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I have this code,
"data": [
{
"pid": 1,
"status": "done",
"title": "a"
},
{
"pid": 1,
"status": "pending",
"title": "a"
},
{
"pid": 1,
"status": "pending",
"title": "21"
},
{
"pid": 2,
"status": "pending",
"title": "c"
}
]
I am trying to process it like this
"data": [
{
"pid": 1,
"done": 1,
"pending":2
},
{
"pid": 2,
"done": 0,
"pending":1
}
]
I have tried much to produce my desired results but no luck, now i m posting here to get some help.
thanks
You should be able to use Array.reduce for this purpose.
We create a map, keyed by pid then add 1 for each done or pending object.
Object.values will then turn this map into an array again.
I hope this helps you!
data = [
{
"pid": 1,
"status": "done",
"title": "a"
},
{
"pid": 1,
"status": "pending",
"title": "a"
},
{
"pid": 1,
"status": "pending",
"title": "21"
},
{
"pid": 2,
"status": "pending",
"title": "c"
}
]
let result = Object.values(data.reduce( (map, d) => {
if (!map[d.pid]) map[d.pid] = { pid: d.pid, done: 0, pending: 0 };
if (d.status === "done") map[d.pid].done++;
if (d.status === "pending") map[d.pid].pending++;
return map;
}, {} ));
console.log("Result:", result);
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I have array object like this.
[
{
"name": "name1",
"type": "type1",
"car": "car1",
"speed": 1
},
{
"name": "name1",
"type": "type1",
"car": "car2",
"speed": 2
},
]
And i want to convert it single object for prevent data replay.
How can i do this?
{
"name": "name1"
"type": "type1",
"car": [
"car1",
"car2",
],
"speed": [
1,
2,
],
}
Could someone help me? Thanks.
If name and type can have same value and car and speed various,then below is a reference for you
Note: in order to get an expected answer(solution),you need to make you question more clear,the most important thing is the value of which properties various
const data = [
{
"name": "name1",
"type": "type1",
"car": "car1",
"speed": 1
},
{
"name": "name1",
"type": "type1",
"car": "car2",
"speed": 2
},
]
const result = data.reduce((a,v) =>{
let obj = a.find(i => i.name == v.name)
if(obj){
obj.car.push(v.car)
obj.speed.push(v.speed)
}else{
a.push({'name':v.name,'type':v.type,'car':[v.car],'speed':[v.speed]})
}
return a
},[])
console.log(result)
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How i can get title or body from the following json response?
{
"message": "All Books",
"data": {
"current_page": 1,
"data": [
{
"id": 2,
"title": "The Quran",
"slug": "the-quran",
"body": "The Holy Quran",
"book": "/storage/books/1602685137.pdf",
"cover": "/storage/covers/1602685137.jpg",
"os": "both",
"price_ios": 0,
"price_android": 0,
"created_at": "2020-10-14T14:18:57.000000Z",
"updated_at": "2020-10-14T14:18:57.000000Z"
}
],
"first_page_url": "https://book.test/api/v1/books?page=1",
"from": 1,
"last_page": 1,
"last_page_url": "https://book.test/api/v1/books?page=1",
"links": [
{
"url": null,
"label": "Previous",
"active": false
},
{
"url": "https://book.test/api/v1/books?page=1",
"label": 1,
"active": true
},
{
"url": null,
"label": "Next",
"active": false
}
],
"next_page_url": null,
"path": "https://book.test/api/v1/books",
"per_page": 15,
"prev_page_url": null,
"to": 1,
"total": 1
}
}
Say the json is stored in a variable res.
Since the second data object is stored as an array [].
title = res['data']['data'][0]['title'];
body = res['data']['data'][0]['body'];
If you find a case where the array has more than one object, then you will have to change 0 to the index of the object in the array.
Reference: www.json.org
Assuming your JSON is assigned to a variable called response you can access the body with:
let body = response.data.data[0].body
And the title with
let title = response.data.data[0].title
In case you want to loop over the data array in order to get a value for all entries (e.g. title), try this:
let titles = response.data.data.forEach(entry => console.log(entry.title));
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I have an array of JSON objects and I want to merge the objects that have the same text together while finding the average of relevance and the sum of count across all of the same instances.
var keywords = [
{
"text": "service businesses",
"relevance": 0.626303,
"count": 1
},
{
"text": "service businesses",
"relevance": 0.87319,
"count": 5
},
{
"text": "service businesses",
"relevance": 0.05,
"count": 100
},
{
"text": "restaurants",
"relevance": 0.614567,
"count": 16
},
{
"text": "restaurants",
"relevance": 0.609875,
"count": 4
},
{
"text": "hotels",
"relevance": 0.594905,
"count": 1
},
I tried the solution posted here but, I am getting an output like this:
{
text: 'service businesses',
count: '[object Object][object Object]'
}
The output I am hoping for would look like this:
{
"text": "service businesses",
"relevance": 0.516497667,
"count": 106
},
{
"text": "restaurants",
"relevance": 0.612221,
"count": 20
},
{
"text": "hotels",
"relevance": 0.594905,
"count": 1
},
Any help is much appreciated!
