figyel_grrs_0001/lib.rs
/// find a match for a pattern in content and write to a data stream
pub fn find_matches(content: &str, pattern: &str, mut writer: impl std::io::Write) {
for line in content.lines() {
if line.contains(pattern) {
let result = writeln!(writer, "{}", line);
match result {
Ok(message) => { message }
Err(error) => { println!("Oh noes: {}", error); }
}
}
}
}