dave on Nostr: fn common_char(str1: &str, str2: &str) -> Vec<char> { let mut common_chars = vec![]; ...

fn common_char(str1: &str, str2: &str) -> Vec<char> {
let mut common_chars = vec![];
for ch1 in str1.chars() {
if str2.contains(ch1) {
common_chars.push(ch1);
}
}
common_chars
}