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Regex cheat sheet: metacharacters, groups, and lookarounds

Regex cheat sheet: metacharacters, quantifiers, anchors, groups, lookarounds, plus 15+ JavaScript and Python patterns and concrete fixes for catastrophic backtracking.

#regex #regular-expression #text-processing

May 13, 2026

12 min read

tutorials

What Is a UUID? Guide to Format, Versions & Use Cases

UUIDs from the ground up: 128-bit structure, hex format, how v1/v3/v4/v5/v7 work internally, collision math, real-world use cases and code examples.

#uuid #guid #rfc-9562

Mar 19, 2026

13 min read

tutorials

Essential Developer Tools for Encoding & Hashing (2026)

Compare 9 free browser-based developer tools for Base64, JSON, UUID, hashing, image compression and unit conversion — all 100% client-side.

#developer-tools #productivity #tutorial

Jan 15, 2025

8 min read