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[QUOTE="Rob Boellaard, post: 4609724"]
Hi David,

This time I really made the class ;-)

class S

attr_accessor :my_ivar

def self.inherited(c)
c.class_eval {
@my_ivar = self.name
}

end

def initialize
puts "In S initialize, my_ivar = #{@my_ivar}"
super
end

def self.do_something
puts "In S class-method do_something, my_ivar = #{@my_ivar}"
end

end

and,

require "s"

class B < S

def initialize
super
end

def show_my_ivar

puts "In show_my_ivar " + @my_ivar
end

end

when I do B.do_something, @my_ivar is "B" as it should
but if I do B.new, my_ivar is nil

To solve it I can modify initialize like:

def initialize
@my_ivar = self.class.to_s
puts "In S initialize, my_ivar = #{@my_ivar}"
super
end

and
b = B.new
puts b.show_my_ivar

works properly.

But as this is a simplification, in my real app I need a few lines of
code to set @my_ivar, and I 'd rather not have too much duplicate code.

I guess what I am trying for is to configure a variable, using the
name of the subclass, that is readily available to both class methods
and instance methods.

thanks a lot,

Rob
[/QUOTE]

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