Parsing nested array objects in json using Java script/jQuery [closed] - javascript

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I have a JSON file like this:
{[
{"name":"avc"},
{"name":"Anna"},
{"name":"Peter"},
{"Folder":[
{"name":"John"},
{"name":"Anna"},
{"Folder":[
{"name":"gg"},
{"name":"hh"}
]
}
]
}
]
}
It can be nested to any number of levels.
I want to traverse this file for any number of levels.
How can I achieve this using Javascript/JQuery
Thanks

You could iterate with Array#forEach and if a Folder is an array, then iterate that, too.
var a = [{ "name": "avc" }, { "name": "Anna" }, { "name": "Peter" }, { "Folder": [{ "name": "John" }, { "name": "Anna" }, { "Folder": [{ "name": "gg" }, { "name": "hh" }] }] }];
a.forEach(function iter(a) {
if (Array.isArray(a.Folder)) {
a.Folder.forEach(iter);
return;
}
console.log(a.name);
});

I read your question like this:
How can I iterate through an array of object, where an object may have
children of it's own. And every child may have children and so on...
One way is to write a recursive function, which is a function that calls itself. Here's a recursive function which will log every post into console.
Note that I've changed your model into a proper object. Also, I've added name to folder, but that can be removed if not necessary.
var a = [
{name:"avc"},
{name:"Anna"},
{name:"Peter"},
{name:"Folder name1",
folder:[
{name:"John"},
{name:"Anna"},
{name: "Folder name2",
folder:[
{name:"James"},
{name:"Clark"},
{name: "Folder name3",
folder:[
{name:"Cecilia"},
{name:"Clara"}
]},
{name:"Stephen"}
]
}
]
}
];
function read(obj){
for(var i = 0; i < obj.length; i++)
{
console.log(obj[i].name); // Or do what you need here...
if(obj[i].folder)
{
// Recursive call
read(obj[i].folder);
}
}
}
read(a);

Related

How to make object from two array in javascript [closed]

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Hello i have JSON response with structure like below, you can see "postID" and "judul" is inside one object with the parent is numeric array
[
{
"postID": [
1,
2,
3
],
"judul": [
"Tes",
"a",
"TesFront"
]
},
{
"postID": [
4,
5
],
"judul": [
"Testing",
""
]
},
]
What i want to do is simply just to make "postID" and "judul" into one new object with key named "newKey" with the value inside is an object with "postID" key and "judul" key you can see the different from previouse is now "postID" and "judul" is inside "newKey" object, like this:
[
{
"newKey": {
"postID": [
1,
2,
3
],
"judul": [
"Tes",
"a",
"TesFront"
]
},
},
{
"newKey":{
"postID": [
4,
5
],
"judul": [
"Testing",
""
]
}
},
]
Hope someone can help me to solve this.
Simplify the problem being presented. You effectively want to turn an array of this object:
{
"prop1": "val",
"prop2": "val2"
}
Into an array of this object:
{
"newprop": {
"prop1": "val1",
"prop2": "val2"
}
}
You can project an array into a new shape with .map. For example:
var newArr = arr.map(x => {
return {
newprop: {
prop1: x.prop1,
prop2: x.prop2
}
}
});
So yours might look something like this:
var newArr = arr.map(x => {
return {
namaBagian: x.namaBagian,
bagianID: x.bagianID,
newKey: {
postID: x.postID,
judul: x.judul
}
}
});
If the shape of the objects is more dynamic, you could potentially make clever use of the spread operator to not have to specify every value explicitly. But the general principle is the same. What you're looking to do is map an array into a new array, where each element takes on a new shape built from the data on the existing element.

javascript check if any array is empty from an object [closed]

