bob.rs

pub fn reply(message: &str) -> &str {
  let chrs          = || message.trim().chars();
  let has_text      = chrs().any(|c| c.is_alphanumeric());
  let has_letters   = chrs().any(|c| c.is_alphabetic());
  let has_lowercase = chrs().any(|c| c.is_alphabetic() && !c.is_uppercase());
  
  if has_letters && has_text && !has_lowercase { "Whoa, chill out!" }
  else if chrs().as_str().ends_with("?") { "Sure." }
  else if !has_text { "Fine. Be that way!" }
  else { "Whatever." }
}