"Destructuring allows you to bind a set of variables to a corresponding set of values anywhere that you can normally bind a value to a single variable" ("Common Lisp the Language").
Questions tagged [destructuring]
1338 questions
0
votes
2 answers
How can I destructure with a vector from a var
I want to do this
(let [[a b c] '(1 2 3)]
{:a a :b b :c c}) ;; gives {:a 1, :b 2, :c 3}
But with [a b c] saved in a vector like this
(def vect '[a b c])
(let [vect '(1 2 3)]
{:a a :b b :c c}) ;; complains that a is unresolved
Is it possible to…
snowape
- 1,274
- 10
- 23
0
votes
2 answers
Is it possible to destructure a map in a bind?
Is it possible to do this in one function:
(binding [*configs* (merge default-configs configs)]
(let [{:keys [login url max-pages]} *configs*]
..
When I tried this:
(binding [{:keys [login url max-pages] :as *configs*} (merge…
Daniel Kaplan
- 62,768
- 50
- 234
- 356
-1
votes
1 answer
Is it bad practice to override the props in React functional components?
I'm trying to specify default values for optional props for a React component.
I can do this, and the I can get the value of the optional property 'y' correctly.
interface CompProps {
x: number;
y?: number;
}
const compPropsDefault: CompProps =…
jetxs
- 5
- 3
-1
votes
1 answer
How to destructure all of the objects from the nested arrays?
An array containing objects with attributes that have nested arrays containing more objects with attributes in it.
const courses = [
{
name1: 'Half Stack application develop',
id: 1,
parts: [
{
name: 'Fundamentals of…
Daniel
- 13
- 1
-1
votes
3 answers
How to Convert object into array of object?
I'm having object like this,
const rolePermission = {
adminView: true,
adminCreate: true,
adminDelete: true,
userView: true,
userEdit: true,
userDelete: false,
};
i expecting like this,
const rolePermission = [
{…
Nandha
- 37
- 5
-1
votes
1 answer
Can I add a method to a Typescript tuple (or, equivalently, destructure an object as an array)?
Let's say I want my function to a simple Typescript 2-tuple:
type SuperTuple = [number, string]
function torgle(value: string): SuperTuple {
return [value.length, value]
}
This allows me to conveniently destructure the return value of…
Sasgorilla
- 2,403
- 2
- 29
- 56
-1
votes
1 answer
Null guarding a destructure inside a map
Do you know is there a way of null guarding a destructure that happens inside a map?
For example, if my array's first element's age is null then is there a way of writing it so that it doesn't crash when iterating over the destructured…
pyan
- 865
- 2
- 12
- 23
-1
votes
2 answers
Destructuring an array (2 columns by 3 rows) stored in a single variable into 3 separate variables JS
I have an array stored in a variable called data_array. When alerting, the data is shown as follows:
1 car
2 truck
3 boat
I would like to extract the second column of data based upon the first column.
If col1 = 1 then var1 = car, if col1 = 2 then…
genuis
- 1
- 2
-1
votes
2 answers
How to define constructor function with destructuring in Javascript
I want to build a Vehicle class to create objects based on it. And I want to pass an object to the constructor function as a parameter such that const vehicle = new Vehicle({vehicleType: 'car', name: 'car1', range: 500})
I have built it like below…
Balalayka
- 187
- 2
- 15
-1
votes
1 answer
How do I stringify and "numberify" destructured variables passed to components in React.js
Here's my code:
function Information({
rating,
imax,
audiodescription,
closedcaptioning,
releaseyear,
runtime,
}) {
const runtimeHours = Math.round(runtime / 60);
const runtimeMinutes = runtime % 60;
const…
Matthew Waldrop
- 1
- 2
-1
votes
1 answer
How to destructure a nested object with special character and using object alias
I have been wondering if there is a way I can destructure this object in the snippet.
Here is what I have tried but it seems not working...
const {
_links: {
self: [{ href: mainMedia }],
},
_links: { "wp:attachment":…
Nazehs
- 478
- 1
- 10
- 19
-1
votes
1 answer
destructing array containing objects
let chosen = 4;
let team = [
{ titel: "ahmad", age: 20, available: true, skills: ["html", "css"] },
{ titel: "mizo", age: 30, available: false, skills: ["js", "react"] },
{ titel: "jo", age: 40, available: true, skills: ["pyhton", "django"]…
Ahmad_Yousif
- 58
- 4
-1
votes
3 answers
What is finally exported from the file, is it array or object after manipulation shown on the screenshot?
I actually have ESlint errors which don't allow me to do so. I have copy-pasted this this piece of code from the styled-system official website.
So, in the end, what do I get in breakpoints? Is it object or array?
jakhando
- 113
- 1
- 9
-1
votes
1 answer
How to destructure an object and update MySQL with keys and values?
I am passing data from a react frontend to an express backend:
axios.post('http://localhost/api', {foo: true, bar: false});
In the backend I am updating a MySQL database like
app.post("/user", (req, res) => {
const {foo, bar} = req.body;
const…
Nick Rick
- 75
- 6
-1
votes
1 answer
How can I Destructure or optimize the typescript code?
In my typescript class I have skip function. In my interface I have mentioned data coming from backend.
On the front end I would like to rename the backend variable as shown below. There are multiple variables, how can I optimize the code?
I thought…
Tejas Mehta
- 281
- 1
- 4
- 17