instance_variable_helpers.rb

module InstanceVariableHelpers
  def set_ivar(type, name, obj)
    instance_variable_set ivar_name(type, name), obj
  end

  def get_ivar(type, name)
    returning instance_variable_get(ivar_name(type, name)) do |obj|
      yield obj if block_given?
    end
  end
  
  private
    def ivar_name(type, name)
      "@#{type}_#{name.gsub(/[ -]/,'_').gsub('&','and')}"
    end
end