Why would we put a module inside a class in Ruby?

Question

In Ruby, I see that it can be useful to put classes inside modules for the sake of namespacing. I also see that it\'s possible to put modules inside classes. But I don\'t see wh

Answer 1

I guess it’s really just about using a class as a namespace, which is sometimes just more convenient that putting everything in a module. I’ve never seen that in practice, but it’s perfectly valid Ruby code either way.

The only real-life scenario I can think of is using EventMachine in a class:

class Api
  def initialize
    EM.start_server "0.0.0.0", 8080, Server
  end

  module Server
    def receive_data (data)
      # do stuff
    end
  end
end