202631 posts
- Why kitchen recipes don't scale linearly (and the salt floor that breaks everything)
Tutorial · 6 min read
- BMI is a 200-year-old metric — what it actually tells you (and what it doesn't)
Tutorial · 5 min read
- Cost per kilometre — the only fuel number worth tracking
Finance · 5 min read
- PDF vs EPUB: when each one wins
Tutorial · 6 min read
- Font size, line height, letter spacing — the typography triangle
Design · 5 min read
- The pomodoro myth — what Cirillo actually said vs the watered-down version
Tutorial · 5 min read
- Base64 encoding across 5 languages: JavaScript, Python, Go, Rust, PHP
Encoding · 2 min read
- Hashing in 2026: SHA-256, HMAC and PBKDF2 across Node, Python, Go, Rust
Encoding · 1 min read
- Generating UUIDs across languages: stdlib vs libraries in 2026
Developer · 1 min read
- HTTP status codes: the only reference you'll need
Cheatsheet · 3 min read
- ISO 8601 date format cheatsheet: every variant with examples
Cheatsheet · 2 min read
- How to verify webhook signatures: Stripe, GitHub, Slack
Encoding · 1 min read
- Why your regex is slow: catastrophic backtracking explained
Developer · 2 min read
- NaN, null and undefined in JSON: what serialises to what
Data · 2 min read
- Timezone conversion: the edge cases that bite
Developer · 6 min read
- Why 0.1 + 0.2 !== 0.3 (and what to do with money)
Finance · 4 min read
- How to generate a strong password (and what entropy means)
Encoding · 5 min read
- Base64URL vs Base64: when the extra characters matter
Encoding · 3 min read
- Compound interest explained with 5 worked examples
Finance · 6 min read
- OKLCH for designers: why switch from HSL
Design · 5 min read
- PNG vs JPG vs WebP: pick the right image format in 2026
Design · 5 min read
- What is HMAC (and why SHA-256 alone isn't enough)?
Encoding · 5 min read
- Cron schedule cheatsheet: 50 patterns with explanations
Cheatsheet · 5 min read
- UUID v4 vs v7: which should you use in 2026?
Developer · 5 min read
- Complete regex cheatsheet (with copy-paste patterns that actually work)
Cheatsheet · 8 min read
- How to convert JSON to YAML (and back) without breaking things
Data · 5 min read
- Cron syntax explained: a no-nonsense guide
Developer · 6 min read
- Base64 explained: what it is, what it isn't, and when to use it
Encoding · 4 min read
- JSON vs XML in 2026: which should you actually use?
Data · 5 min read
- What is a JWT? A practical guide for developers in 2026
Developer · 6 min read