Practical guides, tools, and fixes for software developers

Hono.js Tutorial: REST API with Zod, JWT & Cloudflare Workers

Step-by-step Hono.js tutorial: routing, middleware, Zod validation, JWT auth, and deployment to Cloudflare Workers and Node.js. Working code throughout.

TypeScript 7 Migration Guide: tsgo, Breaking Changes, Build Times

Migrate to TypeScript 7 (tsgo): install the beta, fix the 4 breaking changes, update tsconfig, and decide if upgrading now is worth it.

50 Cloud & DevOps Interview Questions and Answers (2026)

50 cloud and DevOps interview questions covering AWS Lambda, Docker, Microservices, API Gateway, S3, serverless, and Azure Entra ID. With code examples.

40 SQL Interview Questions and Answers (2026)

40 SQL and relational database interview questions covering joins, indexes, ACID, window functions, CTEs, MySQL vs PostgreSQL, and query challenges.

Caching Strategies Explained: CDN, Redis & DB Cache

A practical guide to caching strategies: browser cache, CDN, in-process memory, and Redis. Learn which layer to use, cache-aside patterns, and invalidation.

GitHub Actions Security: 7 Misconfigurations to Avoid

The 7 GitHub Actions misconfigurations behind real supply chain attacks: weak GITHUB_TOKEN scope, pull_request_target, unpinned actions, script injection.

LLMCostCalc

Compare Monthly LLM API Costs Across Claude, GPT-5, and Gemini

Enter your monthly API call volume and average prompt/response sizes to instantly compare costs across every major Claude, GPT-5, and Gemini model side by side, with context caching savings and a best-value recommendation.

tsgoCalc

TypeScript 7 Build Time and CI Savings Estimator

Enter your project's file count, lines of code, monorepo structure, and CPU cores to see your projected TypeScript 7 (tsgo) build time, speedup ratio, and monthly CI time and cost savings. Free, runs entirely in your browser.

RedisCalc

Redis Memory Calculator and Instance Size Estimator

Estimate Redis memory usage from your key count, data type, and value sizes. Get a memory breakdown, encoding warnings, a recommended instance size, and a cloud pricing comparison. Free, runs entirely in your browser.