コマンドパターン

command.rb

#: coding: utf-8

class Command
  def initialize()
    @command ||= {}
  end
  
  def register(name, cmd)
    @command[name] = cmd
  end
  
  def exec(name)
    @command[name]
  end
end

def func0()
  puts "func0"
end

def func1()
  puts "func1"
end

def func2()
  puts "func2"
end

def main(argv)
  command = Command.new
  command.register("a", func0)
  command.register("b", func1)
  command.register("c", func2)
  
  command.exec("a")
  command.exec("b")
  command.exec("c")
end

main(ARGV)