Programming cheatsheets
Language syntax, methods, and common patterns. Copy-ready commands, syntax and shortcuts for the work you do every day. Every entry is searchable, copyable in one click, and printable on a single page.
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Programming Language syntax, methods, and common patterns
- Barcode Formats 40 commands · 8 sections New
CODE128CODE39Code 128, Code 39, EAN and UPC inputs, check digits, export settings, and print checks for barcode generation. - JavaScript ES6+ 59 commands · 9 sections
const x = 1let y = 2Modern JavaScript syntax: destructuring, arrow functions, promises, modules, and built-in methods - Python Essentials 59 commands · 8 sections
x = 10x = 3.14Python syntax, data structures, comprehensions, built-in functions, and common patterns - Regular Expressions 44 commands · 8 sections
.\dJavaScript-style regex syntax, character classes, quantifiers, groups, assertions, flags, and example shape patterns. - SQL Reference 43 commands · 7 sections
SELECT * FROM tableSELECT col1, col2 FROM tableCommon SQL clauses for queries, joins, aggregation, data changes, tables, and indexes. Check the database dialect. - TypeScript Essentials 63 commands · 9 sections New
let name: string = "hello"let age: number = 25Types, interfaces, generics, utility types, type guards, and advanced TypeScript patterns - NPM Commands 59 commands · 9 sections New
npm initnpm init -yPackage management: install, update, publish, scripts, audit, and configuration - Redis Commands 75 commands · 9 sections New
redis-cliredis-cli -h host -p 6379Strings, hashes, lists, sets, sorted sets, pub/sub, streams, and transactions - MySQL Reference 64 commands · 9 sections New
mysql -u root -pmysql -h host -u user -p dbnameMySQL queries, joins, indexes, user management, and database administration - jq Commands 37 commands · 7 sections New
jq . file.jsonjq -c . file.jsonPretty-print, select, map, and transform JSON on the command line
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