ruby - Best way to DRY up code using procs and blocks and/or dynamic methods -

i writing way parse websites, each "scraper" has it's own way gather information, there plenty of common functionality between 2 methods.

differences:

• one scraper uses nokogiri open page via css selectors
• the other scraper uses rss feed gather information

similarities:

• each scraper creates "event" object has following attributes:
  • title
  • date
  • description

if nokogiri scraper, this:

    event_selector = page.css(".div-class")      event_selector.each_with_index |event, index|         date = date.parse(event.text) #code want share     end 

for rss scraper, this

    open(url) |rss|       feed = rss::parser.parse(rss)        feed.items.each |event|         description = sanitize.fragment(event.description)         date = description[/\d{2}-\d{2}-20\d{2}/]         date = date.strptime(date, '%m-%d-%y') #code want share       end     end 

^^ date grabbed via regex description , converted date object via .strptime method

as can see each scraper uses 2 different method calls/ways find date. how abstract information class?

i thinking of this:

class scrape     attr_accessor :scrape_url, :title, :description, :date, :url    def initialize(options = {})    end    def find_date(&block)      # process block??   end 

end

and in each of scraper methods like

scrape = scrape.new date_proc = proc.new {date.parse(event.text)} scrape.find_date(date_proc) 

is right way go problem? in short want have common functionality of 2 website parsers pass desired code instance method of "scrape" class. appreciate tips tackle scenario.

edit: maybe make more sense if want find "date" of event, way find - behavior - or specific code run, different.

you use event builder. this:

class event::builder   def date(raw)     @date = date.strptime(raw, '%m-%d-%y')   end    # ... more setters (title, description) ...    def build     event.new(date: @date, ... more arguments ..)   end end 

and then, inside scraper:

open(url) |rss|   builder = event::builder.new   feed = rss::parser.parse(rss)    feed.items.each |event|     description = sanitize.fragment(event.description)     date = description[/\d{2}-\d{2}-20\d{2}/]     builder.date(date)      # ... set other attributes ...      event = builder.build     # event ...   end end