Programming Languages

🐍

Python Formatter

Format Python code to PEP8 style 🐍

PEP8 Checker

Check Python PEP8 compliance 🐍

venv Setup Guide

Python virtual env setup guide 🐍

pip Commands Reference

Python pip commands cheatsheet 🐍

Type Hints Guide

Python type annotation reference 🐍

List Comprehension

List/set/dict comprehension examples 🐍

Decorators Reference

Python decorator patterns & examples 🐍

Generators Reference

Python generator & yield guide 🐍

asyncio Reference

Python async programming reference 🐍

dataclass Reference

Python dataclasses module guide ⚡

ES6+ Cheatsheet

ES6/ES2017+ syntax cheatsheet ⚡

Promise Patterns

Promise & async/await patterns ⚡

Array Methods Reference

JavaScript Array methods reference HOT ⚡

Object Methods Reference

JavaScript Object methods reference ⚡

Closure Patterns

JavaScript closure use patterns ⚡

Prototype Chain Guide

Prototype chain & inheritance guide ⚡

Event Loop Reference

Event loop mechanism illustrated ⚡

Module Patterns

CommonJS/ESM/UMD module comparison ⚡

JS Regex Reference

JavaScript RegExp full reference ⚡

Web APIs Reference

Browser Web API quick reference 📘

Utility Types Reference

TypeScript built-in utility types 📘

tsconfig Generator

Interactive tsconfig.json generator 📘

Interface Builder

Visual TypeScript interface builder 📘

Generics Guide

TypeScript generics syntax guide 📘

TS Decorators

TypeScript decorator syntax & examples 📘

Strict Mode Guide

TypeScript strict mode config guide 📘

Type Guards Reference

Type guard patterns reference 📘

Conditional Types

Conditional type syntax reference 🐹

Go Commands Reference

go build/test/mod commands guide 🐹

Go Modules Guide

Go module management & go.mod 🐹

Concurrency Patterns

Goroutine & Channel patterns 🐹

Interface Patterns

Go interface design patterns 🐹

Error Handling Guide

Go error handling best practices 🐹

Goroutine Guide

Goroutine lifecycle & management 🐹

Channel Patterns

Go channel usage patterns 🐹

Go Testing Guide

Go testing package cheatsheet 🦀

Cargo Commands

Rust Cargo commands cheatsheet 🦀

Ownership Guide

Ownership & borrowing rules guide 🦀

Lifetime Reference

Lifetime annotation syntax guide 🦀

Trait Patterns

Trait design & common patterns 🦀

Rust Error Handling

Result/Option error patterns 🦀

Async Patterns

async/await & tokio reference 🦀

Macros Guide

Declarative & proc macro guide ☕

Maven Commands

Maven build tool commands guide ☕

Gradle Commands

Gradle build tool commands guide ☕

Stream API Reference

Java Stream API method reference ☕

Optional Guide

Java Optional best practices ☕

Concurrency Reference

Java concurrency & thread pools ☕

JVM Reference

JVM params & memory model guide ☕

Annotations Guide

Java annotations usage reference 🐘

Composer Commands

PHP Composer commands cheatsheet 🐘

Artisan Reference

Laravel Artisan commands reference 🐘

Laravel Helpers

Laravel global helper functions 🐘

PSR Standards

PHP PSR standards comparison 🐘

PHP Security Guide

PHP security vulnerabilities guide 💎

Gem Commands

Ruby Gem commands cheatsheet 💎

Rails Commands

Rails CLI commands cheatsheet 💎

RSpec Reference

RSpec testing framework reference 💎

Bundler Guide

Ruby Bundler usage reference 💎

Metaprogramming Reference

Ruby metaprogramming techniques 🍎

SPM Commands

Swift Package Manager commands 🍎

Optional Patterns

Swift Optional usage patterns 🍎

Closures Guide

Swift closure syntax & capture 🍎

Combine Reference

Swift Combine framework reference 🍎

Swift Concurrency

Swift async/await concurrency 🎯

Coroutines Guide

Kotlin Coroutines usage guide 🎯

Collections Reference

Kotlin collection operations 🎯

Extension Functions

Extension functions & properties 🎯

Sealed Classes

Sealed classes & when expressions 🎯

Null Safety Reference

Null safety operators reference 💜

NuGet Commands

NuGet package manager commands 💜

LINQ Reference

C# LINQ query syntax reference 💜

C# async/await

C# async programming reference 💜

Attributes Guide

C# Attribute usage & custom attrs 💜

Records Reference

C# record type syntax reference 🎯

pub Commands

Dart pub package commands 🎯

Flutter CLI

Flutter CLI tool reference 🎯

Null Safety Guide

Dart null safety migration guide 🎯

Streams Reference

Dart Stream/StreamController guide 🔴

SBT Commands

Scala SBT build tool commands 🔴

Collections API

Scala collection operations 🔴

Pattern Matching

Scala pattern matching syntax 🔴

Futures Reference

Scala Future async programming 💧

Mix Commands

Elixir Mix build tool commands 💧

Phoenix Guide

Phoenix framework commands guide 💧

Processes Reference

Elixir process & GenServer guide 💧

Ecto Reference

Elixir Ecto database queries 🔵

Lein Commands

Clojure Leiningen commands 🔵

REPL Guide

Clojure REPL tips & tricks 🔷

Cabal Commands

Haskell Cabal commands guide 🔷

Type System Guide

Haskell type system & typeclasses 📊

R Packages Reference

R package install & usage guide 📊

dplyr Reference

R dplyr data operations reference 🔵

Pkg Commands

Julia Pkg manager commands 🔵

Plotting Reference

Julia Plots.jl plotting guide 🐪

CPAN Commands

Perl CPAN module management 🐪

Advanced Regex

Perl advanced regex reference 🌙

Lua Reference

Lua 5.4 syntax & stdlib guide 🌙

Coroutines Reference

Lua coroutine usage reference 📜

Bash Scripting Guide

Bash scripting syntax & tips 📜

Bash Regex

Bash regex matching reference 📜

Process Substitution

Bash process substitution guide 📜

Bash Arrays Reference

Bash array operations reference 🐘

PHP Composer Guide

Composer package manager guide 💎

Bundler Guide

Ruby Bundler usage reference 🍎

Swift Package Guide

Swift Package Manager guide 🎯

Dart Quick Reference

Dart core syntax & async guide ⚡

Scala Quick Reference

Scala FP & OOP features guide 💧

Elixir Quick Reference

Elixir concurrency & pipe guide λ

Haskell Quick Reference

Haskell types & function guide 🌙

Lua Basics Guide

Lua core syntax quick reference ⚡

C Language Reference

C pointers & memory management ⚡

C++ STL Reference

C++ STL containers & algorithms 💻

Assembly Basics

x86/x64 assembly instruction set 🔍

Regex Flavors Guide

PCRE/Python/JS regex differences 🐚

Shell Scripting Guide

Bash/Zsh scripting tips reference 🔧

AWK & SED Reference

Text processing AWK & SED guide 🔧

Makefile Guide

GNU Make rules & variables guide