TLDR-first cheat sheets for modern development. Pick a topic, scan the summary, copy the code. One concept per page.
Ownership, traits, async — the cheat sheet
Concise reference for Rust's ownership model, error handling, traits, generics, and async patterns.
DI, guards, pipes — all in one page
Quick-reference for NestJS CLI, dependency injection, guards, middleware, and module patterns.
App Router, Server Actions, caching — TLDR
Fast reference for Next.js App Router, data fetching, server actions, and deployment patterns.
Commands you actually use daily
No-nonsense Git reference. Branching, merging, rebasing, undoing mistakes, and workflows.
Dockerfile → Compose → Deploy
Container essentials. Images, volumes, networking, Compose, and production patterns.
Types, generics, utilities — quick lookup
Type system reference. Generics, utility types, narrowing, and common patterns.
Hooks, state, performance — all in one place
Deep dive into React hooks, state management, performance patterns, and React 19 features.
Event loop, streams, REST & auth
Core Node.js patterns. Event loop internals, streams, REST API design, and security essentials.
Arrays, trees, DP — interview-ready patterns
Data structures & algorithms cheat sheet. Sliding window, BFS/DFS, dynamic programming, and sorting.
JOINs, CTEs, window functions — one page
SQL reference covering joins, subqueries, aggregations, indexing, and window functions.
Scalability, patterns, databases — TLDR
System design fundamentals. Scalability, architecture patterns, databases, and messaging.
v4 utilities, responsive, modern styling
Tailwind CSS v4 reference. Utility classes, responsive design, and modern styling patterns.