fn remove_non_alphanumeric(s: &str) -> String {
s.chars().filter(|c| c.is_alphanumeric()).collect()
}
fn main() {
let s = "Rust, #@ ! ^&Programming (*).";
let cleaned = remove_non_alphanumeric(&s);
println!("{}", cleaned);
}
/*
run:
RustProgramming
*/