Crate of the Week

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I'd like to nominate literator for crate of the week. A crate for Displaying iterator of things.

In my Rust career, I wrote a lot of custom Display just so I could print out contents of a list with a nice comma-delimited format.

I just found this crate while thinking "but someone has to have written a crate for that already" and searching on lib.rs. And it turns out it does! This crate encapsulates all that mess, and I I'll never have to write the following ever again :sweat_smile: :

        if let Some(first) = iter.next() {
            write!(f, "{first}")?;
        }
        let but_last = iter.len().saturating_sub(1);
        for elem in iter.by_ref().take(but_last) {
            write!(f, ", {elem}")?;
        }
        if let Some(last) = iter.next() {
            write!(f, ", and {last}")?;
        }

I can now just do:

        write!(f, "{}", iter.join_comma_and())