bob exercism

gistfile1.rb

class Bob
  def hey(message)
    behaviors = {
      -> {message.nil? || message.strip.empty?} => 'Fine. Be that way!',
      -> {message.upcase == message} => 'Woah, chill out!',
      -> {message[-1].chr == '?'} => 'Sure.'
    }
    behaviors.fetch(behaviors.keys.find(&:call), "Whatever.")
  end
end