From: Trans <transfire@...>
Date: 2005-04-18T09:04:33+09:00
Subject: Re: self


Robert Klemme wrote:
> Btw, I would find something like this useful in the std lib:
>
> class Class
>   def properties(*h)
>     h = h[0] if h.size == 1
>     initial = {}
>
>     h.each do |name, val|
>       attr_accessor name
>       initial[name]=val unless val.nil?
>     end
>
>     unless initial.empty?
>       alias :new_plain :new
>       class<<self;self;end.instance_eval do
>         define_method(:new) do |*a|
>           obj = allocate
>           initial.each {|name, val| obj.send("#{name}=".to_sym, val)}
>           obj.instance_eval { initialize(*a) }
>           obj
>         end
>       end
>     end
>
>     h
>   end
> end

Ubfortunately, I think it is a bit dangerous to mess with #new like
this as a standard practice. Yet I do not see any other way to set the
instance vars. Agree or no?

T.