Developer cheat sheets

ActionScript 3.0 classes for the Flash/AIR platform, grouped by package.

82 entries

Blogger API v3 resources and methods, plus help for themes, layouts and gadgets.

42 entries

Can you use it? Support tables, Baseline status and usage examples for web platform features.

1214 entries

Special characters with their HTML entities: arrows, math, currency, punctuation, Greek and symbols.

179 entries

CMake commands for targets, control flow, finding packages, variables, modules and the CLI.

88 entries

Selectors, layout, box model, typography and modern CSS features.

81 entries

Visual cheat sheet for CSS Grid Layout — every property with live previews you can copy.

74 entries

Docker CLI for containers, images, volumes, networks and Compose, plus Dockerfile instructions.

90 entries

Drush commands for Drupal: cache, config, modules, database, users, roles and logs.

70 entries

Express 5 API: application, request, response, router and middleware.

98 entries

Visual cheat sheet for CSS Flexible Box Layout — every property with live previews you can copy. The dashed box is the flex container.

61 entries

Everyday Git commands for setup, staging, branching and remotes.

37 entries

Learn Git visually: run commands and watch an animated commit graph, with guided levels.

Interactive tool

Elements, global attributes and input types of modern HTML.

181 entries

Type ul>li*3 or d:f and get full HTML/CSS — live playground plus every built-in abbreviation.

491 entries

Document, Element, Node, Event and Window APIs for scripting web pages.

221 entries

Java SE 25 core classes by package, language features and JDK tools.

148 entries

Core language built-ins: Array, String, Object, Promise, Math and more.

214 entries

Selectors, DOM manipulation, traversal, events, effects and Ajax.

197 entries

Format, validate, repair, minify, convert (YAML/XML/CSV/TypeScript), compare and query JSON.

Interactive tool

Essential Linux commands for files, text, processes, users, networking and packages.

169 entries

Markdown editor with live preview and export, plus a cheat sheet of basic and extended syntax.

Interactive tool

Apache mod_rewrite directives, RewriteRule flags, server variables and condition tests.

95 entries

mongosh methods for collections, cursors and databases, plus query, update and aggregation operators.

117 entries

MySQL 8.4 statements, functions, data types and command-line tools.

156 entries

Core Node.js modules: fs, path, http, events, process, streams, crypto and more.

167 entries

Org mode markup, TODOs, scheduling, tables, source blocks, export and key bindings for Emacs.

55 entries

PHP functions for strings, arrays, files, JSON and dates, plus core language features.

257 entries

Built-in functions, core types and common standard library modules.

151 entries

Copy-paste snippets by task for 24 languages and tools, including VS Code shortcuts — searchable across all.

1055 entries

Base R for help, I/O, data structures, apply functions, strings, statistics and plotting.

119 entries

Test JavaScript regular expressions with live highlighting, explanations and code generation.

Interactive tool

Regular expression syntax: classes, anchors, quantifiers, groups, lookarounds and flags.

85 entries

Ruby 3.4 core classes — String, Array, Hash, Enumerable, Kernel — and syntax guides.

266 entries

Subversion client, admin and inspection commands, properties and revision keywords.

77 entries

Underscore.js helpers for collections, arrays, functions, objects and utilities.

118 entries