All Questions
Tagged with object ecmascript-6
99
questions with no upvoted or accepted answers
5
votes
0
answers
399
views
JavaScript - proxy object to behave like primitive
I'm trying to build a system that "caches" calls to a library before that library has loaded.
This is similar to what the Google Analytics "setup" code is doing with the _gaq variable - it's ...
- 401
4
votes
4
answers
2k
views
Get previous object item in javascript
I have an object with keys and data. From a key I want to get the previous item.
I've seen similar topics before but the solutions are really complicated.
I also added a function that does not work ...
- 24.3k
3
votes
2
answers
126
views
How can I reduce the logarithmic cost of this function
At the work we are now trying to improve the performance of the code. So, to do that, we want to avoid the logarithm cost of the functions.
If you have a loop inside of a loop it has a higher cost, ...
- 2,544
2
votes
0
answers
93
views
Javascript Object() vs new Object() for ES6
I've seen a number of questions about new Object vs new Object() or new Object() vs {}, but I'm wondering about what the difference is between Object() and new Object()? In other words, what's the ...
- 455
2
votes
0
answers
300
views
Internal Methods [[GetOwnProperty]]
I faced an question when I was reading ECMAScript® 2021 Language Specification.
In this document in section "6.1.7.2 Object Internal Methods and Internal Slots" in "Table 6", ...
- 543
2
votes
3
answers
912
views
handle multiple checkboxes and complex data structure (reactjs)
Since I am pretty new to React and also not a huge expert on JS especially ES6, I wonder how to make my code (that works) prettier and refactor it.
I want to handle multiple checkboxes in a form and ...
- 1,218
2
votes
3
answers
2k
views
Can I import one method from object.freeze
export default Object.freeze({
fetchReseller: ({ offset, limit }) => ({
type: FETCH_RESELLER,
payload: { offset, limit },
}),
// deleteReseller: ... etc
})
How do I import only one ...
- 733
1
vote
2
answers
52
views
Converting object to array with objects
I need help sorting this out, I tried object.keys with map, but can't get too far, so, I have this object and each key has an array:
const first = {
"apples": [
"5.78",
...
- 43
1
vote
2
answers
81
views
How to map an array of Object in Javascript
I am stuck with mapping in array of objects.
Please find the below code
const array = [
{
user: "User1",
cities: ["city1", "city2", "city3"],
},
{
...
- 157
1
vote
1
answer
160
views
JS or TS - Getting the keys of a interface
Say I have an interface like:
export interface Album{
id: string,
code: string,
title: string,
description: string,
publisher: string,
}
(It's actually quite long - I've just ...
- 8,740
1
vote
5
answers
500
views
How to delete an item from an object of ids
const comments = {
'1': { id: '1', text: 'please add code examples' },
'2': { id: '2', text: 'examples would be great for this article' },
'3': { id: '3', text: 'hi there' },
};
const ...
- 569
1
vote
2
answers
700
views
Destructuring an Object fields and Calculating the Sum in Javascript
I am having trouble figuring out how to destructure and add the total sum of an object with fields. Previously we bad separate objects in an object array. Now they are summed in 1 object and it looks ...
- 10.9k
1
vote
3
answers
63
views
Iterating a Json object and storing the end result
I am trying to iterate a JSON object which is an array of categories.The categories may or may not have the subcategory.
If
hasSubcategory = false ,
then category id should be stored in final array.
...
1
vote
1
answer
751
views
How to replace array.join using a comma with using a line break
I am using rest parameters ... to collect all keys in an array.
For mapping the wanted keys, you could join all wanted property values.
using
function getValues(array, ...keys) {
return ...
- 463
1
vote
1
answer
308
views
Getting items from objectstore returns [object Object] in HTML
Right now I'm looping through all objects in the object store "tasksStore". When I try to embed the objects into my HTML it only returns [object Object]. If I try to specify a part of the ...
- 267