Inconsistent dash (-) and underscore (_) usages in Cargo package names

[tatsuya6502]

I found that some of the Cargo packages in this book have dashes (-) in their names while others are having underscores (_).

Chapter	Cargo Package Name
1	hello_cargo
2	guessing_game
7	my-project
14	add-one
19	hello_macro, hello_macro_derive

I think dashes are generally preferable over underscores for Cargo package today, so we might want to use dashes for all these packages?

"Is it good practice to call crates “hello-world”, “hello_world” or does it not matter?"

The - to _ thing didn’t always exist, so you’ll see a lot of earlier projects use _. The convention is generally to use -.

[carols10cents]

Thanks for the suggestion! There are enough crates that use either hyphen or underscore though that I think it's good to get people used to checking which a crate uses. Eventually, I hope that it shouldn't make a difference.