Function unique

pub fn unique<T: Hash + Eq>(
    it: impl IntoIterator<Item = T>,
) -> Result<impl Iterator<Item = Rc<T>>, Infallible>

Returns an iterator with all duplicates removed.

The sorting order is kept, no extra allocation is performed. However, to make it possible, the data is wrapped inside Rc.

#[derive(Template)]
#[template(ext = "html", source = "{% for elem in example|unique %}{{ elem }},{% endfor %}")]
struct Example<'a> {
    example: Vec<&'a str>,
}

assert_eq!(
    Example { example: vec!["a", "b", "a", "c"] }.to_string(),
    "a,b,c,"
);