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There is an object
let response = {
"meta": {
"id": 781
},
"content": {
"title": "Test",
"min": "1",
"max": "30",
"series": [
{
"name": "A",
"data": []
},
{
"name": "B",
"data": [3, 5, 6]
}
]
}
}
I need to check if any array of key, data is an empty array from series array. So, basically
if any data is empty array from series {
// do something
}
How can I achieve that?
you can try this one
let temp = response.content.series;
let num_of_empty_arr=0;
for(let i=0;i<temp.length;i++){
let obj=temp[i];
if(obj.data.length==0)
num_of_empty_arr++;
}
console.log("totol empty arrays",num_of_empty_arr);
you can do this by looping through response.content.series
for(let i of response.content.series){
if(i.data.length === 0){
//do something
console.log(i.name)
}
}
some allows you to return a boolean (true or false) based on a condition. Use it on the series data and return a value based upon whether the data array has any elements.
let response={meta:{id:781},content:{title:"Test",min:"1",max:"30",series:[{name:"A",data:[]},{name:"B",data:[3,5,6]}]}};
let response2={meta:{id:781},content:{title:"Test",min:"1",max:"30",series:[{name:"A",data:[1,2]},{name:"B",data:[3,5,6]}]}};
function areSomeEmpty(data) {
return data.content.series.some(arr => !arr.data.length);
}
console.log(areSomeEmpty(response));
console.log(areSomeEmpty(response2));

Categorise JSON Data [closed]

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Hey please don't roast me. So i have a JSON data like this
data": {
"person": [
{
"id": "xx1",
"name": "John DOe",
},
],
"person": [
{
"id": "xx2",
"name": "John Snow",
},
],
}
For example, I want to store every person data whose name contains "o". How could I do that? Thank you
JSON object ,if have duplicate keys, it will replace the first one with the most bottom one .
In your sample data, there is two "person" keys. Therefore, at the end, your said data will succumb to this.
{"data":{"person":[{"id":"xx2","name":"John Snow"}]}}
Therefore, to clarify your data, IMHO, this is supposed to be like this in the first place.
"data": {
"person": [
{
"id": "xx1",
"name": "John DOe",
},
{
"id": "xx2",
"name": "John Snow",
},
]
}
Then you can treat data.person as an array and use Array.prototype function to filter out your desired details.
The filter method should be
const personWithNameO = data.person.filter((v) => v.name.includes("o") );
console.log(personWithNameO);

Modified JSON response from nestjs while creating API [closed]

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I do have json like below
[
[{
"id": "4e181c1b-0a68-425e-9eb7-df36324b6cdb",
"date_actual": {
"value": "2020-10-21T13:15:00"
},
"Date": "20201021",
"name": "abc"
},
{
"id": "4e181c1b-0a68-425e-9eb7-df36324qqq",
"date_actual": {
"value": "2020-1-21T13:15:00"
},
"Date": "2020102",
"name": "xyz"
}
]
]
want to modified like below
[
{
"id": "4e181c1b-0a68-425e-9eb7-df36324b6cdb",
"date_actual": "2020-10-21T13:15:00",
"Date": "20201021",
"name": "abc"
},
{
"id": "4e181c1b-0a68-425e-9eb7-df36324qqq",
"date_actual": "2020-10-21T13:15:00",
"Date": "2020102",
"name": "xyz"
}
]
My service class code is
const rows = await bigqueryClient.query(queryData);
console.log("old json"+JSON.stringify(rows));
return rows;
how to solve this issue using nestjs any way please help me ?
This isn't specific to NodeJS or NestJS, but is regular old JavaScript. As you have an array of values you can use the Array.prototype.map method to map to a new array
return origArray.map((val) => ({ ...val, date_actual: val.date_actual.value }))

How to design nested 3 level json [closed]

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I have an object like below:
Parent: { Child1: [ {name:'grandchild1', value:'abc', checked:true}, {name:'grandchild2', value:'pqr', checked:false} ], Child2: [ {name:'grandchild3', value:'abcd', checked:false}, {name:'grandchild4', value:'pqrs', checked:true} ], parent2{...........}.... };
How can I make it nested JSON.
Just like in root: parent1, parent2...
Child: children1, ....( Corresponding to parent)
Grandchildren: based on children
Please guide me how can I make it?
To make a JSON object you just have to follow JSON syntax
In your example it will look like:
{
"parent": {
"child1": [{
"name": "grandchild1",
"value": "abc",
"checked": "true"
}, {
"name": "grandchild2",
"value": "pqr",
"checked": "false"
}]
}
}
Please note that in JSON, string values must be written with double quotes.
If you need to get JSON string from object programmatically, you can write in javascript:
var myJSON = JSON.stringify(obj);

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