Using Array.prototype.reduce, you can group the elements by the text and based on that group data, can get the output as follows.
var keywords = [{
"text": "service businesses",
"relevance": 0.626303,
"count": 1
},
{
"text": "service businesses",
"relevance": 0.87319,
"count": 5
},
{
"text": "service businesses",
"relevance": 0.05,
"count": 100
},
{
"text": "restaurants",
"relevance": 0.614567,
"count": 16
},
{
"text": "restaurants",
"relevance": 0.609875,
"count": 4
},
{
"text": "hotels",
"relevance": 0.594905,
"count": 1
}
];
const groupBy = keywords.reduce((acc, cur) => {
acc[cur.text] ? acc[cur.text] = {
...acc[cur.text],
count: acc[cur.text].count + cur.count,
relevance: [...acc[cur.text].relevance, cur.relevance]
} : acc[cur.text] = {
...cur,
relevance: [cur.relevance]
};
return acc;
}, {});
const output = Object.values(groupBy).map((item) => ({
...item,
relevance: item.relevance.reduce((acc, cur) => acc + cur, 0) / item.relevance.length
}));
console.log(output);
I ran it in two for loops and then calculated the relevance on the second loop.
I just kept track of the values in a normal object.
var keywords = [
{
"text": "service businesses",
"relevance": 0.626303,
"count": 1
},
{
"text": "service businesses",
"relevance": 0.87319,
"count": 5
},
{
"text": "service businesses",
"relevance": 0.05,
"count": 100
},
{
"text": "restaurants",
"relevance": 0.614567,
"count": 16
},
{
"text": "restaurants",
"relevance": 0.609875,
"count": 4
},
{
"text": "hotels",
"relevance": 0.594905,
"count": 1
}
]
const objectMerge = (arr) => {
let map = {};
for(let idx in arr){
const { text, relevance, count } = arr[idx];
if(!map[text]){
map[text] = {
count: 0,
relevance: []
}
}
map[text].count += count
map[text].relevance.push(relevance)
}
for(const key in map){
let lenOfRelevance = map[key].relevance.length
map[key].relevance = map[key].relevance.reduce((a,b) => a+b) / lenOfRelevance
}
return map
}
console.log(objectMerge(keywords))
This question already has answers here:
How to get names of enum entries?
(43 answers)
Closed 4 years ago.
I have an enum file where I have defined an object for PaymentTypes:
export enum PaymentTypes {
Invoice = 1,
CreditCard = 2,
PrePayment = 3,
}
Now, when I receive data as an array from my database I also receive the PaymentType as a number:
order:
[
{ "id": 0, "name": "Available", "PaymentType": 1 },
{ "id": 1, "name": "Ready", "PaymentType": 3 },
{ "id": 2, "name": "Started", "PaymentType": 2 }
];
Now my question is, how can I filter out each payment type in the array and convert the number to the string that's defined in the enum file so that I can us this data to display it to the user in the front end?
So that I have something like this that I can work with:
orderFiltered:
[
{ "id": 0, "name": "Available", "PaymentType": "Invoice" },
{ "id": 1, "name": "Ready", "PaymentType": "PrePayment" },
{ "id": 2, "name": "Started", "PaymentType": "CreditCard" }
];
You can use map to create a new array of objects that contains the original data and the name of the enum member, which you can get using PaymentTypes[PaymentType]
let order = [
{ "id": 0, "name": "Available", "PaymentType": 1 },
{ "id": 1, "name": "Ready", "PaymentType": 3 },
{ "id": 2, "name": "Started", "PaymentType": 2 }
];
enum PaymentTypes {
Invoice = 1,
CreditCard = 2,
PrePayment = 3,
}
let orderFiltered = order.map(o => Object.assign({}, o, { PaymentTypeDisplayName: PaymentTypes[o.PaymentType] }));
console.log(orderFiltered);
One thing to note though is that using the enum member name as a display might not be the friendliest of use experiences.
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I have this JSON data with me and I want to get the value of slug from every child.
The main problem is I don't know how much children will be generated after every time I got new data. In short generation of a child inside the child is dynamic that is not fixed.
