rem vs em vs px: Choosing CSS Units
By qc_admin
How px, em and rem actually differ: px is fixed, em compounds from the parent font-size, and rem stays anchored to the root. When to use each.
Author: qc_admin
Percent-Encoding and Reserved Characters in URLs
By qc_admin
The RFC 3986 character sets that decide what to percent-encode: unreserved, gen-delims, sub-delims, and how the rules differ per URL component.
Password Entropy Explained (Bits, Pools, and Length)
By qc_admin
Password entropy measures unpredictability in bits. Learn how pool size and length set it, and why it only counts for truly random passwords.
OKLCH and Modern CSS Colour
By qc_admin
Why OKLCH describes colour by lightness, chroma and hue in a perceptually uniform space, and how that makes readable palettes and predictable tints.
JWT vs Session Cookies: Choosing an Auth Approach
By qc_admin
JWTs are stateless and self-contained; session cookies are stateful and server-tracked. Learn the trade-offs in revocation, storage, and size.
The Markdown Syntax Guide
By qc_admin
A practical guide to Markdown: headings, lists, links, code, tables and the whitespace rules that trip people up, plus how flavours differ.
JSONPath Explained: Querying JSON by Path
By qc_admin
A practical guide to JSONPath: how the syntax maps onto a JSON document, what each operator does, and the pitfalls to watch for.
ISO 8601 Date and Time Format, Explained
By qc_admin
What ISO 8601 actually specifies: the YYYY-MM-DD date, the T separator, the Z and offset suffixes, durations, and why it sorts and parses cleanly.
HTML Entities: A Quick Reference and How They Work
By qc_admin
HTML entities are text codes that stand in for reserved or awkward characters. What they are, when you must use them, and a reference of the common ones.
How to Minify JSON (and When You Should)
By qc_admin
What JSON minification actually removes, how much it saves, when it helps, and when a pretty-printed file is the better choice.