📰 Dev.to · jacobjerryarackal

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PCA (Principal Component Analysis): Finding the Hidden Structure in High‑Dimensional Data

Dev.to · jacobjerryarackal 3w ago

PCA (Principal Component Analysis): Finding the Hidden Structure in High‑Dimensional Data

1. The Problem It Solves Imagine you have a dataset with 100 features, for example, pixel...

XGBoost: When Gradient Boosting Meets Regularization

Dev.to · jacobjerryarackal 4w ago

XGBoost: When Gradient Boosting Meets Regularization

1. The Problem It Solves Imagine you’re a loan officer at a bank. You have thousands of...

Why “Just Prompting” Fails on Private Data: A RAG Post‑Mortem

Dev.to · jacobjerryarackal 1mo ago

Why “Just Prompting” Fails on Private Data: A RAG Post‑Mortem

The Problem You have a 400‑page internal handbook includes compliance rules, HR policies,...

I Built a RAG Pipeline. Then I Realized Retrieval Is the Real Model

Dev.to · jacobjerryarackal 2mo ago

I Built a RAG Pipeline. Then I Realized Retrieval Is the Real Model

Everyone talks about the LLM. GPT‑4, Claude, Gemini – that’s the celebrity. But after building my...

“Prompt Engineering Is Enough” Is Wrong – Here’s What I Had to Add

Dev.to · jacobjerryarackal 2mo ago

“Prompt Engineering Is Enough” Is Wrong – Here’s What I Had to Add

I used to believe the hype. I thought if I just wrote better prompts clearer instructions, few‑shot...