rust sample code: splitting array of string on comma and space

 

I'm keeping this code snippet because it isn't going to make it into dust and I think it's impressive.

/**

* Takes an Option<iterable of string> and returns a HashSet of strings that have been

* split by comma and whitespace

*/

fn clean_input<'a, I>(cmd_line_arg: Option<I>) -> HashSet<&'a str>

where

I: Iterator<Item = &'a str>,

{

match cmd_line_arg {

Some(aa) => aa

.map(|a| {

a.split_whitespace()

.map(|bb| bb.split(','))

.flatten()

.collect::<Vec<&str>>()

})

.flatten()

.filter(|a| !a.is_empty())

.collect::<HashSet<&str>>(),

None => HashSet::new(),

}

}