DevRef

Developer Cheatsheets

Quick reference cards for programming languages, tools, and frameworks. Essential commands, syntax, and patterns at a glance.

Bash Cheatsheet

Quick reference for Bash shell scripting including variables, loops, conditionals, string manipulation, and file operations.

Cron Cheatsheet

Quick reference for cron expression syntax, special strings, field values, and common scheduling patterns.

CSS Flexbox Cheatsheet

Quick reference for CSS Flexbox layout including container properties, item properties, alignment, and common layout patterns.

CSS Grid Cheatsheet

Quick reference for CSS Grid layout including template areas, auto-flow, gap, spanning, named lines, and common layout patterns.

CSS Selectors Cheatsheet

Quick reference for CSS selectors including element, class, ID, attribute, pseudo-class, pseudo-element, and combinator selectors.

curl Cheatsheet

Quick reference for curl commands including GET, POST, headers, authentication, cookies, file upload, and debugging options.

Git Cheatsheet

Quick reference for essential Git commands including init, clone, branch, merge, rebase, stash, log, reset, and cherry-pick.

JavaScript Array Methods Cheatsheet

Quick reference for JavaScript array methods including map, filter, reduce, find, some, every, flat, sort, and more.

JavaScript Date Methods Cheatsheet

Quick reference for JavaScript Date methods including constructors, getters, setters, formatting, parsing, and timestamp operations.

JavaScript String Methods Cheatsheet

Quick reference for JavaScript string methods including slice, split, replace, includes, startsWith, trim, padStart, and more.

Markdown Cheatsheet

Quick reference for Markdown syntax including headings, lists, links, images, code blocks, tables, footnotes, and extensions.

Python String Methods Cheatsheet

Quick reference for Python string methods including split, join, strip, replace, format, f-strings, and common string operations.

Regex Cheatsheet

Quick reference for regular expression syntax including character classes, quantifiers, anchors, groups, and lookaround assertions.

SQL Cheatsheet

Quick reference for SQL syntax including SELECT, WHERE, JOINs, GROUP BY, HAVING, window functions, CTEs, and subqueries.

tmux Cheatsheet

Quick reference for tmux commands including sessions, windows, panes, key bindings, copy mode, and configuration options.

TypeScript Utility Types Cheatsheet

Quick reference for TypeScript built-in utility types including Partial, Required, Pick, Omit, Record, Exclude, Extract, and ReturnType.

Vim Cheatsheet

Quick reference for Vim commands including modes, navigation, editing, search and replace, macros, registers, and window management.