Html – trying to display an array of data with a button
I am trying to make a site where a user can press a button and then the data from an array can show on the screen. I cannot figure out how to do this. please help! (p.s. i'm a beginner.…
Javascript – how to get a total of an array each time the user add something?
i have a book shop that has books, and the user can add those books into cart, then the total price of those books is shown in the cart, each time he add something new, the state adds that number,…
Javascript filter parent array by value in child array
I have a 3-layer array that I want to filter out data based on the child array values. I can get semi-correct results but the last part I am having issues with. { "id": 1, "grandparent": "Timmy", "parents": [ {…
sum up property values when id matches and return the result using javascript
I am trying to achieve a pretty complex iteration but havent been successful so far using reduce. Here is a small example of it The input is as follows let input = { "data": [ { "state": "CA", "tests": 12,…
group array of object with common ids and concatenate their other properties using javascript
I am trying to achieve a pretty complex iteration but havent been successful so far using reduce. Here is a small example of it The input is as follows let input = { "data": [ { "state": "CA", "city": […
Json – Typescript Merge Array of Items
I have this type of array in the angular 14 [ { "parentItem": "WBP258R", "childItem": "WBP258R", "columnName": "Color", "oldValue": "Rainbow", "newValue": "Rainbow1" }, { "parentItem": "WBP258R", "childItem": "WBP258R", "columnName": "Pg #", "oldValue": "4", "newValue": "44" }, { "parentItem": "WBP258R", "childItem":…
Javascript – When I click a button my style dosen't work at all
when i click button for example(remove btn or add btn), the selected style dosen't work at all??? i think somthing went wrong in renderList function but i can't find it. i check other lines and i don't find the my…
Javascript – Removing lines of text that match strings in an array
I haven't been able to find a satisfactory solution to remove lines of text that match keywords in an arrays of strings. A typical application would be, for instance, YAML frontmatter, which we want to filter of non applicable properties.…
Javascript – React useState for Updating Array of Component
I am currently facing difficulties in updating my Component Array. My current code is as following: import React from 'react'; import ReactDOM from 'react-dom'; const Item = ({ value }) => { return ( <div className="col"> <div className="card" style={{width: "30rem"}}>…
Javascript – merge the result of map in one array
const data = { data: [ { entry: [ { id: 1, title: "hello", }, { id: 2, title: "hi", }, ], }, { entry: [ { id: 3, title: "hola", }, { id: 4, title: "hey", }, ], },…