Modify the property value of a multi-tier nested object according to the given string

topic description

I store user information in localStorage userInfo, to encapsulate a method to modify userInfo

related codes

// userInfof
var userInfo= {
    id:"123",
    name:"Jim",
    info:{
        address:{
            home:"",
            work:{
               workDays:"",
               weekend:"",
               festival:""
            },
        },
        money:{
            balance:0,// 
            redPacket:0,// 
            integral:0,//             
        }
    }
}
// localStorage.userInfo.info.address.work.workDays
editFn("userInfo.info.address.work.workDays","");

// localStorage.userInfo.info.money.balance888
editFn("userInfo.info.money.balance","888");

what result do you expect?

how to write this editFn method?

Recursive javascript

Apr.11,2021


if (!(cur[key]))
                throw `${key} !`
 it doesn't make sense here. If you assign a nested property to a brand new object, it crashes directly. 
 modify it: 
if (!(cur[key])) {  
    try {  
        Object.defineProperty(cur, key, {value: {}, writable: true, configurable: true, enumerable: true});  
  } catch (e) {  
        console.error(e);  
  }  
}



Previous: Vue test error report
Next: Can webpack generate static HTML, reference dede system to generate static method?







Js Recursive Sum 1, 2, 2, 3, 1, 2, 3, 3, 2, 3, 3, 2, 3, 2, 3, 2, 1?
 js Recursive Sum 1, 2, 3, 3, 3, 3, 3, 3, 2, 1? ...


Recursive
javascript


Feb.27,2021




Ask for advice on how to write a js recursive function.

work needs to use a js recursive writing, really can not write it, ask for help, you can add Wechat to send a big red packet! The data structure of trustworthiness ~ is as follows:
[
{
key: 1 ,
name: name ,
label: ...


Recursive
javascript


Mar.12,2021




How does a recursive function return the correct value?

has the following recursive function, which cannot return the correct result:
const navItems = [
{
name: name1 ,
label: ,
items: [
{
name: name2 ,
label: ,
items:...


Recursive
javascript


Mar.13,2021




With regard to tail recursion, what is wrong with me? why is it that when the input is large, it will still overflow the stack?

as mentioned in the question, I use recursion to calculate the approximate value of PI: PI 4 = 1-1 PI 3 + 1 hand 7 + 1 hand 9 +; code is as follows:
let calPI = (n, sum = 1)=> {
if(n < 3)
return sum*4;
n%4 === 1 ? sum += 1 n...


Recursive
javascript


Mar.23,2021




PHP recursive tree structure function question?

function getTree ($data, $pId) {
$tree = ; -------------------1
foreach ($data as $k = > $v) { if ($v [ cate_ParentId ] = = $pId) { Father finds son
$v[ cate_ParentId ] = getTree($data, $v[ cate_Id ]); ---------------------2
...


Recursive
javascript
php


Apr.05,2021




How to use js recursion to get child node data down infinitely so as to get a new tree data?

existing data:
var res = [{
code: 1,
name: "",
children: [{
code: 1,
name: "",
children: [{
code: 1,
name: "",
children: [{
code: 1,
...


Recursive
javascript


Apr.09,2021




The Array.prototype.flat () method of the array, how to use tail recursion to achieve it?

The Array.prototype.flat () method can flatten the nested array into flattening into one-dimensional array , accept a number as several layers of expansion, and defaults to layer 1 . If you expand no matter how many layers are nested, you can pass...


Recursive
javascript


Sep.16,2021




Find the points in the plane that meet the conditions (coordinate points)?

problem description
The parameter is [number, distance] to find out the point coordinates satisfied in the two-bit plane of the browser.
number: the number of coordinate points in the two-bit plane of the browser.
distance: the distance between ea...


Recursive
javascript


Nov.19,2021






False


Django, Why does the system automatically generate an empty session? every time the request is made?


Use python to convert dict1 to dict2, in the example. I tried for a long time but couldn't find a solution.


How to self-start the php-fpm service when building a LNMP environment with docker?


Can an array in react state be bound to a dom state using an element in the array?


Wechat browser version 6.6.5 cannot prevent the springback of pull-up and drop-down to the top under ios system.


In express+hbs, how do you define the routed data as a variable on the page?


How to use symbol reference of Iconfont in dva


How to elegantly add data to JSON objects?


Using node to build video streaming server


The proportional width of the echarts graph is inconsistent.


React uses axios to call the background data. After success, how to jump to the page based on the returned value?


I don't understand what a linux command means. Please explain it.


Vue introduces multiple components in vue-router by nesting named views, and does not refresh the same reference in other pages.


Running nodejs reports fewer errors ")"



css
mysql
arrays
josn
react
html
typescript
webpack
npm
sass
R
objective-c
.net
sql-server
jquery
python-3.x
angularjs
django
angular
excel
regex
iphone
ajax
linux
xml
pandas
vba
spring
database
wordpress
string
wpf
xcode
windows
bash
postgresql
oracle
multithreading
eclipse
list
firebase
algorithm
macos
forms
image
scala
visual-studio
azure
bootstrap
spring-boot
react-native
python-2.7
docker
performance
function
winforms
matlab
powershell
apache
dataframe
api
sqlite
numpy
rest
shell
selenium
flutter
dart
maven
loops
qt
swing
android-studio
csv
express
file
class
tensorflow
sorting
codeigniter
perl



How does JavaScript do RSA encryption, decryption, signature and verification? Is there a useful library?


How does antd DatePicker change dates dynamically?


Use font-spider tarantula to compress the font to report an error < web font not found >


El-table data source: data= "tableData" changes dynamically, how to refresh the table in real time


Php how to merge arrays according to the same key value in the same array




© 2021 CodesHelper


Advertising
Contact us
About us


Menu