Forem: Nitin Ahirwal

LeetCode Challenge Day 9 — 166. Fraction to Recurring Decimal

Nitin Ahirwal — Wed, 24 Sep 2025 14:11:39 +0000

Hey everyone 👋

Day 9 of my LeetCode streak! Today wasn’t the smoothest — I was working from a café instead of my desk ☕, so no video walkthrough this time. But the streak must go on 💪.

📝 Problem Summary

We’re dividing two integers and returning the result as a string.

If the decimal terminates → just return it.

If the decimal repeats → wrap the repeating digits in parentheses 🔄.

Examples:

1/2 → "0.5"

2/1 → "2"

4/333 → "0.(012)"

💡 Key Insight

When doing long division, a repeating remainder means the digits will start repeating too.
So, track remainders in a map and insert parentheses once a cycle is detected.

I’ve covered the full intuition, step-by-step approach, edge cases, and JavaScript code on my blog 👇
🔗 https://nitinahirwal.in/posts/166-FractiontoRecurringDecimal

Day 9 done ✅ — excited for Day 10 tomorrow 🚀

LeetCode #100DaysOfCode #JavaScript #ProblemSolving

LeetCode Day 8 — Compare Version Numbers (165)

Nitin Ahirwal — Tue, 23 Sep 2025 10:45:59 +0000

Day 8 of my LeetCode streak 🚀

Today’s problem was 165. Compare Version Numbers — a neat string parsing challenge where the tricky part isn’t the logic itself, but handling all the little details:

Ignoring leading zeros ("01" = "001")
Treating missing revisions as 0 ("1.0" = "1.0.0")
Comparing uneven revision lengths

I solved it in JavaScript by splitting the version strings into arrays, comparing each part as integers, and defaulting to 0 when one version runs out of parts.

Even on a distracted day (hello, Twitter doomscrolling 😅), keeping the streak alive matters.

👉 Full breakdown with code and reflections on my blog:
https://nitinahirwal.in/posts/165-CompareVersionNumbers

On to Day 9! 🚀

LeetCode #JavaScript #100DaysOfCode

🚀 Day 7 of My LeetCode Challenge — 3005. Count Elements With Maximum Frequency

Nitin Ahirwal — Mon, 22 Sep 2025 11:42:07 +0000

Today’s problem: LeetCode 3005 — Count Elements With Maximum Frequency 🔢

Task: Find the max frequency in an array and count how many elements belong to it.

Approach:

Use a Map to count frequencies

Find the maximum frequency

Sum all counts equal to that maximum

⚡ Time Complexity: O(n)
💾 Space Complexity: O(k)

👉 Full write-up with code + video walkthrough:
[https://nitinahirwal.in/posts/3005-CountElementsWithMaximumFrequency]

🎥 Walkthrough video: [https://youtu.be/qyptT7sp_gg]

LeetCode #JavaScript #100DaysOfCode #HashMap

Just dropped a new blog on Mastering Codex CLI: A Complete Guide to Streamlining Your Development Workflow!

Nitin Ahirwal — Thu, 17 Apr 2025 13:43:56 +0000

Codex CLI is an AI-powered command-line tool that’s a must-have for developers looking to code smarter. It turns natural language into executable code, automates repetitive tasks, and even explains complex codebases—all from your terminal.

In this post, I cover:
Key features: Natural language coding, multimodal inputs, secure automation, and more

Easy installation steps and essential commands to get started

How Codex CLI saves time, boosts productivity, and cuts errors

Ready to level up your dev game? Dive into the full guide and start using Codex CLI today!

Read it here: https://nitinahirwal.in/posts/CodexCLI

Let’s discuss your favorite CLI tools or how you’re using AI in your workflow!

🚀 Starting My 90-Day Journey: #Code90 – A Full-Stack Dev, DevOps, and Web3 Exploration

Nitin Ahirwal — Tue, 15 Apr 2025 14:51:36 +0000

After 7+ years in the web development industry, I’m diving even deeper into full-stack development, DevOps, Web3, and more.

I’m excited to share my new personal project: #Code90 – a 90-day journey where I’ll be revisiting everything I’ve learned (and relearned) throughout my career. This project will be a mix of:

Web Development (MERN Stack, APIs, UI/UX)

DevOps (Docker, CI/CD, Cloud Infrastructure)

Web3 (Smart Contracts, Solana)

System Design & Project Walkthroughs

Every day, I’ll be documenting my learning process, building projects, and sharing real-world challenges. This is an open-source, public learning experience, where I aim to:

✅ Relearn and master new concepts
✅ Build projects and share them with the community
✅ Tackle real-world problems in web development, deployment, scaling, and optimization

This is for anyone looking to stay up-to-date with the latest in tech, full-stack development, DevOps, or Web3. I’d love for you to follow along, contribute, or simply get inspired by the journey!

🔗 You can follow along here: https://nitinahirwal.in/posts/Code-90

Let’s explore, build, and learn together!

React Server Components: A Game-Changer for Web Development

Nitin Ahirwal — Sat, 12 Apr 2025 15:01:11 +0000

Hey devs! 👋
I just published a deep dive into React Server Components and how they’re transforming the way we build fast, scalable React apps — especially with Next.js! ⚛️🚀

Covered in detail:

✅ Say goodbye to useEffect headaches
✅ Cleaner architecture with Server & Client Components
✅ Improved performance & faster load times
✅ Built-in SEO benefits
✅ Real-world examples & tips

Give it a read and let me know your thoughts on RSC! 🔥
👉https://nitinahirwal.in/posts/React-Server-Components

Understanding Caching in Next.js – Make Your Apps Lightning Fast 🚀

Nitin Ahirwal — Fri, 04 Apr 2025 05:44:04 +0000

Hey devs! 👋
I just published a deep dive into Next.js Caching strategies and how you can leverage them to build faster, scalable, and highly efficient web apps! 💡

Covered in detail:

Static vs Dynamic Caching

CDN & Cache-Control headers

ISR & SSR with examples

Route Handlers & API Caching

Real-world optimization tips

Give it a read and let me know your caching tricks! 🚀
👉https://nitinahirwal.in/posts/Next.js-Caching

Understanding Short Circuiting in Programming

Nitin Ahirwal — Wed, 02 Apr 2025 19:10:15 +0000

Boolean logic plays a crucial role in programming, influencing decision-making, control flow, and performance. One powerful optimization technique is short circuiting, which helps skip unnecessary computations and makes code execution more efficient.

In my latest post, I cover:
✅ What short circuiting is
✅ Why it’s useful for optimization
✅ How to apply it in JavaScript & React
✅ Practical examples to improve your code

🔗 Read more here: https://nitinahirwal.in/posts/Short-Circuiting

Have you used short circuiting in your projects? Share your thoughts below! 👇💡