Group lines of text into paragraphs

split_paragraphs.rs

use itertools::Itertools;

pub fn split_paragraphs(lines: &Vec<&str>) -> Vec<String> {
    let mut paragraphs: Vec<String> = vec![];
    for (key, group) in &lines.into_iter().group_by(|x| !x.is_empty()) {
        if key {
            paragraphs.push(group.map(|s: &&str| *s).collect::<Vec<&str>>().join(" "));
        }
    }
    paragraphs
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn split_paragraphs_1() {
        let lines: Vec<&str> = vec![
            "asdasd asd", "zxc zxc", "",
            "qwe qwe", "ert ert", "ty ty", "",
            "sdf sdf", "iopio",
        ];
        let paragraphs: Vec<String> = split_paragraphs(&lines);
        assert_eq!(paragraphs.len(), 3);
        assert_eq!(paragraphs[0], lines[..2].to_vec().join(" "));
    }
}