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I am trying to convert array of objects into a final output of objects. I have an array of objects as mentioned below:
[ { "id": "11", "value" : "9999","sample":"1"},
{ "id": "22", "value" : "8888","sample":"2"},
{ "id": "33", "value" : "7777","sample":"3"}
];
I need output as below:
{
{ "id": "11", "value" : "9999","sample":"1"},
{ "id": "22", "value" : "8888","sample":"2"},
{ "id": "33", "value" : "7777","sample":"3"}
}
can anyone help on this ?
Your Object is not valid in javascript. You can do the following:
const arr = [ { "id": "11", "value" : "9999","sample":"1"},
{ "id": "22", "value" : "8888","sample":"2"},
{ "id": "33", "value" : "7777","sample":"3"}
]
const obj = {}
arr.forEach(({id, value, sample}) => {
obj[id] = {value, sample}
})
console.log(obj)
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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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i need to convert JSON object to a specific list. My JSON looks like this:
{
"data": {
"data_first": {
"2014-03-14T10:07:31": [
{
"name": "name"
},
{
"name": "name"
}
],
"2014-03-14T10:08:30": [
{
"name": "name"
},
{
"name": "name"
}
]
}
}
}
and what i need is:
{
"data": [
{
"date": "2014-03-14T10:07:31",
"values": [
{
"name": "name"
},
{
"name": "name"
}
]
},
{
"date": "2015-03-14T10:09:31",
"values": [
{
"name": "name"
},
{
"name": "name"
}
]
}
]
}
I need an array of objects, where the data should be an object value as my example below. Can you help?
You can use this in javascript.
const data = your json object.data;
const result = {data: Object.keys(data.data_first).map(key => ({date: key, values: data.data_first[key]}))};
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I have parent-child JSON data and I want to get all children (nested children) from a selected parent in the specific year-wise data format as below
var data = [{ "Id": "1", "Name": "abc", "EnteredOn": "03/01/2019", "attr": "abc" },
{ "Id": "2", "Name": "abcd", "EnteredOn": "02/01/2018", "attr": "abc" },
{ "Id": "3", "Name": "abcde", "EnteredOn": "04/01/2019", "attr": "abc" },
{ "Id": "4", "Name": "abcdef", "EnteredOn": "01/01/2016", "attr": "abc" }];
output:
{
"year": "2019",
"children": [
{
"ID": "1",
"Name": "abc",
"Date": "03/01/2019"
}
]
}
First, i recommend adding year attribute
data.forEach(a=> a['year'] = a.EnteredOn.getFullYear()
and using Lodash _.groupBy function
data.groupBy("year")
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I got object array A as this:
[
{
"Timestamp": "2015-10-01 00:00:00",
"Label": "Voltage",
"Value": "230.12"
},
{
"Timestamp": "2015-10-01 00:00:00",
"Label": "Frequency",
"Value": "50.12"
},
{
"Timestamp": "2015-10-01 00:00:00",
"Label": "Power",
"Value": "23"
},
{
"Timestamp": "2015-10-02 22:22:22",
"Label": "Voltage",
"Value": "231.12"
},
{
"Timestamp": "2015-10-02 22:22:22",
"Label": "Frequency",
"Value": "51.12"
},
{
"Timestamp": "2015-10-02 22:22:22",
"Label": "Power",
"Value": "23.4"
}
]
I want to transform to object array B as this:
[
{
"Timestamp": "2015-10-01 00:00:00",
"Voltage": "230.12",
"Frequency": "50.12",
"Power": "23"
},
{
"Timestamp": "2015-10-02 22:22:22",
"Voltage": "231.12",
"Frequency": "51.12",
"Power": "23.4"
}
]
I was looping to get the timestamp and re-loop again to get label and value to form new object array. It works but when the data become few hundred thousands object array then it's not efficiency and crash the browser. Would someone can think of a better way please. Thanks very much.
JSON is just a transport/storage format. It's generally not something you should attempt to manipulate directly. Best to manipulate the actual JavaScript objects/arrays.
If you can guarantee the original array sort order, try something like this:
var outputArray = [];
var currentObj = null;
originalArray.forEach(function (measurement) {
if (!currentObj || currentTimestamp !== measurement.Timestamp) {
currentTimestamp = measurement.Timestamp;
currentObj = {
Timestamp: measurement.Timestamp;
}
outputArray.push(currentObj);
}
currentObj[measurement.Label] = measurement.Value;
});
Then, you can just loop through and build the new array as you go.
As your desired output showed ignoring the time of the timestamp this will trim that part of the timestamp - if that was a mistake in the question I think you should be able to remove that part by yourself
var b = a.reduce((acc, cur) => {
var strippedTimestamp = cur.Timestamp.substring(1, 10) + " 00:00:00";
var obj = acc.find(e => e.Timestamp == strippedTimestamp);
if (!obj) {
obj = { Timestamp: strippedTimestamp };
acc.push(obj);
}
obj[cur.Label] = cur.Value;
return acc;
}, []);
will output
[
{
"Timestamp": "015-10-01 00:00:00",
"Voltage": "230.12",
"Frequency": "50.12",
"Power": "23"
},
{
"Timestamp": "015-10-02 00:00:00",
"Voltage": "230.12",
"Frequency": "50.12",
"Power": "23"
}
]
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var v = [
{
"message": {
"code": "S200",
"message": "Success"
},
"data": {
"car": [
{
"id": 1,
"val": "Toyota"
},
{
"id": 2,
"val": "Honda"
},
{
"id": 3,
"val": "Nissan"
}
],
"truck": [
{
"id": 1,
"val": "Benz"
},
{
"id": 1,
"val": "Volvo"
}
]
}
}
]
I have a dynamic json shown like above.
how could get v[0].data.car node dynamically(without using v[0], v[1] etc) in undescorejs or angularjs. Is Hashmap is possible?.
You need to iterate through the array in angularjs, like this
v.forEach(function(element){
console.log(element.data.car[0]);//Over here you can again iterate the car array, I have used the first element instead
});