I’m trying to map the array in my JSON file but I’m doing something wrong and I can’t figure out what. When I do console.log the result is "undefined". I have the feeling that the error might be in my JSON file and not necessarily in the .map function but I can’t figure it out.… Read More Why is my JSON array prototype mapping not working?
here his code give me undefind i want add a new user to the name list I don’t know where is the problem there is cardList component import React from ‘react’; import Card from ‘../Card/Card’; const CardList = ({ namesList, deleteFunc }) => { console.log(namesList); const cards = namesList?.map(({ id, …otherProps }) => { return… Read More add new user namesList.map
I am new to React and I have a question. I have two useStates const [min, setMin] = useState(""); const [new, setNew] = useState(""); A function that takes the value of the first parameter and, after a check, uses the second parameter to make the set of the useState const checkOne = (evt, setstate) =>… Read More Use map() with useState and functions
Here is an array of objects const items = [{description: "Cement", total: "150"}, {description: "Mortar", total: "200"}, {description: "Sand", total: "100"}] I want to add the total of each object to a variable so that i can get the grand total of everything. I have tried mapping through the items array and then for each… Read More How to map through an array of objects and add the total in each object to a variable in Javascript
I want to make my IonIcons dynamic so they are reusable. But i need to set it in {} I dont know how i do this with a .map() element. import React from "react"; import { IonIcon, IonLabel } from "@ionic/react"; import styles from "./quickOptions.module.css"; import { alarmOutline, personOutline, cartOutline } from "ionicons/icons"; export default… Read More dynamic ionic icon with react typescript
I have two arrays: Array 1: [‘0000037_165’, ‘0000037_62’, ‘0000037_74’, ‘0000037_165’, …] Array 2: [ {SiteUniqueID: ‘0000037_165’, Description: ‘Description 1’}, {SiteUniqueID: ‘0000037_165’, Description: ‘Description 2’}, {SiteUniqueID: ‘0000037_62’, Description: ‘Description 1’}, {SiteUniqueID: ‘0000037_74’, Description: ‘Description 1’}, {SiteUniqueID: ‘0000037_165’, Description: ‘Description 1′}, … ] I need to map over both arrays and check if the ‘SiteUniqueID’ from array… Read More JavaScript – Map over two object arrays, match key, and store key and property as array
I am getting an error on my .map function. I believe the issue is greater than that though because sometimes my fetch comes back as undefined. I have been looking into solutions but haven’t found anything that has given me a solution. Props – is a logged-in user object that has the users ID discBag… Read More Having troubles with the .map funciton
I thought for sure this would have been asked before, I tried searching but feel free to point me in the right direction. So here’s the problem data, lets call it "data": [ { "Wetlands.WETLAND_TYPE": "Freshwater Forested/Shrub Wetland" }, { "Wetlands.WETLAND_TYPE": "Lake" }, { "Wetlands.WETLAND_TYPE": "Riverine" } ] JS: const myWetlands = data.map(({ Wetlands.WETLAND_TYPE })… Read More How do I use map() on an object array that has a periods in its object keys? Index notation doesn't work
I am trying to transform the data below from: { title: ‘The Promise’, blurb: ‘Lorem Ipsum’, cover_image: ‘Lorem Ipsum’, pub_year: 2002, genre: ‘Foobar’ } To: [ { col1: ‘The Promise’, col2: ‘Lorem Ipsum’, col3: ‘Lorem Ipsum’, col4: 2002 col5: ‘Foobar’ }, ] I have been puzzling away at this for quite a while and can… Read More Using .map() to iterate over an array of Object values and reassign to new keys
I have this function function getDaysArray(days: number): number[] { return […new Array(days)].map((_x, i) => { return i + 1; }); } which is supposed to return an array of days by month, so for example If I log getDaysArray(31) I expect to have an array like this [1,2,…,31] but instead, I am getting this: [empty… Read More Map returns Empty statement array