On 1 September 2015 at 16:33, Elizabeth McGurty <emcgur...@gmail.com> wrote: > Very nice! The all important ||=
Now if I could just convince you of the benefits of inline posting rather than top posting then I would feel my life was worth while after all :) Colin > > > On Tuesday, September 1, 2015 at 11:01:57 AM UTC-4, Colin Law wrote: >> >> On 1 September 2015 at 15:41, Elizabeth McGurty <emcg...@gmail.com> wrote: >> > And I am also super confused as to the notion of 'memorising'. What >> > does >> > that mean? Kids memorise the alphabet and times tables, what does that >> > metaphor mean in terms of Ruby and Ruby on Rails? Memorising is a >> > process of >> > repeatedly iterating through a series that must eventually be held in >> > one's >> > memory. Does Rails have some neural process of educating itself in >> > neural >> > memorising? >> >> The test filter (which is not actually called that of course, it has a >> name meaningful in the context of my application) does a fair amount >> of db lookup, based on the request params, and comes up with a true or >> false answer. My mod is, in the test filter, to test a class variable >> (lets call it @test_answer) and if it is nil then to run the db >> lookups, caculate the answer true or false, save it in @test_answer >> and return that value. If it is not nil then I just return the value. >> The result is that the first time it runs it does the lookup, the >> second time it just returns the answer >> >> In practice that just turns into something like >> def test? >> @test_answer ||= do_the_lookup_and_calcs() >> end >> >> Colin > > -- > 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 rubyonrails-talk+unsubscr...@googlegroups.com. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/c98708d7-9d86-40d9-90e8-2e92085cfb59%40googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. -- 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 rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAL%3D0gLvhy0fJfec5wruSRqgdLOibYd06sZhzR-dT8weYwLkUdA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
