Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
Learn Regex From Scratch: Master Text Processing in 30 Minutes
A beginner-friendly regex tutorial covering basic syntax to advanced lookahead assertions, with practical recipes and online testing tools.
Redis Distributed Lock in Practice: 5 Implementation Patterns from Redlock to Production-Grade Lock Service
From SET NX EX to Redisson, Redlock algorithm to lock renewal, fairness, deadlock prevention with Lua scripts for production-grade distributed concurrency control
Redis High Availability Cluster: A Practical Guide
From standalone to sentinel to cluster — master Redis HA architecture deployment, data migration, caching strategies, and production operations
React Server Components in Practice: RSC Architecture on the ToolsKu Site
Rendering model, Server vs Client boundaries, data fetching—and how ToolsKu uses Next.js App Router RSC for near-zero-JS first paint.
React 19 New Features Complete Guide: Actions, use(), Server Components, and Compiler Optimizations
An in-depth look at React 19's core new features, including Form Actions, the use() Hook, improved Server Components, React Compiler auto-optimizations, and migration considerations.
React Native New Architecture: 5 Core Patterns for Fabric Renderer and TurboModules
From Fabric rendering pipeline to TurboModules JSI bridging, covering complete production-grade React Native new architecture migration
React Server Components in Practice: Next-Gen React Architecture
From RSC core principles to production-grade practice: Server vs Client components comparison, use client/use server directives, data fetching patterns (no more useEffect), Streaming + Suspense, Next.js App Router, Server Actions, caching strategies (revalidate/ISR), performance comparison, migration guide, SEO optimization, with complete code examples.
React Concurrent Rendering in Practice: The Right Way to Use useTransition, useDeferredValue, and Suspense
A deep dive into the core APIs of React concurrent rendering—the principles and practical usage of useTransition, useDeferredValue, and Suspense. Covers large list filtering, async data loading, streaming SSR, priority scheduling, and common performance pitfalls with mitigation strategies.
12 Business Uses for QR Codes: From Payments to Analytics
QR codes go beyond payments. Explore 12 real business applications with tracking tips, design guidance, and practical examples.
The Complete Production Guide to RAG in 2026: Retrieval-Augmented Generation from Theory to Practice for Enterprise Knowledge AI
A comprehensive guide to designing and implementing RAG systems in 2026, covering architecture principles, vector database selection, embedding strategies, chunking optimization, hybrid retrieval, and production deployment best practices.
Python uv Package Manager 2026: The 10x Faster pip Replacement Guide
A comprehensive guide to Python uv package manager: ultra-fast dependency resolution, virtual environment management, migration from pip/poetry, Monorepo workspaces, CI/Docker integration, common pitfalls, troubleshooting, and tool comparison.
Python Web Scraping Guide: Legal, Reliable, and Maintainable Data Collection
A practical guide to Python web scraping that focuses on compliance, stable parsers, polite rate limits, Scrapy pipelines, Playwright for dynamic pages, and production monitoring.
RAG Deep Dive: From Naive RAG to Agentic RAG — Three Generations of Evolution and Enterprise Implementation
An in-depth analysis of the three-generation evolution of Retrieval-Augmented Generation, covering Embedding model selection, vector database comparison, hybrid retrieval with RRF fusion, document chunking strategies, Agentic RAG multi-turn retrieval, multimodal RAG, and quantitative evaluation frameworks with complete Java implementations.
Python RAG with Knowledge Graph: 6 Core Patterns for Production GraphRAG
From entity-relation extraction to graph-vector hybrid retrieval — 6 production-grade GraphRAG implementation patterns covering Neo4j graph storage, community detection summarization, graph traversal augmentation, and end-to-end pipelines
Python SSE Streaming LLM Output: 5 Implementation Patterns from Server-Sent Events to Real-time Chat
From SSE protocol principles to FastAPI/Flask streaming implementation, LLM streaming output to error recovery and backpressure control
Python RAG Performance Poor? 2026 RAGAS Evaluation + 6 Optimization Strategies to Boost Accuracy by 40%
From RAGAS evaluation framework to chunk optimization, retrieval reranking, hybrid search, and query rewriting, 6 RAG optimization strategies to boost accuracy by 40%
Python RAG Hybrid Search: 5 Core Strategies to Boost Retrieval Accuracy by 40%
From vector retrieval to BM25 keyword search, RRF fusion to Cross-Encoder reranking—complete production guide to RAG hybrid search
Python Pytest Async Testing: Complete Guide to pytest-asyncio 2026
A comprehensive guide to Python async testing with pytest-asyncio: configuration and patterns, async fixture dependency injection, mocking async functions and external APIs, testing async context managers and generators, parameterized async tests, common pitfalls and error troubleshooting, production-grade async test suite best practices.
Python RAG Application Development: From Principles to Production
A deep dive into RAG (Retrieval-Augmented Generation) core principles, vector embeddings, chunking strategies, vector database selection, retrieval optimization, and production deployment with complete Python code examples.
Pydantic AI Agent Development in Practice: 5 Core Patterns for Type-Safe Production AI Applications
From dependency injection to structured output, tool registration to streaming responses — a complete guide to Pydantic AI Agent development