A display_superheroes method that accepts an alternative block

display_superheroes_block

Superhero = Struct.new :name, :origin, :nemesis, :nick_name

SuperHeroes = [ 
  Superhero.new("Batman", "Gotham City", "Joker", "Caped Crusader"),
  Superhero.new("Robin", "Gotham City", "Joker", "Boy Wonder"),
  Superhero.new("Superman", "Krypton", "Lex Luthor", "Kal El"),
  Superhero.new("Supergirl", "Krypton", "Bizzaro", "Kara Zor-El") ]

def display_superheroes *superheroes, &block
  superheroes.flatten.each do |hero|
    if block_given?
      yield hero
    else
      puts
      puts hero.inspect
      puts
    end
  end
end

display_superheroes SuperHeroes

display_superheroes SuperHeroes do |superhero|
  puts %Q{
    Name: #{superhero.name},
    Origin: #{superhero.origin},
    Nemesis: #{superhero.nemesis},
    Nickname: #{superhero.nick_name}
  }
end