Developer

What is ASCII art? The full story — from 1867 typewriter art to BBS culture — plus how image-to-ASCII conversion works and where text art is still useful today.

Binary to decimal explained step by step: the positional method, Horner’s fast doubling trick for mental math, a powers-of-2 reference table, and 8 practice problems with answers.

What is Base64 data URI? A practical developer guide: the data: URI syntax broken down, real img/CSS/favicon examples, and the honest truth about the 33% size cost.

What is minified JavaScript? A beginner-friendly guide with a real before/after example, what each transformation does, honest performance facts, and why minified code is not protected code.

JSON vs XML — stop asking which is better. The same real API payload measured in both formats (467 vs 731 bytes), the decision rule, and where XML still wins in 2026.

How to convert JSON to CSV without coding or with code: online tool, Excel, Google Sheets, Python, and CLI — plus the nested-JSON flattening problem and honest size limits.

Cron expression explained simply: learn to read the 5 fields in 10 minutes, with 12 decoded examples, a practice section with answers, and the cross-system traps to avoid.

What is a UUID? A clear beginner-friendly guide to universally unique identifiers: the 8-4-4-4-12 anatomy, UUID v4 vs v7, UUID vs GUID, and when to use one.

What is an API with example? A simple guide with a real API call to run in your browser, request/response anatomy, everyday examples, and what REST means.

What are HTML entities? A beginner-friendly explainer with the 20 entities you’ll actually use, names vs numbers, and why UTF-8 made most of them optional.