David Vallner <david / vallner.net> wrote:

> If the above pattern doesn't cover what you need, you can always create more
> factory methods to crunch for example the old structure into one the 
> constructor will like better.

yes, that's another solution. I'll think about your above solution
(options hash) because i don't like the way i've done that actually
mostly because, i, my case, the #initialize is more orl es a fake
initialise : it returns somehow an empty object.
> >
> > suppose now, in the live of this app, i'll add some new attributes to
> > the class Preferences, what is the behaviour of yaml in that case ?
> >
> > i suppose the new attributes (if an instance of Preferences is loaded
> > from older attributes list) will be nill ?
> 
> Yes, the YAML loader doesn't know anything about what instance attributes the
> object is supposed to have. AFAIK, it uses Object::allocate to create a blank
> instance of the class, then populates the instance variables via 
> Object#instance_variable_set, or something equivalent.

OK, thanks for all.
-- 
une bue