Pankaj Tanwar articles - 26 total
Challenge of day #21 - Split a String in Balanced Strings
Hello! It's day 21 of my coding diary. Yesterday, vercel was having some issues with their build...
Challenge of the day #20 - To Lower Case.
Hey-yo people! Welcome to yet another edition (day 20) of my coding diary. I am sure, you might be...
Challenge #19 - N-Repeated Element in Size 2N Array.
Howdy! This is day 19 of my coding diary and I am pretty excited to share today's challenge with you...
Challenge #18 - Count Negative Numbers in a Sorted Matrix
Hey-yo! Welcome to day #18 of my coding diary. It has been a great journey so far, a really good...
Challenge #17 - Sum of Unique Elements.
Helllllooooo! Pretty much excited about today's problem (No, 17 is not my lucky number.) Cool, let's...
Challenge #16 - Best Time to Buy and Sell Stock
Hello! I hope you had a lovely weekend. Here is my today's journal (btw it's day 16) of my coding...
Challenge #15 - Count Number of Pairs With Absolute Difference K
Bonjour! Thanks for sticking along, it's day 15 of my coding diary. Well, I started this journey to...
Prevent duplicate cron job running.
Today, while working on an in-house project, I encountered a really interesting problem. I needed a...
What is the sorting algorithm behind ORDER BY query in MySQL?
Since the last couple of weeks, I have been working on MySQL more closely. MySQL is a brilliant piece...
🎉 Launching Bestresources.co : Share & explore personal resources at one place!
Namaste 🙏 I am Pankaj, a self taught software developer passionate about exploring tech. Today, I...
What is latency? Let’s deep dive & understand possible ways to optimise it.
Hi 👋, Latency is yet another, a very important topic when we talk about backend engineering or...
Have you ever thought, how ‘nodemon’ works internally? Let’s build our own ‘nodemon’ in under 10 minutes!
Hey 👋, If you have ever worked with Node.Js, you must have used a package called nodemon for...
Do you know 0.1 + 0.2 ≠ 0.3 in JavaScript? Here is why!
Hey 👋, It’s been a while since I have been working with JavaScript. Yesterday, I experienced a very...
How to implement WhatsApp like End-to-end encryption?
This article was originally published by me at...
How does Github store millions of repo and billions of files?
This article was originally published at...
System design : How Instagram computes real-time trending hashtags ?
I am sure, you might have used Instagram and explored it's trending section. Instagram has built a...
How database indexing actually works internally?
Let's start with a simple example showing why you would need indexing in a database. Suppose we have...
Proxy vs Reverse Proxy - using a real life example!
I am sure, you must have heard of Proxy and reverse proxy server. This is a very important topic,...
System Design - How to design Google Drive / Dropbox (a cloud file storage service)
System design is one of the most important aspect of software engineering. System design problems are...
System Design : Is client side load balancing a good idea?
Load Balancer (LB) is another critical component of any distributed system. Before, directly diving...
How Twitter stores 500M tweets a day?
Twitter Usage Statistics 500MN tweets per day ~7000 tweets per second 8,00,000+ Queries per...
Generating unique IDs in a distributed environment at high scale.
Recently, I was working on an application which had a sharded database, required generating unique...
My journey - from python scripts to 20+ freelance full stack projects
Back in March 2017, I was about to complete one year of my Bachelor degree in Computer Science at NIT...
Explain the synchronous, callback, and async-await (promises) approach like I am 10🧒
My friend was moving to Surat, invited me to a party and some shopping. We went to a restaurant. It...
Explain microservices like I am 10 🧒.
I had a best friend👬 . We used to study together, party together and talk together. But one day, he...
Placement Portal Project during summer break!
My Final Project I built an online on-campus Placement & Internship automation web por...