HTML, CSS, and JavaScript: A Practical Beginner's Guide to Building Webpages

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A new beginner's guide outlines how every website is built on three core technologies: HTML, CSS, and JavaScript. HTML defines a page's structure using tags and elements, while CSS handles visual styling such as colors, fonts, and layout. JavaScript adds interactivity and logic on top of the static foundation. The guide walks learners through each technology individually before combining them in a hands-on project — a personal task tracker. Only a free text editor like VS Code and a web browser are needed to follow along.

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Engineer Builds Hybrid Agentic RAG System Combining FAISS and BM25 for Smarter LLM Retrieval

A developer has designed and documented an Agentic Hybrid Retrieval-Augmented Generation (RAG) architecture that merges dense semantic search via FAISS with exact keyword matching using BM25, aiming to overcome limitations of traditional static RAG pipelines. The system uses an autonomous LLM agent built on the smolagents framework, enabling dynamic decision-making about when and how to retrieve information. During development, the engineer encountered significant challenges running the model locally on CPU, including import errors, latency exceeding 213 seconds per step, and model hallucinations. These issues were resolved by switching to a cloud-hosted model, Qwen2.5-72B-Instruct, and applying dynamic score normalization with a weighted fusion parameter. The research also outlines a future roadmap for scaling the architecture toward knowledge graphs, multi-agent consensus systems, and automated valuation frameworks.

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ProgrammingDEV Community ·

How to Structure Figma Variables for Scalable UI Design Systems

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ProgrammingDEV Community ·

Semantic vs. Prompt Caching: Finding the Cost Break-Even Point for LLM Apps

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ProgrammingDEV Community ·

How to Use Dart and Flutter Built-in Formatter, Analyzer, and Linter Tools

Dart and Flutter come with built-in tools for formatting, analyzing, and auto-fixing code without any additional installation. The `dart format` command applies style formatting, while `dart analyze` scans for potential code issues; Flutter offers equivalent commands with slightly different output. Developers can use `dart fix` to automatically resolve flagged problems, though caution is advised when applying bulk auto-fixes. Since Dart and Flutter lack native support for command aliases via pubspec.yaml, a Makefile can be used to bundle recurring tasks like formatting, analysis, and testing. A Git pre-commit hook can also be configured to automatically run these checks before every commit, helping maintain code quality consistently.

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