Check out Rustlings, a hands-on resource that lets you practice small exercises to understand Rust’s core concepts.

Ruby on Rails is known for developer happiness and speed of development, especially if you want to prototype quickly.

JavaScript’s event loop makes async programming very efficient, especially for I/O-bound tasks, while Python’s asyncio has a steeper learning curve.

Unless you have a specific reason to use JavaScript for data science (e.g., deploying models in the browser), Python is the better choice.

Both languages require similar patterns for error handling, but Python’s simplicity makes it easier to trace exceptions and fix issues quickly.

Watching network requests in the browser’s dev tools usually reveals AJAX endpoints. Directly calling these endpoints is often more efficient.