gistfile1.rb

class MyDumbPresenter
  attr_accessor :the_thing, :something
  attr_writer :the_rest
  
  def initialize(*all_the_things)
    self.the_thing, self.something, self.the_rest = all_the_things
  end
  
  def has_the_thing?
    if the_thing.present?
      yield the_thing
    end
  end
  
  def with_something
    if something.present?
      yield
    end
  end
  
  def the_rest
    @the_rest.each do |one|
      yield one
    end
  end
end

#content
  - presenter.has_the_thing? do |thing|
    %span.thing
      = thing
  
  - presenter.with_something do
    %span.something
       = presenter.something
       
  %ul
  - presenter.the_rest do |el|
    %li= el