Library
Knowledge
How the everyday tools actually behave: JavaScript, SQL, Grafana, nginx, and whatever we add next. Each note is a static page. Syntax highlighting is baked in at build time, so reading one does not load a third-party script.
4 articles
- JavaScriptarraysasyncdom
Common JavaScript commands and how to use them
Everyday JavaScript that earns its place: array methods, destructuring, async/await, fetch, JSON, the DOM, and localStorage, with the pitfalls included.
9 min read
- Databasessqlqueriesindexes
SQL essentials
SQL for everyday work: filters, joins, grouping, CTEs, window functions, safe writes, indexes, and the NULL behaviour that quietly changes results.
9 min read
- Observabilitygrafanapromqllogql
Grafana query languages
How Grafana queries Prometheus and Loki: PromQL rates, histograms, and LogQL, plus dashboard variables and the mistakes that blank a panel.
10 min read
- Serversnginxtlsproxy
Nginx explained
Server blocks, location order, reverse proxies, caching, gzip, Let's Encrypt, redirects, rate limits, and how to test and reload nginx safely.
9 min read