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DSDoogal Simpsondoogal.devMar 18 · 4 min read

Why Your Database Hates COUNT(DISTINCT) and Why HyperLogLog is the Cure

TL;DR: HyperLogLog (HLL) is a probabilistic data structure that estimates unique counts by analyzing the bit patterns of hashed IDs. Instead of storing every user ID, it tracks the maximum number of l

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VVaishnavigovidivenivici.comDec 14, 2025 · 4 min read

Reduce LLM Hallucinations and make it more grounded: Build Your First RAG System in Python (Beginner Friendly)

Why does ChatGPT sound confident even when it is wrong?More importantly, how do we fix that? In this blog, you will build your first Retrieval-Augmented Generation (RAG) system in Python, step by step, with real code and no machine learning backgroun...

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NKNiranjan Kumarscalable.hashnode.devNov 19, 2025 · 2 min read

Database Concepts for Modern System Design

Why do we need databases? Or even storage? Suppose you are ordering a book from an e-commerce platform. You open the app, search for the book, and the system must fetch that information instantly. This means the application needs a place to store pro...

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BGbuddha gautamblog.buddhag.com.npJun 7, 2025 · 5 min read

Python Descriptors: How @property and @property.setter work

This blog is generated as a usecase of this other blog(Automating blog creation with own agent vs mcp) that helped me automate the writing of this blog. Alright, settle in, folks. Today we're diving into Python descriptors. Not because some LinkedIn...

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HHarshavardhananblog.pragmaticbyharsh.comApr 8, 2025 · 7 min read

Moms are Hashmapping Geniuses - Part 2: Rehashing, Load Factor and an Ever Expanding Kitchen

A Continuation of the Journey Now that I had a pretty solid mental model of how HashMap works — and how my mom had been resolving collisions in God Mode all along — something else started to bug me. Sure, collisions were clever. Linear probing, chain...

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Trending tags this week

Why Your Database Hates COUNT(DISTINCT) and Why HyperLogLog is the Cure

Reduce LLM Hallucinations and make it more grounded: Build Your First RAG System in Python (Beginner Friendly)

Database Concepts for Modern System Design

Python Descriptors: How @property and @property.setter work

Moms are Hashmapping Geniuses - Part 2: Rehashing, Load Factor and an Ever Expanding Kitchen