Cheat Sheets
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AI
Agent tools, model workflows, and practical operating patterns
Languages
Syntax, data, query, and markup references
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C Quick Reference Syntax, pointers, memory management, standard library essentials
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C++ Quick Reference Classes, templates, STL, smart pointers, modern C++ essentials
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C# Quick Reference Types, LINQ, async/await, collections, OOP essentials
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CSS Quick Reference Selectors, layout, flexbox, grid, animation, responsive design
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Dart Quick Reference Types, functions, classes, async, null safety, collections
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Go Quick Reference Syntax, types, concurrency, error handling essentials
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GraphQL Quick Reference Schemas, queries, mutations, types, fragments
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HTML & CSS Quick Reference Elements, selectors, flexbox, grid, responsive
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HTTP Status Codes Quick Reference Status codes, headers, and common response patterns
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Java Quick Reference OOP, collections, streams, exception handling essentials
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JavaScript Quick Reference ES6+ · DOM · Fetch · Async
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JSON Quick Reference Syntax, data types, objects, arrays, jq
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Kotlin Quick Reference Null safety, coroutines, data classes, functional programming essentials
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Lua Quick Reference Tables, functions, metatables, coroutines, modules, patterns
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Markdown Quick Reference Headings, links, images, code blocks, tables
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MATLAB Quick Reference Arrays, matrices, plotting, file I/O, control flow
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Matplotlib Quick Reference Figures, axes, plots, and customization
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NumPy Quick Reference Array creation, math, linear algebra, and more
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pandas Quick Reference DataFrames, selection, aggregation, merging, and more
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Perl Quick Reference Variables, regex, file I/O, references, modules essentials
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PHP Quick Reference Syntax, arrays, OOP, database, file I/O essentials
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Python 3 Quick Reference Basics through pandas, requests, csv, json
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PyTorch Quick Reference Tensors, autograd, neural networks, and training
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Regular Expressions Quick Reference Patterns, quantifiers, groups, lookaheads, flags
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Ruby Quick Reference Objects, blocks, iterators, regex, file I/O essentials
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Rust Quick Reference Ownership, types, traits, pattern matching essentials
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Sass/SCSS Quick Reference Variables, nesting, mixins, functions, control flow
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SQL Quick Reference SELECT, JOIN, subqueries, indexes, transactions
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Swift Quick Reference Types, optionals, protocols, error handling essentials
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TOML Quick Reference Tables, strings, numbers, dates, arrays
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TypeScript Quick Reference Types, interfaces, generics, utility types
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XPath Quick Reference Axes, predicates, functions, operators, node selection
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YAML Quick Reference Scalars, sequences, mappings, anchors, multi-line
Tools
Version control, shells, containers, and workflows
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Alpine Linux Quick Reference Package management, services, networking, Docker base image
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AWK Quick Reference Patterns, fields, arrays, functions, text processing
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Bash Quick Reference Commands, scripting, pipes, redirection, job control
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Bitbucket Pipelines Quick Reference CI/CD pipelines, caching, artifacts, deployments
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chmod Quick Reference File permissions, numeric & symbolic modes, special bits, umask
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Chrome DevTools Quick Reference Elements, Console, Network, Performance, debugging
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Conventional Commits Quick Reference Commit message format, types, scopes, breaking changes
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Cron Quick Reference Job scheduling, crontab syntax, special strings, logging
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curl Quick Reference HTTP requests, headers, auth, forms, debugging
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Docker Quick Reference Containers, images, volumes, networking, compose
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Emacs Quick Reference Navigation, editing, buffers, search, org mode, packages
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Emmet Quick Reference HTML abbreviations, nesting, attributes, CSS shortcuts
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find Quick Reference File search by name, type, size, time, permissions, and actions
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Git Quick Reference Branches, merging, rebasing, stashing, remotes
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GitHub Actions Quick Reference Workflows, triggers, jobs, secrets, caching, artifacts
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GitHub CLI Quick Reference Repos, issues, PRs, actions, releases, API
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GitLab CI/CD Quick Reference Pipelines, jobs, stages, variables, artifacts, environments
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grep Quick Reference Pattern matching, regex, recursive search, context, filtering
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Homebrew Quick Reference Package management, casks, taps, services, cleanup
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Jest Quick Reference Tests, matchers, mocking, async, and snapshots
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Jira Quick Reference Issues, JQL, workflows, boards, sprints, filters
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Kubernetes Quick Reference kubectl, pods, deployments, services, configs, debugging
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LaTeX Quick Reference Document structure, math, tables, figures, and more
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MongoDB Quick Reference CRUD, queries, aggregation, indexes, schema design
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MySQL Quick Reference Databases, tables, CRUD, joins, indexes, users
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Neo4j / Cypher Quick Reference Graph database queries, nodes, relationships, patterns
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Nginx Quick Reference Server blocks, proxying, SSL, load balancing, logging
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nmap Quick Reference Port scanning, host discovery, service detection, and NSE scripts
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npm Quick Reference Package management, scripts, versioning, publishing, workspaces
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OpenSSL Quick Reference Certificates, keys, encryption, and debugging
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PostgreSQL Quick Reference Tables, queries, joins, indexes, JSON, roles
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PowerShell Quick Reference Cmdlets, pipeline, objects, scripting, modules
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Redis Quick Reference Strings, lists, sets, hashes, pub/sub, persistence
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GNU Screen Quick Reference Sessions, windows, splits, copy mode, and sharing
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sed Quick Reference Stream editing, substitution, addresses, hold space, in-place transforms
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Selenium WebDriver Quick Reference Browser automation, element interaction, waits, and assertions
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SSH Quick Reference Connections, keys, config, tunnels, SCP, SFTP
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Sublime Text Quick Reference Navigation, editing, multi-cursor, search, packages
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systemd Quick Reference Service management, units, timers, and journalctl
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Terraform Quick Reference Providers, resources, variables, state, modules
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tmux Quick Reference Sessions, windows, panes, copy mode, configuration
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Vim Quick Reference Modes, navigation, editing, search, macros, buffers
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VS Code Quick Reference Navigation, editing, multi-cursor, terminal, debugging, extensions
Frameworks
Application frameworks and UI libraries
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Django Quick Reference Models, views, templates, ORM, forms, admin, auth
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Express.js Quick Reference Routing, middleware, requests, responses, patterns
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FastAPI Quick Reference Path operations, validation, dependencies, auth, testing
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Flask Quick Reference Routes, templates, requests, blueprints, database, extensions
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htmx Quick Reference Attributes, triggers, swapping, events, extensions
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jQuery Quick Reference Selectors, DOM, events, AJAX, effects, traversal
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Laravel Quick Reference Artisan, routing, Eloquent, Blade, middleware, auth
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React Quick Reference Components, hooks, state, effects, patterns
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Socket.IO Quick Reference Events, rooms, namespaces, middleware, real-time patterns
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Svelte Quick Reference Components, reactivity, stores, transitions, SvelteKit
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Vue.js Quick Reference Templates, reactivity, components, composition API, router
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WordPress Quick Reference Themes, hooks, queries, REST API, custom post types