Cheat Sheets
Quick-reference cheat sheets for languages, test tools, AI frameworks, and developer tools.
Tutorials
Linux Command Line Cheat Sheet: Files, Permissions, Processes, and Networking
Essential Linux commands for navigating files, searching text, managing permissions, monitoring processes, and checking the network.
Docker and kubectl Cheat Sheet: Containers, Images, Compose, and Kubernetes
Quick reference for Docker commands, a Dockerfile, Docker Compose, and the kubectl commands you use to inspect and manage Kubernetes workloads.
SQL Cheat Sheet: SELECT, Joins, Aggregates, and Data Changes
A quick SQL reference for filtering, sorting, joining, grouping, subqueries, inserting, updating, and creating tables.
Git Cheat Sheet: Everyday Commands, Branching, and Undoing Mistakes
A practical Git quick reference: setup, commits, branches, merging, remotes, stashing, and safe ways to undo changes.
Langflow Cheat Sheet: Install, Components, API Calls, and Custom Components
A Langflow quick reference: running it, the interface, key components, calling a flow over the API, environment settings, and a custom component skeleton.
LangGraph Cheat Sheet: StateGraph, Routing, Memory, and Human-in-the-Loop
A LangGraph 1.x quick reference: state and reducers, nodes and edges, conditional routing, checkpointers, interrupts, and streaming.
LangChain Cheat Sheet: Models, Tools, Agents, Memory, and RAG (v1)
A LangChain v1 quick reference: init_chat_model, streaming, structured output, tools, create_agent, memory, middleware, and retrieval.
Claude Prompting Cheat Sheet: Techniques, Templates, and API Basics
Practical prompt patterns for Claude: clear instructions, XML tags, examples, role prompts, reasoning, output control, and ready-to-use templates.
Selenium WebDriver Cheat Sheet: Locators, Waits, and Actions (Python and Java)
A quick reference for Selenium 4: starting a browser, locators, explicit waits, forms, frames, windows, alerts, and actions.
Playwright Cheat Sheet: Locators, Assertions, Config, and CLI (TypeScript)
Quick reference for Playwright Test in TypeScript: setup, locators, actions, web-first assertions, fixtures, API testing, and debugging commands.
Java Cheat Sheet: Syntax, Collections, Streams, and Records
A quick reference for modern Java: types, strings, collections, loops, classes, records, streams, and exception handling.
TypeScript Cheat Sheet: Types, Interfaces, Generics, and Utility Types
A compact TypeScript reference for types, unions, interfaces, generics, narrowing, utility types, and tsconfig settings.
JavaScript Cheat Sheet: Modern ES6+ Syntax and Array Methods
A quick reference for modern JavaScript: variables, functions, destructuring, array methods, async/await, modules, and the DOM.
Python Cheat Sheet: Syntax, Collections, Functions, and Files
A one-page Python 3 quick reference: variables, strings, lists, dicts, comprehensions, functions, classes, files, and errors.