"id": "xxx",
"name": "Jessica Starling"
},
"message": "Watching the "Campaign" and I can't help but notice what a fantastic job they did (Will ferrell and all) with that North Carolina accent! Ya'll know we sound different than other southern states ;)",
"type": "status",
"created_time": "2014-11-01T02:36:21+0000",
"updated_time": "2014-11-01T02:36:21+0000",
"likes": {
"data": [
{
"id": "xxx",
"name": "Scott Williams"n
}
]
}
}
],
"paging": {
"previous": "xxx",
"next": "xxx"
}
}"
}
]
This response is from a batch call. If I call them separately, I can easily iterate through the responses, and get everything from them. When I call them in the batch though, I can't get past "body", and I need to use a batch call.
console.log(response[0].body); will return the object inside the body of the first part of the response, but console.log(response[0].body.data); returns undefined. I just don't get it. This should be simple but it's like there's a lock on the door and I don't have the right key.
I normally have no issue iterating through objects, so I don't need a generalized answer. I need help seeing whatever it is here that I don't see. Why does the console show undefined when I call anything after the body, and what do I need to be doing to get any of these values?

That JSON contains nested JSON. body seems to be a string. Use
var body = JSON.parse(response[0].body);

The values from the body are just strings.which are embedded as json.So firstly you would need to parse them using JSON.parse.
The code would be like
var body = JSON.parse(response[0].body);

Getting first item in jsonp object

I'm working with a jsonp object, it lists items like this:
{
"played_tracks": [
{
"artist": {
"id": 5524,
"name": "BAAUER",
}
},
"title": "Harlem Shake",
},
{
"artist": {
"id": 114,
"name": "BIRDY",
}
},
"title": "Wings ",
},
{
"artist": {
"id": 1257,
"name": "MILEY CYRUS",
}
},
"title": "Wrecking Ball",
},
{
etc........
Now currently I'm using this code to loop through all of them:
for(i in json.played_tracks)
{
oTrack = json.played_tracks[i];
etc.........
}
How do I adjust my code to only display the last played song? The last song is the first item in the jSONP object.

Instead of looping over json.playedTracks, just fetch the first item of the array like so:
oTrack = json.playedTracks[0];
As you say, the first item is the "last played track," so that should do what you want. If you need the other end of the list though, you can grab that element just as easily:
oTrack = json.playedTracks[json.playedTracks.length - 1];