Examples

Build a command-line tool in Go using Cobra with subcommands, persistent flags, shell completion, help templates, and configuration loading from environment.

Implement CORS middleware in Go with configurable allowed origins, methods, headers, preflight request handling, and credential support for cross-origin API.

Handle multipart file uploads in Go with size limits, MIME type validation, unique filename generation, streaming to disk without buffering entire file, and.

Validate form data in Go using struct tags with the validator package, custom validation functions, nested struct validation, and human-readable error.

Create a gRPC server in Go with protobuf service definitions, interceptor middleware for logging and auth, graceful shutdown, health checks, and reflection.

Make HTTP requests in Go with retry logic, exponential backoff, context-based timeouts, connection pooling, and response decoding to typed structs using.

Create a production-ready HTTP server in Go with middleware chaining, graceful shutdown, request logging, CORS handling, and context-based timeouts. Uses.

Generate and validate JWT tokens in Go using the golang-jwt package with custom claims, token expiration, and middleware for protected HTTP routes. Includes.

Implement JWT authentication flow in Node.js Express with bcrypt password hashing, token signing and verification, refresh token endpoint, and protected.

Build an interactive CLI tool in Node.js using Inquirer for prompts, chalk for colored output, and ora for spinners. Includes command chaining, template.

Handle file uploads in Node.js Express using multer middleware with disk and memory storage strategies, file filtering by MIME type, size limits, and.

Validate form data in Node.js Express using express-validator middleware chains, custom sanitizers, grouped error responses, and conditional validation.

Implement a cached fetch wrapper in vanilla JavaScript using the Cache API with stale-while-revalidate strategy, request deduplication, and automatic cache.

Implement JWT authentication in vanilla JavaScript with token storage in localStorage, automatic token attachment to fetch requests, expiry checking, and.

Build a command-line utility in vanilla JavaScript using process.argv parsing, readline for interactive prompts, chalk-free colored output with ANSI codes,.

Fetch and render remote data with vanilla JavaScript using async/await, AbortController for cancellation, loading state management, and error handling with.

Upload files with vanilla JavaScript using XMLHttpRequest for progress tracking, drag-and-drop support, file type validation, and chunked upload for large.

Validate HTML forms with vanilla JavaScript using the Constraint Validation API. Provides custom error messages, real-time validation on input, and.

Build a file upload component in Vue 3 with drag-and-drop, progress bar, multiple file support, preview thumbnails for images, and automatic upload with.

Fetch data in Vue 3 using composables with reactive loading states, error handling, automatic refetch on parameter change, and cleanup on component unmount.

Build reactive forms in Vue 3 using the Composition API with ref and computed. Includes two-way binding, validation rules, dynamic field generation, and.

Fetch and aggregate data from multiple APIs in FastAPI using asyncio.gather for concurrent requests, httpx connection pooling, response caching with TTL,.

Handle file uploads in FastAPI with UploadFile, enforce file size limits, validate MIME types, and save to disk with unique filenames. Includes async.

Handle file uploads in FastAPI using UploadFile with async streaming, file size validation, MIME type checking, background task processing, and multiple.

Validate form data in FastAPI using Pydantic models with custom validators, field constraints, and automatic error response generation. Includes email.

Implement JWT authentication in Python using PyJWT with HS256 signing, token verification, expiry validation, and FastAPI dependency injection for protected.

Implement JWT authentication in FastAPI with python-jose and passlib. Includes token generation, verification middleware, password hashing with bcrypt, and.

Build a command-line tool in Python using Click with subcommands, option parsing, colored output, progress bars, and configuration file loading. Includes.

Fetch remote data in Python using httpx with async support, retry logic, timeout handling, response parsing with Pydantic models, and connection pooling for.

Validate form data in Python using Pydantic v2 models with custom validators, nested model validation, error message customization, and JSON schema export.