"Sean Chittenden" <sean / chittenden.org> wrote
....
> I have a class that will have many objects and each object has a
> rather expensive regexp that I don't want to recompile every instance.
> I was hoping to do something similar to:
>
> if @@httpd_combined_entry_re.nil?
>   @@httpd_combined_entry_re = Regexp.new('some regexp string')
> end

I am guessing you want

if defined?(@@httpd_combined_entry_re)
    ...

/Christoph