please try http://ruby.railstutorial.org
在 2012年6月27日星期三UTC-7下午12时50分52秒，Ruby-Forum.com User写道：
thanks for the link, i've bought some RoR books to get further info, but--
if you have some websites with some easy to use examples for a beginner
am most welcome to accept them :)
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Hello,
I know in ruby that when you want to find the size of your query say
[1,2,3,4,5,6] would provide 6 as the total size, length, or even count.
When I try to use size, length, or count on my application, I would get
a pretty darn slow performance (takes around 10 seconds to load each
count and I do it twice). Is there another faster way to get the total
size from the postgres query?
I am using this kind of format in database
e.g: table population [id, race id]
table race [id, persons id]
table persons[id, likes]
so if I use "population.race.persons.count" I would get the total size
of the persons in that particular race and population.
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Carlos, I keep going over this url, but I dont see any reference to
version changes here. What am I missing? Thank you.
On Jun 28, 4:39 pm, Carlos Mathiasen <gunmath...@gmail.com> wrote:
> You can see this in rails guides[1]
>
> [1]http://guides.rubyonrails.org
>
> Matt's
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