Yes, what you are looking at here is a code sample of what is possible with Jackbox closures. You see normally decorators in ruby either suffer from class identity loss or limit the times they can be applied to an object to 1(one) time.
Here a a couple of articles on that: http://nithinbekal.com/posts/ruby-decorators/ http://robots.thoughtbot.com/evaluating-alternative-decorator-implementations-in So with our closures you can apply the same pattern to an object over and over, cup = Coffee.new.enrich milk, sprinkles, sprinkles but the instance remains being what it is. cup.should be_instance_of(Coffee) What's more you can have the class introspect on the decorators it possesses. cup.injectors.should == [:milk, :sprinkles, :sprinkles ] Furthermore you can add new facets to your decorators: user_input = 'extra red sprinkles' sprinkles do define_method :appearance do user_input end end cup.enrich(sprinkles) cup.appearance.should == 'extra red sprinkles' cup.cost.should == 2.25 And then latter: user_input = 'cold milk' milk do define_method :temp do user_input.split.first end end cup.enrich milk cup.temp.should == 'cold' cup.cost.should == 2.55 Decorators are useful in graphical environments including HTML, in steam processing, command processors to name a few. Thank you, kindly. lha -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/7e0e756625f2e7171498dd39299bad80%40ruby-forum.com. For more options, visit https://groups.google.com/d/optout.
