This is my home page and getting list data then creating List component as much as need. Then going to List component and creating list item. so creating new component using map function. I tried different ways for it but I can’t figure out. It goes infinite loop whatever I did. Home.jsx in List compone…
Tag: dictionary
Javascript dictionary keys not updating within an axios request
I currently have the following code in my app: Where getUserData and getTestData interact w/ my external API. The getTestData endpoint returns something like {success: True/False, json: {String key: {time: UNIX time, value: float}}} After running this, I would thus expect testData to look like {CM10: [{x: tim…
JS Object Mapping Quesions
I’ve been trying to understanding this part of the code: at line 9. What does the “map[stack[stack.length-1]]” mean? At first I thought the map is an object, but I think you are supposed to add ” ” mark around the properties. Is map a data structure? if it is, How can I use this …
Map array of an array to an object in JavaScript [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question I’m trying to convert an array within an array that looks like this To an object that l…
Javascript Mapping Array of Objects within an Array
I know there have been some similar questions before but I’m really stuck on trying to map the below array of information (I’ve tried to implement several example). I have an Array with two information fields and a third field that contains Arrays of objects. I want to extract the name of each of …
JS list of dictionaries, get first value by condition
Given a list of dictionaries in JS, I want to get the first one that is enabled and not deleted. The dictionary will look like this: I used to take the first one by using objects[0] but now I need to tkae the deleted and enabled in consideration. How can I get the first relevant value? so the results should
How to use `(K | V)[][]` as `ReadonlyArray` in a Map?
I would like to use a (K | V)[][] as ReadonlyArray<[K, V]> in a Map constructor. Lets say that our V is an interface IItem and K a basic number. By default, typescript will perceive the type of items as : (number | IItem)[][]. This will not work and throw an error: Argument of type ‘(number | { ke…
How can I call function on event listener to change class using map method
I have two buttons, button 1 and button 2 of different classes with different color and background color. When mouseover button 1 I want the color and background color to change to the color and background color of button 2 and and the color and background color of button 2 to change to the color and backgrou…
Convert Array in Map or 2D Array
So I basically have a gradebook that is a .csv file and is formatted like this name, grade name, grade I am looking for the best way to split my array so that I can access each independently but they are still related to each other. This is my current code so it currently splits the original text into the
How Can I get the Map key by a certain value? E.g. Map.prototype.get -> key by the lowest value
Imagine my elementsMap has following key Value pairs: How can I get the key by the lowest value? For Maps, see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get EDIT: Please do not convert it into an array ADDENDUM If I use finally TypeScript with the solution below, I …