Async Await

A comprehensive reference guide for modern JavaScript (ES6+) features and patterns. Covers arrow functions, destructuring, async/await, Promises, functional programming, classes, modules, iterators, generators, and performance optimization techniques for writing clean, maintainable code.

A comprehensive reference guide for Python asynchronous programming. Covers asyncio fundamentals, coroutines, tasks, async context managers, producer-consumer patterns, rate limiting with semaphores, and real-world examples including web scraping with aiohttp, async database operations, and WebSocket servers.