gistfile1.rb

{:title => 'Anchor date:', :result => fields_to_na(try_chain(@selected_band, :anchor_on, :to_au))}

  def fields_to_na(data)
    return 'N/A' if data.blank?
    return yield(data) if block_given?
    data
  end

  def try_chain(object, *methods)
    methods.inject(object) {|o, a| o.send(:try, a) }
  end