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Manipulating nested objects

I have the following data structure:
{
"nodes": [
{
"frontmatter": {
"excerpt": null,
"featured": true,
"title": "A Post with Content"
},
"fields": {
"slug": "posts/a-post-of-type-page",
}
},
{
"frontmatter": {
"excerpt": null,
"featured": null,
"title": "A post of type post"
},
"fields": {
"slug": "posts/a-post-of-type-post",
}
},
{
"frontmatter": {
"excerpt": null,
"featured": null,
"title": "Another Post (or type post)"
},
"fields": {
"slug": "posts/another-post-or-type-post",
}
},
{
"frontmatter": {
"excerpt": "This is the excerpt of a post",
"featured": null,
"title": "With Content"
},
"fields": {
"slug": "posts/with-content",
}
},
]
}
I know that I can use myObject.nodes.map(x => x.frontmatter) to bring the frontmatter up a level and removing the nesting. But, I now need to change each node into the following structure within the resulting array:
{
"nodes": [
{
"excerpt": null,
"featured": true,
"title": "A Post with Content"
"slug": "posts/a-post-of-type-page",
},
...
]
}
So, I need to remove the nesting for both the frontmatter and fields.
Thanks

const d = {"nodes":[{"frontmatter":{"excerpt":null,"featured":true,"title":"A Post with Content"},"fields":{"slug":"posts/a-post-of-type-page"}},{"frontmatter":{"excerpt":null,"featured":null,"title":"A post of type post"},"fields":{"slug":"posts/a-post-of-type-post"}},{"frontmatter":{"excerpt":null,"featured":null,"title":"Another Post (or type post)"},"fields":{"slug":"posts/another-post-or-type-post"}},{"frontmatter":{"excerpt":"This is the excerpt of a post","featured":null,"title":"With Content"},"fields":{"slug":"posts/with-content"}}]};
d.nodes = d.nodes.map(({frontmatter, fields})=>({...frontmatter, ...fields}));
console.log(d);

Here is another solution:
const data = {"nodes":[{"frontmatter":{"excerpt":null,"featured":true,"title":"A Post with Content"},"fields":{"slug":"posts/a-post-of-type-page"}},{"frontmatter":{"excerpt":null,"featured":null,"title":"A post of type post"},"fields":{"slug":"posts/a-post-of-type-post"}},{"frontmatter":{"excerpt":null,"featured":null,"title":"Another Post (or type post)"},"fields":{"slug":"posts/another-post-or-type-post"}},{"frontmatter":{"excerpt":"This is the excerpt of a post","featured":null,"title":"With Content"},"fields":{"slug":"posts/with-content"}}]};
let newArr = [];
data.nodes.forEach((n)=>newArr.push(Object.assign(n.fields, n.frontmatter)));
console.log({"nodes": newArr});

Merge a Product Config JSON with Generic Config JSON- Issue While Merging Arrays inside it

I have 2 different Json files
1: a Deaflut JSON file
2: A Product Based JSON file
I need to merge them together in such a way that if a feature in default is not in a product that needs to be added to product config from default one.
for this merge, I used "lodash.mergewith" https://www.npmjs.com/package/lodash.mergewith.
so this is now taking care of the merge, But the file contains multiple nested JSON arrays inside it.
to handle that there is an option to use a customizer method that can handle array merge as mentioned in the usage of lodash.mergewith. I need a customizer that can find the Label from Deaflut and compare it with the Product if the Product has the same Label value then replace the URL with the Product URL. else if the Label is not in Product config, then use it from default as it is.
Example
Default config.json:-links is an array of this json with path : object►login►options►sections►2►links
"links": [{
"url": "www.google.com",
"label": "Lable1"
},
{
"url": "www.google.com",
"label": "Label2"
},
{
"url": "www.google.com",
"label": "Label3"
},
{
"url": "www.google.com",
"label": "Label4"
}
]
Productconfig.json:- links is an array inside this of the path: object►login►options►sections►2►links
"links": [{
"url": "www.product1.com",
"label": "label1"
},
{
"url": "www.product2.com",
"label": "Label2"
}
]
** after merge mergedconfig.json "Links" need to be like this.**
"links": [{
"url": "www.product1.com",
"label": "Label1"
},
{
"url": "www.product2.com",
"label": "Label2"
},
{
"url": "www.google.com",
"label": "Label3"
},
{
"url": "www.google.com",
"label": "Label4"
}
]
The main concern is this Array is coming inside a JSON file inside some JSON objects
like eg if the Array is inside links[] it will be in a path like : object►login►options►sections►2►links[]. and this Links Array similarly present inside in some other paths eg: object►register►options►sections►2►links[]
So I need to figure out all the Array like this and for each of the Arrays, I need to perform this action.

Just use Array.map and Array.find:
let links= [
{
"url": "www.google.com",
"label": "Label1"
},
{
"url": "www.google.com",
"label": "Label2"
},
{
"url": "www.google.com",
"label": "Label3"
},
{
"url": "www.google.com",
"label": "Label4"
}
];
let plinks= [{
"url": "www.product1.com",
"label": "label1"
},
{
"url": "www.product2.com",
"label": "Label2"
}
];
let results = links.map(lnk=>{
plnk = plinks.find(pl=>pl.label.toLowerCase()===lnk.label.toLowerCase());
return plnk || lnk
});
console.log(results);
for clean access to nested JSON keys you can use ES like this:
let a = {
b: {
c: [1,2,3]
}
};
let {c} = a?.b;
console.log(c);

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.

how to export complex json to excel with alasql

I have a json like this (there might be some syntax errors, I did extract and rewrite some private data)
"todo-items": [{
"id": 3511710,
"company-name": "company1",
"author" : "Jon Doe",
"tags": [{
"id": 10101,
"name": "2.Marketing Sales",
"color": "#f78234"
}],
"creation-date": 20160101
}, {
"id": 3511474,
"company-name": "company1",
"author" : "Jon Don",
"tags": [{
"id": 10101,
"name": "2.Marketing Sales",
"color": "#f78234"
}, {
"id": 10103,
"name": "4.Automotive",
"color": "#9b7cdb"
}],
"creation-date": 20160101
}, {
"id": 3511478,
"company-name": "company1",
"author" : "Peter Jon Doe",
"tags": [{
"id": 10101,
"name": "2.Marketing Sales",
"color": "#f78234"
}, {
"id": 9706,
"name": "3.sales",
"color": "#37ced0"
}, {
"id": 9562,
"name": "3.IT",
"color": "#37ced0"
}],
"creation-date": 20160101
}]
and I use alasql with xlsx.core libraries to export this to excel file.
For first I remove STATUS from original json (provided by teamwork API) and then I change JSON to javascript array
$.ajax({
type: "GET",
url: requrl,
headers: {"Authorization": "BASIC " + window.btoa(key + ":xxx")},
success: function(data) {
delete data.STATUS;
//alert(data);
//console.log(data);
var arr = $.map(data, function(el) { return el });
//console.log(arr);
alasql("SELECT * INTO XLSX('test.xlsx',{headers:true}) FROM ? ",[arr]);
},
error: function(response) {
alert(response);
}
});
this works nice and I can my json extract as excel file
but I have issues with tags objects in this json..when I change it to array and then save it in excel, all columns are ok except tags, where I see just [object][object]
Could you help me how to get these tags also into correct array? The best would be one tag = one column in excel
edit:
this is desired output - max # of tags in JSON will define number of columns tags (doesnt matter if it is tags tags tags or tags tags2 tags3)

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);