gistfile1.rb

class MyClass
  def self.blah(opts, &block)
    result = somefunction(opts)
    block.call(result)
  end
end

class YourClass
  def self.blah(opts)
    result = somefunction(opts)
  end
end

myresults = nil
MyClass.blah(opts) do |foo| 
  myresults = foo
end

yourresults = Yourclass.blah(opts)