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OAOlumide Adeolachasfatprojects.hashnode.dev2d ago · 17 min read

Foundations of Computer Programming: Understanding How Software, Hardware, and Programming Languages Work Together

What Is a Computer? At its most fundamental level, a computer is a machine that processes information. It takes input, performs operations on that input, and produces output. But this definition, whil

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DSDoogal Simpsondoogal.dev6d ago · 4 min read

How the Luhn Algorithm Validates Credit Cards Instantly

I use the Luhn algorithm to validate credit cards instantly on the client side without querying a bank. By doubling every second digit from the right and summing them, the browser checks if the final

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KPKamal Poudelkamalpoudel.hashnode.dev6d ago · 5 min read

Jack of All Trades, Master of None: Trying to Finally Choose a Direction

For a long time, I have felt like a “jack of all trades, master of none.” I have touched a lot of different technologies. C. C++. Java. Python. PHP. Laravel. .NET. HTML. CSS. React. Django. Data analy

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ARAditya Rajomegaabot.hashnode.devJul 21 · 4 min read

Day 1–2: My First Steps into Cybersecurity

I'm a final-year Computer Science student aiming for a SOC Analyst or Network Security Engineer role after graduation, and I'm logging the process of actually getting there. I missed posting yesterday

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DSDoogal Simpsondoogal.devJul 18 · 5 min read

A* Search Algorithm: Game Pathfinding Explained

Quick Answer: Video game characters use the A* (A-Star) search algorithm to navigate complex environments without getting stuck on walls. A* achieves this by calculating the most efficient route using

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JRJAY RASKARjayraskar.hashnode.devJun 28 · 3 min read

Where did the 8 bit came from?

We measure the physical world in base-10. Kilometers, kilograms, kilovolts—everything scales by tens. It’s a habit we picked up simply because we have ten fingers, and it forms the backbone of how we

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DSDoogal Simpsondoogal.devJun 26 · 5 min read

How Merkle Trees Verify Large Files

Quick Answer: To verify massive files from untrusted sources, I use a Merkle tree. This cryptographic data structure chops the file into manageable chunks, hashes each one, and pairs them recursively

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MGMoksh Guptamoksh45.hashnode.devJun 25 · 5 min read

From Text to Morse Code - How Optical Signals Carry Information

Morse code is one of the oldest encoding systems still worth understanding today. It predates modern networking by over a century, yet it maps directly onto the same core ideas - binary states, serial

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DSDoogal Simpsondoogal.devJun 23 · 6 min read

Merkle Trees Explained: How We Verify Large Files

Quick Answer: A Merkle tree is a data structure used to quickly verify the integrity of massive files downloaded from untrusted sources. By chopping a file into smaller chunks, hashing them in pairs,

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DSDoogal Simpsondoogal.devJun 23 · 4 min read

How to Represent Money in Software

Quick Answer: Never use floating-point numbers to represent money in software. Because floating-point math cannot perfectly represent base-10 decimals, it introduces microscopic inaccuracies that comp

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#computerscience

Explore Hashnode

Trending tags this week

Foundations of Computer Programming: Understanding How Software, Hardware, and Programming Languages Work Together

How the Luhn Algorithm Validates Credit Cards Instantly

Jack of All Trades, Master of None: Trying to Finally Choose a Direction

Day 1–2: My First Steps into Cybersecurity

A* Search Algorithm: Game Pathfinding Explained

Where did the 8 bit came from?

How Merkle Trees Verify Large Files

From Text to Morse Code - How Optical Signals Carry Information

Merkle Trees Explained: How We Verify Large Files

How to Represent Money in Software