Developer Cheatsheets

Types, generics, utility types, advanced patterns, async, decorators, and tsconfig.

Goroutines, channels, interfaces, structs, error handling, concurrency, and modules.

Data structures, algorithms, complexity, built-in functions, OOP, and common patterns.

FastAPI, SQLAlchemy, async, packaging, testing, typing, decorators, and project structure.

Strings, arrays, hashes, blocks, OOP, modules, enumerable, file I/O, and Rails essentials.

Ownership, borrowing, lifetimes, structs, enums, traits, pattern matching, and Cargo.

Optionals, collections, closures, protocols, async/await, actors, and SwiftUI basics.

REST APIs, JPA, Security, dependency injection, annotations, testing, and configuration.

List, Set, Map, Queue, Stack, Streams API, String methods, Arrays, Optional, and java.time.

UV package manager, venv, FastAPI routes, Pydantic, auth, SQLAlchemy, and Docker deployment.

Routing, middleware, request binding, JWT auth, GORM database, validation, and testing.

Models, ORM, views, forms, auth, Django REST Framework, Blueprints, and SQLAlchemy.

Express, Hono, Elysia, NestJS, tRPC, oRPC, Bun — routes, middleware, and type-safe APIs.

React hooks & patterns, Vue 3 Composition API, Nuxt 3, Svelte 5 runes, and state management.

Selectors, box model, flexbox, grid, animations, responsive design, and everyday patterns.

Schema design, joins, indexes, transactions, window functions, JSON, CTEs, and performance tuning.

MongoDB CRUD & aggregation, Redis data types & caching patterns, DynamoDB, and when to use what.

Schema definition, CRUD queries, relations, migrations, Drizzle Studio, and Prisma Client.

OAuth 2.0 flows, OIDC, JWT claims, JWKS, PKCE, token management, and security best practices.

TypeScript auth library — email/password, OAuth providers, sessions, 2FA, plugins, and Next.js integration.

Sorting algorithms, binary search, BFS/DFS, dynamic programming, greedy, and backtracking.

Scaling, load balancers, caching, CAP theorem, message queues, microservices, and common designs.

Processes, threads, CPU scheduling, memory management, deadlocks, file systems, and networking.

Prompt engineering, token optimization, RAG, embeddings, API usage, and evaluation metrics.