What are some interesting async programming challenges I can try?

What are some interesting async programming challenges I can try?

Here are a few async programming challenges you can try:

1. Implement a simple web scraper using async/await.
2. Create a chat application that handles multiple users asynchronously.
3. Build a file downloader that can download multiple files in parallel.
4. Develop a REST API that processes requests asynchronously.

Can you explain how to implement the web scraper?

Sure! To implement a simple web scraper using async/await in JavaScript, you can use the 'axios' library for HTTP requests and 'cheerio' for parsing HTML. Here's a basic outline:

1. Install the libraries: npm install axios cheerio
2. Use axios to fetch the webpage content asynchronously.
3. Load the HTML into cheerio to parse and extract the desired data.
4. Handle errors and ensure proper async flow.

What are some common pitfalls in async programming?

Common pitfalls include:

1. Forgetting to handle promise rejections, which can lead to unhandled promise errors.
2. Blocking the event loop with synchronous code, negating the benefits of async.
3. Not managing concurrency properly, which can lead to resource exhaustion.

Can you give me an example of a chat application?

Absolutely! A simple chat application can be built using Node.js with Socket.io for real-time communication. You would set up a server that listens for incoming messages and broadcasts them to all connected clients asynchronously. This allows multiple users to chat in real-time without blocking the server.