Developer cheatsheets
6 battle-tested references. Filter by category or search — every guide includes tables, runnable snippets, and edge cases.
Showing 6 of 6 guides
HTTP Status Codes Cheatsheet: What to Return & When
Developer HTTP status code reference: 2xx, 3xx, 4xx, 5xx meanings, when to return each code, and REST API error-handling best practices.
SQL Queries Cheatsheet: SELECT, JOINs & Indexing
Practical SQL cheatsheet covering SELECT, WHERE, JOINs, GROUP BY, window functions, indexing, and query optimization with examples.
HTML5 Tags & SEO Cheatsheet: Semantic Markup Guide
Semantic HTML5 tags cheatsheet with SEO essentials: meta tags, headings, Open Graph, structured data, and accessible markup patterns.
Git Commands Cheatsheet: 40 Workflows That Save You
Essential Git cheatsheet with 40 commands for branching, rebasing, stashing, undoing mistakes, and clean team workflows with real examples.
Regex Patterns Cheatsheet: 25 Copy-Paste Examples
Battle-tested regex cheatsheet with 25 copy-paste patterns for email, URLs, dates, plus flags, groups, and catastrophic backtracking fixes.
Markdown Guide: Syntax, Tables & MDX Tips
Complete Markdown guide with headings, tables, task lists, footnotes, code blocks, and MDX tips for docs, blogs, and READMEs that render well.