Rails helper for pretty-printing ordered parameters

gistfile1.rb

  # Compile a list of options into an ordered array
  def compile_options(obj, order = [])
    components = []
    order = obj.keys if order.empty?
    order.each { |k| components << obj[k] unless obj[k].blank? }
    components
  end

  # Example: returns "Omaha", "Omaha, Nebraska", or "Nebraska"
  def pretty_location(opts = {})
    opts = {
      :city => '',
      :state => ''
    }.update(opts)

    components = compile_options(opts, [:city, :state]) 
    return components.join(', ') unless components.empty?
    'The Internet'
  end