tiberius 0.12.3

A TDS (MSSQL) driver
Documentation 
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use std::fmt::{Display, Write};

pub(crate) trait IteratorJoin {
    fn join(self, sep: &str) -> String;
}

impl<T, I> IteratorJoin for T
where
    T: Iterator<Item = I>,
    I: Display,
{
    fn join(mut self, sep: &str) -> String {
        let (lower_bound, _) = self.size_hint();
        let mut out = String::with_capacity(sep.len() * lower_bound);

        if let Some(first_item) = self.next() {
            write!(out, "{}", first_item).unwrap();
        }

        for item in self {
            out.push_str(sep);
            write!(out, "{}", item).unwrap();
        }

        out
    }
}