Harshit hatwal

Likes to explore life. And learning new things.

[Rohan Das @rohaninvestor]

I'll teach you about Equity, ROCE, ROE, D/E, EBITDA, EBIT, Profit Margin & Free cash flow through Meera's Bakery example.

I'll explain it in a way that even kids can understand:

Please bookmark & read till the end 📌

[Harshit hatwal @HatwalHarshit]

@PandaGallery_ https://t.co/ukoDcGSqE1 😂

[Harshit hatwal @HatwalHarshit]

@tosha_patel30 I am also in final year let's connect

[IET Lucknow Alumni Association @iethub]

IETLAA strongly opposes the proposal of merger of IET college LKO with AKTU. Please sign this petition to show support https://t.co/egngjqgYZS

[IET Lucknow Alumni Association @iethub]

We are requesting all alumni and students to unite to #saveIET
Two things are required:
- Please retweet and comment to spread awareness
- Please sign the change. org petition below
https://t.co/mdAdiidSFi

[Harshit hatwal @HatwalHarshit]

@LearnWithBishal ❤️

[Saurabh Kumar @drummatick]

As a fresher the greatest skill you can have is being good at asynchronous programming.

It took me a while to understand it completely. When I started I thought yeah “async await” that’s all I need to know. But only after a while I realized that asynchronous programming is much more than that.

Firstly, asynchronous programming is about understanding the event loop, which is fundamental in languages like JavaScript.

The event loop handles all asynchronous callbacks in the program. Knowing how it works helps you avoid common pitfalls like blocking the main thread.

Secondly, mastering concurrency control is crucial. This involves understanding promises and their states (completed, rejected, pending), and how to handle these promises with methods like .then(), .catchError(), and .whenComplete() .

This becomes essential when dealing with multiple asynchronous operations that need to be coordinated or executed in a particular order.

Thirdly, error handling in asynchronous programming is different and often more complex. You need to be adept at catching and handling errors in promises and async functions.

Understanding try/catch blocks within async functions and handling rejected promises is key to building robust applications.

[Aanshul Sadaria @AanshulSadaria]

If you are a computer science student, you would know the difference between TCP and UDP! But do you know which protocol is used to transfer packets in a live stream platform? 🤔

(bookmark and retweet this to share it with your friends and as a goodwill gesture to me ❤️)

Before we go into that part, let us understand the difference between TCP and UDP!

TCP is reliable (no loss of packets, ordered, etc.), but transfers data slowly. On the other hand, UDP is fast and simple but not as reliable as TCP. That's it? That's the only difference? NO. But this is sufficient to understand the rest of the post. 🙄

On a live streaming platform, we want to watch Virat Kohli hit the century in real-time. It would be no fun if we learn about his 50th ODI century by the loud cheer in the neighborhood. 🤣

We want to receive packets fast, in a fairly reliable way! (There is always a tradeoff. In software engineering, you can't have both pieces of cake.)

RTMP stands for real-time messaging protocol. Live stream files are huge; what RTMP does is break the data into smaller chunks, send it over the network and assemble it on the viewer's system.

Before creating the chunks, the data needs to be encoded to preserve the bandwidth. This is one of the crucial factors which enables lower latency for RTMP. 💯

Now, RTMP is written over TCP which means there is a continuous connection and no data loss (take it with a pinch of salt in real world).

Now, there is another protocol - RTSP (real-time streaming protocol)! Can this be used for live streaming? Theoretically, yes. But it isn't widely used. 😓

RTSP has even lower latency compared to RTMP. This means that RTSP can be widely used for localised live streams and uses both TCP and UDP (TCP for issuing control commands like play, pause, record and UDP for delivery of packets). 🧠

So, one would find RTSP more widely used in usecase like CCTV camera and RTMP for streaming over the web. 😮

But RTMP isn't the only protocol used for live streaming on Disney+ Hotstar, ESPN, Netflix, Prime Video & Amazon Studios, and much more. I could write more about the entire process of data transfer but that would be spoonfeeding. 🤐

I keep sharing such small technical bytes to increase curiosity among people about systems we use in our daily life. 🤗

Keep following @AanshulSadaria for more such tech content. 😉 ✨

#technology #streaming #protocols #SoftwareEngineering

[Rehmat @faster7861]

ReactJS useState hook mistake!

