Next.js Cheatsheet 02 — App Router Routing
Cheatsheet: dynamic routes, catch-all, route groups, parallel and intercepted routes.
Cheatsheet
React Cheatsheet 02 — Hooks Reference
Cheatsheet: every built-in hook with practical usage and gotchas.
TypeScript Cheatsheet 02 — tsconfig and Compile Targets
Cheatsheet: tsconfig fields, strict family, moduleResolution, NodeNext, project refs.
Python Cheatsheet 02 — Type Hints (Modern)
Cheatsheet: X | None syntax, generics, Protocol, TypedDict, ParamSpec, type guards.
Integration Cheatsheet 02 — Full Request Lifecycle
Cheatsheet: trace a request from socket to response through all four libraries.
Alembic Cheatsheet 02 — Commands
Cheatsheet: complete list of alembic CLI commands with flags and common scenarios.
Pydantic Cheatsheet 02 — Field and Constraints
Cheatsheet: Field options, constraints (min/max/gt/le/pattern), defaults, default_factory, aliases.
SQLAlchemy + Postgres Cheatsheet 02 — JSONB Patterns
Cheatsheet: JSONB column, containment, path access, GIN index, jsonb_set, ON CONFLICT updates.
SQLAlchemy Cheatsheet 02 — Schema, Mapped Columns, and Types
Cheatsheet: DeclarativeBase, Mapped/mapped_column, type mappings, server_default, indexes, unique/check/FK, naming conventions.
FastAPI Cheatsheet 02 — Pydantic Request Validation
Cheatsheet: BaseModel, Field, validators, custom errors, nested, discriminated unions, strict mode at the boundary.