All Questions
17
questions
2
votes
1
answer
39
views
How to assign object with properties to property of an object using reduce
I have a data like this
const dataSet = [
{
'Transactions.productRef': 'SomeRef/123',
'Transactions.itemCount': 25,
'Transactions.revenue': 1000,
},
{
'Transactions....
- 619
-1
votes
2
answers
110
views
Edit a specific object property keeping the same object structure
Let's say I have this object:
a = {
key1: {
name: 'a',
import: 1234.7896,
discount: 122.34553
}
key2: {
name: 'b'
import: 8976.09998,
discount: 12.890999
}
}
and I ...
- 416
1
vote
2
answers
2k
views
Create an object with key-value pairs from an array
Having this input array:
const myArray = [{value: "test"}, {value: "abc"}, {value: "xyz"}];
the desired result is this: result = { "value1": "test", &...
- 301
0
votes
2
answers
94
views
How to group array of objects by common property and put other properties together
I have an array of objects like this
const statuses = [
{time: '21/1/1990', 'Status.sold': 8848},
{time: '21/1/1990', 'Status.reserved': 8804},
{time: '21/1/1991', 'Status.reserved': 8756},
{...
- 619
1
vote
3
answers
709
views
How to subtract object values and add result to a new property
I have an array of objects like this
const arr = [
{time: '21/1/1998', sold: 8848},
{time: '21/1/1997', sold: 8804},
{time: '21/1/1996', sold: 8756},
{time: '21/1/1995', sold: 8732},
{time: '...
- 619
0
votes
3
answers
103
views
Using reduce and sort together (JavaScript)
I have an array of objects (groceryArray) that I would like to organize into an object by the groupId property (object keys) and finally sort these keys by the groupDisplayOrder property. See ...
- 433
2
votes
3
answers
724
views
Restructure array of objects then grouping objects
So I have found a solution, but I am still learning and feel like my solution is too long. It does not use all of ES6 and could be better. I would love any feedback and/or suggestions.
The data looks ...
- 101
0
votes
4
answers
115
views
Group array of object by key - javascript
Before anything, I did look for the other answers on the internet but I still can't get it to work and I don't know why
So, I have an array with objects:
array =[
{
"name":"...
- 133
0
votes
1
answer
69
views
Why item inserted in object? [closed]
I found an groupby implementation in ES6 for grouping this data object:
const pets = [
{type:"Dog", name:"Spot"},
{type:"Cat", name:"Tiger"},
{type:&...
- 27
2
votes
2
answers
516
views
JavaScript: Reduce an array to nested objects
So suppose my array looks like this:
let langArr = [
["python", "blue"]
,["python", "blue"]
,["c++", "red"]
,["java", "yellow"]
,["javascript", "lime"]
,["shell", "green"]
...
- 317
2
votes
1
answer
107
views
Flip key value pair on 1 lvl depth
I have object:
const pairs = {
A: { D: [1, 2, 3] },
B: { D: [3, 2, 1] },
C: {
D: [4, 3, 2, 1],
B: [0, 1, 2, 3]
}
};
How can I get it fliped?
const fliped = {
D: { A: [1, 2, 3], B: ...
- 107
4
votes
6
answers
235
views
JS reduce - sum only array lengths in object
I have the following data structure:
const arr = [
{key: 0, x: [], y: []},
{key: 0, x: [], y: []}
]
I want to check if all arrays are empty, I have how can I do this using reduce? My ...
- 5,050
-2
votes
4
answers
103
views
How to get some props of list array object by using reduce
I have list array object like:
let arr = [
{ a: 1, b: 2, c: 3, d: 4 },
{ a: 2, b: 3, c: 4, d: 5 },
{ a: 5, b: 6, c: 7, d: 8 }
]
and after using reduce()
// get props **b, c**
let ...
- 166
1
vote
4
answers
104
views
Convert array of objects to array of arrays (by attribute)
I want transform my array to array of arrays by attribute "icon".
const array = [
{ icon: true },
{ icon: false },
{ icon: false },
{ icon: true },
{ icon: false }
]
I need:
[[{icon: ...
- 65
0
votes
0
answers
349
views
Redux reducer - object destructuring does not work
I'm struggling with object destructuring using this syntax:
const { [key]:value, ...allNewUserMsgs } = allUserMsgs
where (example)
allUserMsgs = {
0 : {number: 0, text: "Those kumquats are nothing ...
- 23