A different way to organize Ruby code

rubyuse.rb

class Ns
  def initialize
    use.each do |pkg, method_names|
      method_names.each do |name|
        self.class.send(:define_method, name) do |*args|
          pkg.method(name).call(*args)
        end
      end
    end
  end
end

module Math
  def self.dec(n) n - 1; end
  def self.inc(n) n + 1; end
end

module Cows
  def self.meh_cow; "Moo." end

  def self.angry_cow
    [meh_cow.slice(0..-2)].
      cycle.
      take(3).
      zip(["! "].cycle).
      flatten.
      join.
      slice(0..-2)
  end
end

# Meanwhile, back at the farm:

class Main < Ns
  def use
    {Math => [:inc],
     Cows => [:meh_cow, :angry_cow]}
  end

  def main
    puts "The meh cow says '#{meh_cow}', the angry cow says '#{angry_cow}', and 1+1 is #{inc 1}!"
  end
end

Main.new.main

I rolled this into a gem that includes the ability to import methods into blocks: https://github.com/alandipert/rns