cool block passing from girl_friday

ninja.rb

class Ninja
  def initialize(name, &block)
    @name = name
    @move = block
  end

  def attack
    @move.call
  end
end

one = Ninja.new('one') { puts 'karate chop' }
one.attack
# => karate chop


def kick
  puts 'kick'
end

two = Ninja.new('two', &method(:kick))
two.attack
# => kick