What will be value of count on first click?
1) 1
2) 3
3) 0

[Harshit hatwal @HatwalHarshit]

@Singh1Aryan 👍

[Harshit hatwal @HatwalHarshit]

@LauryMeredith Looking for someone to learn and build things

[Harshit hatwal @HatwalHarshit]

@codedamncom I'm in

[codedamn @codedamncom]

📢 Aspiring frontend devs, there are less than 100 days left for 2024. This is the best chance to polish your coding skills.

We've curated the perfect challenge for you. Master frontend web development by solving 1 challenge everyday 🔥

RT & comment to get the link

Who's in?

[Aina Sanghi @ainasanghi]

React Interview Question's Answer:

1. What is React, why is it used in web development and how does it differ from other JavaScript libraries or frameworks?

- What is React?

React is an open-source JavaScript library for building user interfaces, particularly for web applications.
It was developed and is maintained by Facebook. React is widely used in web development for several compelling reasons.

- Why it is used in Web development?

First and foremost, React excels at building complex user interfaces efficiently.
It employs a Virtual DOM (Document Object Model), which is an in-memory representation of the actual DOM. When data changes in a React application, React first updates the Virtual DOM, compares it with the real DOM, and then makes the minimum necessary updates to the actual DOM.
This approach significantly improves performance by reducing unnecessary DOM manipulation, making React one of the fastest libraries for rendering UI components.

Second, React promotes a component-based architecture. Developers can break down user interfaces into reusable and self-contained components.
This not only encourages code reusability but also makes it easier to manage and maintain large-scale applications. Components can be composed together to create complex UIs, which is a fundamental aspect of React's design.

Furthermore, React's unidirectional data flow simplifies application state management. It uses a concept called 'props' (short for properties) for passing data from parent to child components, and 'state' to manage local component data. This clear data flow makes it easier to reason about how data changes affect the UI, leading to predictable and maintainable code.

React's extensive ecosystem, including tools like React Router for routing and Redux for state management, simplifies building full-fledged web applications. It also boasts a vibrant community and a vast array of third-party libraries and components, making it a popular choice among developers.

- How it differ from other JavaScript libraries or frameworks?

Compared to other JavaScript libraries or frameworks, React stands out for its flexibility and a 'learn once, write anywhere' philosophy. It can be integrated into existing projects, even those built with other libraries or frameworks, thanks to its component-based nature and robust ecosystem.

- Conclusion:

In summary, React is a powerful tool for web development due to its performance optimizations, component-based architecture, and clear data flow. It differentiates itself by focusing on building user interfaces efficiently and can be seamlessly integrated into various tech stacks, making it a versatile choice for modern web development.

[Harshit hatwal @HatwalHarshit]

@Singh1Aryan 👍

[Swapna Kumar Panda @swapnakpanda]

I mentored an engineering student. In just 3 months, he bagged a remote job offer of $40K for a Junior Full-Stack Web Developer role.

This is a 20-point roadmap I prepared for him:

[Harshit hatwal @HatwalHarshit]

@shivarapolu01 Sql

[ISRO @isro]

LVM3 M4/Chandrayaan-3 Mission:
LVM3 M4 vehicle🚀 successfully launched Chandrayaan-3🛰️ into orbit.

[Harshit hatwal @HatwalHarshit]

@TheSuranaverse Interested

[Harshit hatwal @HatwalHarshit]

@suparnojit26 I am also looking for a team if any team has vacancy pls include me🙂