- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Object comparison Complexity in JavaScript using comparison operator or JSON.stringlify()?
Let’s say the following are our objects −
var object1 = { firstName: "David" }; var object2 = { firstName: "David" };
You will not get the correct result using comparison operator (== or ===). Use JSON.stringify() for this.
Example
Following is the code implementing both the ways and showing the correct result −
var object1 = { firstName: "David" }; var object2 = { firstName: "David" }; if (object1 == object2) console.log("using == operator result ==> true"); else console.log("using == operator result ==> false"); if (JSON.stringify(object1) == JSON.stringify(object2)) console.log("using JSON.stringify() operator result ==> true"); else console.log("using JSON.stringify() operator result ==> false");
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo224.js.
Output
The output is as follows −
PS C:\Users\Amit\JavaScript-code> node demo224.js using == operator result ==> false using JSON.stringify() operator result ==> true
Advertisements