I want do do something like this class MyClass def default self.default end def self.default return @@default if @@default self.default = 'this' end def self.default=(value) @@default = value end end a = MyClass.new => nil a.default => "this" But, this does not work. What is the idiom to get this to happen?
on 2009-06-02 22:31
on 2009-06-02 23:14
On Jun 2, 9:31 pm, James Byrne <rails-mailing-l...@andreas-s.net> wrote: > I want do do something like this > > class MyClass > > def default > self.default > end this creates an infinite recursion - self.default doesn't call the class method, it's equivalent to writing def default default end which obviously doesn't work. You could write def default MyClass.default end or, equivalently def default self.class.default end the code as is won't quite work, since ruby will complain if you try to access an unset class variable, so you need some thing like class MyClass @@default = 'this ... end @@ variables are visible by instances as well as classes though, so you could also do def default @@default end Lastly, active support already includes the cattr_accessor helper that will create accessors for you Fred
on 2009-06-03 16:03
Frederick Cheung wrote: > Lastly, active support already includes the cattr_accessor helper that > will create accessors for you > Ahh, I had run across this before but I could not remember what it was called or where it was found. Thanks for the lucid explanation about the rest of it as well. Regards,
on 2009-06-03 21:28
I found this subject well explained in this rather enlightening post attributed to DHH: http://groups.google.com/group/rubyonrails-talk/br...