Variables we declare in javascript with the help of const, are not purely constant. Let's say that if we have a variable called config with a bunch of properties and if we print it to the console you will see it has a name and a database object.

const config = {
name: "module-account",
database: {
host: "",
port: "2020",
username: "admin",
password: "r@@t",
console.log(config); // {"name":"module-account","database":{"host":"","port":"2020","username":"admin","password":"r@@t"}}

But if we update the value of let’s say name to be xyz, you will see you can do that. Although it's a constant. = "xyz";console.log(;   // xyz


Handling asynchronous tasks in web development is very common. One way to handle this is through promises.

Let’s say that we have the following code in that we are running multiple print commands

console.log('step 1'); 
console.log('step 2');
console.log('step 3');
console.log('step 4');
console.log('step 5');
console.log('step 6');
console.log('step 7');
console.log('step 8');

The way the javascript interpreter works is that it runs the code line by line. And in the above example if any of the steps is taking an abnormal amount of time then javascript will wait for that step to finish before moving on to the next step. …

In javascript, a variable may store two types of values: primitive and reference. So before we discuss them let’s first discuss two important concepts stack and heap.


In layman’s terms, a stack is a pile of objects. In computing, architecture stacks are basically regions of memory where data is added or removed in a last in first out manner (LIFO).


In layman’s terms, a heap is an untidy collection of things piled up haphazardly. In computing, architecture heap is an area of dynamically-allocated memory that is managed automatically by the operating system

In my last company, we were having more than 70 small APIs and we were using MongoDB heavily. Apart from having ELK stack, we also had database level logging for all the incoming requests to some of the endpoints to track the requests and responses.

A few months ago, we were struck with a disaster, because of something foolish that was missed in the code reviews. One night we did a deployment and after doing the sanity checks on production, considering everything is fine, we all went home thinking that all is good.

After a few hours, I got a…

Bus factor refers to the number of people in your team who can put your project in trouble if they are hit by a bus. And of course, the don’t have to be necessarily hit by a bus: illness, vacation, and departure from the company are all frequent occurrences that can bring disaster to a project. Each project manager should be aware of the bus factor of their teams. The most threatening bus factor that any team can have is 1; having a larger bus factor value is preferable.

The bus won’t care if you are the only developer!

In order for projects to keep going smoothly, efforts should be…

Roadmap to becoming a Backend Developer in 2020

Update for 2020

This roadmap has been updated for 2020, please have a look at

Web development today is completely different from what it was a few years ago; there are lots of different things that can easily baffle anyone entering into the web development. It was one of the reasons that we decided to make these step by step visual guides demonstrating the bigger picture and to give anyone a clear idea about what they have to follow to be in certain roles in web development.

About a week ago, we had a post titled Learn to become a Frontend Developer

Sublime has highly customizable build systems that can add to your productivity if you learn how to use them to your advantage. You can define one for your project and whenever you are editing any file, you can run certain commands on the source file and see the output in the sublime console, without leaving the editor.

I mostly use IntelliJ for development but still find myself switching to sublime text time to time, depending upon the nature of the project. I mainly use sublime when I have to write some small script or a library, and when I use…

Adnan Ahmed

Lead engineer @ tradeling. Lover of all things web, ponderer of new tech, fanatic of simplicity, OSS enthusiast

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