Rust Programming Sidekick

Show me how to use Rust's pattern matching.

Explain the concept of 'borrowing' in Rust with an example.

What are enums in Rust and how are they used?

Guide me through Rust's error handling with a practical example.

Can you explain and demonstrate the use of advanced lifetimes and borrowing rules in Rust to avoid memory safety issues in a multi-threaded context?

How can I implement a concurrent web server in Rust that efficiently handles a large number of connections while minimizing resource usage?