Guides
Plain-English explainers written and reviewed by the Developer Toolkit team. No jargon, no filler.
JSON, YAML, or CSV: pick the right container
Three formats, three jobs. When each one shines, when each one bites, and why "it depends" has an actual answer.
5 min read · Reviewed July 2026
The Norway problem: when YAML says no
A country code that becomes false, versions that lose their zeros, and the YAML type-guessing that has broken real deployments.
4 min read · Reviewed July 2026
Regex: the 20% that solves 80% of problems
You don’t need to master regular expressions. You need about twelve pieces of syntax, the greediness trap, and a tester. Here’s the kit.
6 min read · Reviewed July 2026
Unix time: the number that runs everything
Why computers count seconds since 1970, what happens in 2038, and the seconds-vs-milliseconds bug every developer ships once.
5 min read · Reviewed July 2026
CSV: the 50-year-old format that refuses to die
No official standard, mangled by Excel, ambiguous about everything — and still the lingua franca of data. Why, plus the survival rules.
5 min read · Reviewed July 2026