Method next

src/sliding.rs:363–372

(&mut self)

    type Item = &'a str;

    fn next(&mut self) -> Option<Self::Item> {
        if self.pos + self.winlen - 1 >= self.s.len() {
            return None;
        }

        self.pos += 1;
        // not character but byte
        // https://users.rust-lang.org/t/how-to-get-a-substring-of-a-string/1351/7
        Some(&self.s[(self.pos - 1)..(self.pos - 1 + self.winlen)])
    }
}

/// Creates a sliding window of fixed size over a string.