associative arrays in JavaScript

What will be the output of the JavaScript code?

What will be the output of the code below?
var abc = { x: 10 };
var result = (function () {
    delete abc.x;
    return abc.x;


Answers:- The output would be “undefined”. The delete operator is used to delete the property of an object.

Here “abc” is an object which has the property “x”. It's a “self-invoking” function and we will delete the x property from object “abc”. When you try to return a deleted property, it will return “undefined”.

I hope you are enjoying with this post! Please share with you friends. Thank you!!

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..

My Tech Blog -
My Books - Book 1 and Book 2 Powered by Blogger.