Templates

A minimal Express.js REST API with CRUD endpoints for managing todo items, including JSON body parsing and error handling middleware.

A type-safe React hook that persists state to localStorage with automatic serialization and deserialization.

Iterative and recursive binary search implementations that work on any sorted sequence, returning the index or -1.

A lightweight Flask REST API with in-memory storage, request validation, and JSON error responses.

A fully typed generic Stack implementation with push, pop, peek, size, and iterator support.

A production-style Go HTTP server with structured JSON logging, graceful shutdown, and health-check endpoint.

A zero-dependency CLI argument parser that supports flags, options with values, and positional arguments.

Complete CREATE, READ, UPDATE, DELETE queries for a users table with indexing, filtering, and pagination.

A two-service Docker Compose file that runs a Node.js API alongside a PostgreSQL database with health checks and volume mounts.

A CI/CD workflow that runs tests on push/PR and deploys to a staging environment on the main branch.

Reusable decorators for timing, retrying with exponential backoff, and singleton enforcement.

Production-ready debounce and throttle utilities with leading/trailing edge options and cancel support.

A type-safe React context combined with useReducer for global state management, complete with actions and a custom hook.

A fully typed, generic Event Emitter class supporting on, off, once, and emit with wildcard listeners.

A concurrent web scraper using aiohttp and asyncio that fetches multiple pages with rate limiting and error handling.

Express middleware for issuing and verifying JSON Web Tokens with configurable secret, expiry, and role-based authorization.

A comprehensive test suite for a Counter component using React Testing Library and Vitest/Jest, covering user interactions and edge cases.

Implementations of bubble sort, merge sort, and quicksort with timing benchmarks and correctness verification.

A portable Bash script that scaffolds a new Node.js/TypeScript project with Git, ESLint, Prettier, and GitHub repo creation.

A Next.js App Router API route that validates request bodies and query params using Zod schemas with proper error responses.

A validated data class using __post_init__ for field constraints, a from_dict factory method, and serialization.

Robust patterns for concurrent promise execution including settleAll, retryPromise, and batched execution.

A composable middleware chain similar to Koa/Express that processes requests through a pipeline of async handlers.

Advanced SQL queries demonstrating ROW_NUMBER, RANK, LAG/LEAD, running totals, and moving averages over an orders table.

A Rust utility that reads a text file line-by-line with buffered I/O, counts words and lines, and reports file metadata.

A clean REST API built with the Chi router featuring CRUD endpoints, JSON middleware, and a custom 404 handler.

SQLAlchemy 2.0 ORM models with relationships, a typed repository pattern, and query examples including joins and pagination.

A deep clone utility that handles Date, RegExp, Map, Set, Array, plain objects, and circular references without structuredClone.

A type-safe, fluent Builder pattern for constructing complex objects step-by-step with compile-time validation of required fields.

A responsive CSS Grid layout system with utility classes, named grid areas, auto-fit responsive columns, and dark mode support.

A complete FastAPI application with Pydantic models, path/query/body parameter validation, and automatic OpenAPI docs.

A library of reusable higher-order array utilities including chunk, flatten, unique, groupBy, sortBy, and zip.

A from-scratch LRU cache using an OrderedDict with O(1) get/put operations, eviction policy, and a decorator interface.

A production-ready Kubernetes Deployment and Service manifest for a Node.js app with health checks, resource limits, and HPA.

A Result monad type for functional error handling without try/catch, supporting map, flatMap, unwrap, and match.