strutils/
lib.rs

1pub fn is_palindrome(s: &str) -> bool {
2    let cleaned: String = s.chars().filter(|c| c.is_alphanumeric()).collect();
3    let reversed: String = cleaned.chars().rev().collect();
4    cleaned.eq_ignore_ascii_case(&reversed)
5}
6
7pub fn capitalize_first(s: &str) -> String {
8    s.split_whitespace()
9        .map(|word| {
10            let mut chars = word.chars();
11            match chars.next() {
12                None => String::new(),
13                Some(first) => first.to_uppercase().collect::<String>() + chars.as_str(),
14            }
15        })
16        .collect::<Vec<_>>()
17        .join(" ")
18}
19
20#[cfg(test)]
21mod tests {
22    use super::*;
23
24    #[test]
25    fn test_is_palindrome() {
26        assert!(is_palindrome("A man, a plan, a canal, Panama!"));
27    }
28
29    #[test]
30    fn test_capitalize_first() {
31        assert_eq!(capitalize_first("hello world"), "Hello World");
32    }
33}
strutils/lib.rs

strutils/
lib.rs
