Get Some Random Characters From A UUID

```cargo
[dependencies]
uuid = { version = "1.7.0", features = ["v4"] }
```

use uuid::Uuid;

fn main() {
    // must be less than 32. See notes
    let the_string = random_string(32);
    println!("{}", the_string);
}

fn random_string(count: u8) -> String {
    let base = Uuid::new_v4().simple().to_string();
    base.get(0..count.into()).unwrap().to_string()
}

I'm not sure why I did this originally. I think it's becuase I wanted random numbers and letters. I've since made code that does exactly that .

Also, this breaks if you ask for too many characters (see notes). The new code on the other page doesn't have that problem.

- This is not guaranteed to be unique, it's just a way to get a few random characters.

- As noted in the code, trying to get more than 32 characters will crash. Making a version that returns an option can address that if you need it

- This returns a string with numbers and random lower case letters

- It's generated off a UUID, but there's no dashes in it