Monday, May 2, 2022
Instead of testing to see if a property exists in the object you could just use the for/in loop to iterate through all the enumerable properties in the object. Enumerable properties are the properties that owned by the object. In JavaScript there are always two objects that are created with each object, one hidden object that's always there is the prototype object. It's like the blueprint for the object you just created. The owned properties are the properties that explicitly created with your object. The prototype properties are what's called inherited properties. So if we use the for/in loop we will get the owned properties and the prototype properties.
So to use the for/in loop to iterate through the object let's use our product object again.
Now type in the following to loop through the object with the for/in loop and outputs the property name and property value to the console
As you can see we only got through the first level of the properties, since supplier is nested object how do we get the properties for it? You would think it's as easy as changing the code to have nested for/in loop would do the trick.
Like this
But as you can see that's not the case, instead you get the characters of the property names. As you can see the supplier property is actually an object itself.
So to use the for/in loop to iterate through the object let's use our product object again.
var product = new Object();product.name = "Chai";product.category = "Tea";product.country = "India";product.supplier = {name: "ACME Tea Of India",location: "New Delhi"};
Now type in the following to loop through the object with the for/in loop and outputs the property name and property value to the console
for (prop in product)console.log(prop + ": " + product[prop]);
As you can see we only got through the first level of the properties, since supplier is nested object how do we get the properties for it? You would think it's as easy as changing the code to have nested for/in loop would do the trick.
Like this
for(prop in product)
{
console.log(prop + ": " + product[prop]);
for(p in prop)
console.log(p + ": " + prop[p]);
}
But as you can see that's not the case, instead you get the characters of the property names. As you can see the supplier property is actually an object itself.
Subscribe to:
Post Comments (Atom)
Search This Blog
Tags
Web Development
Linux
Javascript
DATA
CentOS
ASPNET
SQL Server
Cloud Computing
ASP.NET Core
ASP.NET MVC
SQL
Virtualization
AWS
Database
ADO.NET
AngularJS
C#
CSS
EC2
Iaas
System Administrator
Azure
Computer Programming
JQuery
Coding
ASP.NET MVC 5
Entity Framework Core
Web Design
Infrastructure
Networking
Visual Studio
Errors
T-SQL
Ubuntu
Stored Procedures
ACME Bank
Bootstrap
Computer Networking
Entity Framework
Load Balancer
MongoDB
NoSQL
Node.js
Oracle
VirtualBox
Container
Docker
Fedora
Java
Source Control
git
ExpressJS
MySQL
NuGet
Blogger
Blogging
Bower.js
Data Science
JSON
JavaEE
Web Api
DBMS
HTML5
MVC
SPA
Storage
github
AJAX
Big Data
Design Pattern
DevOps
Eclipse IDE
Elastic IP
GIMP
Graphics Design
Heroku
Postman
R
SSL
Security
Visual Studio Code
ASP.NET MVC 4
CLI
Linux Commands
Powershell
Python
Server
Subnets
Telerik
VPC
Windows Server 2016
angular-seed
font-awesome
log4net
servlets
tomcat
AWS CloudWatch
Active Directory
Angular
Blockchain
Collections
Compatibility
Cryptocurrency
DIgital Life
DNS
Downloads
Google Blogger
Google Chrome
Google Fonts
Hadoop
IAM
KnockoutJS
LINQ
Linux Performance
Logging
Mobile-First
Open Source
Prototype
R Programming
Responsive
Route 53
S3
SELinux
Software
Software Development
Unix
View
Web Forms
WildFly
XML
cshtml
githu
Thank you so much for sharing this thread with us, It's a good post..keep posting and updating the more information like this. By the way, I am a professional javascript academic writer and provide Assignment help services to the students in Australia.
ReplyDelete
ReplyDeleteThis is a nice article for sharing great information. Thank you for providing such a wonderful and educative update. I would appreciate it if you could keep sharing.- what is skyline university cut off mark
pgslot มาแรง ไม่แพ้ ลิเวอร์พูล เพราะเว็บของเรานั้นก็กำลัง ขับเคลื่อนเปรียบเสมือนเครื่องจักรที่กำลังมาแรงที่สุดเพราะเว็บ pg-slot.game ของเรานั้นกำลังนำเสนอเกมให้ทุกท่านที่เข้ามาได้รู้จัก
ReplyDeleteThanks for sharing informative post. Digital Marketing Institute in Jammu where you can explore many thing about digital marketing.
ReplyDeleteสล็อต ไม่มี ขั้น ต่ำ แน่ๆว่าจุดเด่นของกิจกรรมนี้เป็นพวกเราไม่ต้องฝากเงินก่อน PG SLOT แม้กระนั้นก็ยังมีเครดิตสูงซึ่งพอเพียงต่อการพนันได้ทุกชนิด แล้วทางเว็บ สล็อต เติมวอเลท
ReplyDeleteslot games สมาชิกใหม่ ต้นแบบ การพนันสามมิติที่ช่วยเปิดมิติใหม่ของการเล่นสล็อต แกล้งมีประสบการณ์การเล่นสล็อตที่ละเอียด ล้ำยุค พร้อมเอฟเฟกต์เสียงสุดตื่นเต้นแล้วก็แอนิเมชั่น PGSLOT
ReplyDelete