So, How can I get the value of slug from every child that is present in JSON data?
Here I write one JSON data:
[
{
"id": 11,
"title": "Bottle",
"__domenu_params": {},
"href": "www.products.com",
"target": "_blank",
"slug": "/undefined"
},
{
"id": 10,
"title": "Pencils",
"__domenu_params": {},
"slug": "/Pencils"
},
{
"id": 9,
"title": "Stationary",
"__domenu_params": {},
"slug": "/Stationary"
},
{
"id": 8,
"title": "Pen",
"__domenu_params": {},
"slug": "/Pen"
},
{
"id": 7,
"title": "Cable",
"__domenu_params": {},
"slug": "/Cable"
},
{
"id": 5,
"title": "Electronics",
"__domenu_params": {},
"slug": "/Electronics",
"children": [
{
"id": 4,
"title": "Charger",
"__domenu_params": {},
"slug": "/Charger"
},
{
"id": 3,
"title": "Laptop",
"__domenu_params": {},
"slug": "/Laptop"
},
{
"id": 2,
"title": "Mobile",
"__domenu_params": {},
"slug": "/Mobile",
"href": "www.electronics.com",
"target": "_blank",
"children": [
{
"id": 6,
"title": "Pendrive",
"__domenu_params": {},
"slug": "/Pendrive",
"href": "www.pendrive.com",
"target": "_self"
}
]
}
]
}
]
I tried this code and get the value of slug from this JSON only. What should I do to get for every possible JSON data?
let data = [{"id":11,"title":"Bottle","__domenu_params":{},"href":"www.products.com","target":"_blank","slug":"/undefined"},{"id":10,"title":"Pencils","__domenu_params":{},"slug":"/Pencils"},{"id":9,"title":"Stationary","__domenu_params":{},"slug":"/Stationary"},{"id":8,"title":"Pen","__domenu_params":{},"slug":"/Pen"},{"id":7,"title":"Cable","__domenu_params":{},"slug":"/Cable"},{"id":5,"title":"Electronics","__domenu_params":{},"slug":"/Electronics","children":[{"id":4,"title":"Charger","__domenu_params":{},"slug":"/Charger"},{"id":3,"title":"Laptop","__domenu_params":{},"slug":"/Laptop"},{"id":2,"title":"Mobile","__domenu_params":{},"slug":"/Mobile","href":"www.electronics.com","target":"_blank","children":[{"id":6,"title":"Pendrive","__domenu_params":{},"slug":"/Pendrive","href":"www.pendrive.com","target":"_self"}]}]}]
for (let i = 0; i< data.length ; i++) {
// console.log(data[i]["children"])
if (data[i]["children"]) {
console.log("inside")
for (let j = 0; j < data[i]["children"].length; j++) {
// console.log(data[i]["children"][j])
if (data[i]["children"][j]["children"]) {
console.log(data[i]["children"][j]["children"])
}
}
}
}
You can use Recursion to parse this data easily:
let data = [{"id":11,"title":"Bottle","__domenu_params":{},"href":"www.products.com","target":"_blank","slug":"/undefined"},{"id":10,"title":"Pencils","__domenu_params":{},"slug":"/Pencils"},{"id":9,"title":"Stationary","__domenu_params":{},"slug":"/Stationary"},{"id":8,"title":"Pen","__domenu_params":{},"slug":"/Pen"},{"id":7,"title":"Cable","__domenu_params":{},"slug":"/Cable"},{"id":5,"title":"Electronics","__domenu_params":{},"slug":"/Electronics","children":[{"id":4,"title":"Charger","__domenu_params":{},"slug":"/Charger"},{"id":3,"title":"Laptop","__domenu_params":{},"slug":"/Laptop"},{"id":2,"title":"Mobile","__domenu_params":{},"slug":"/Mobile","href":"www.electronics.com","target":"_blank","children":[{"id":6,"title":"Pendrive","__domenu_params":{},"slug":"/Pendrive","href":"www.pendrive.com","target":"_self"}]}]}]
function getAllSlugs(categories) {
// For each category...
return categories.reduce((slugList, category) => {
// add the slug for the particular category...
slugList.push(category.slug);
// and, check if the category has children...
if (category.children && category.children.length) {
// if children are there, call the same function with the
// children and add the slugs of children
slugList = slugList.concat(getAllSlugs(category.children));
}
return slugList;
}, []);
}
// Call the function
getAllSlugs(data);
Output:
[ '/undefined',
'/Pencils',
'/Stationary',
'/Pen',
'/Cable',
'/Electronics',
'/Charger',
'/Laptop',
'/Mobile',
'/Pendrive' ]
Hope this helps!