From: Christoph Rippel <crippel@...>
Date: 2001-01-08T18:10:03+09:00
Subject: [ruby-talk:8836] Re: No :<, :>, etc. methods for Array


"Christoph Rippel" <crippel@primenet.com> wrote in message
news:MGEAJFIIJOCJJJKGKGIJEEIGCKAA.crippel@primenet.com...
> From would you are saying it seems that the container class should
> effectively provide this generic zero. What about something like
>
> class ContainerClass
> ZERO  =  0 # or something similar like the hypothetical Numeric::ZERO
> def   def sum(if_empty = type::ZERO)
> ..
> end
> ...
> end
I guess the ``type::''  prefix is totally unnecessary ... . This makes only
sense
in the context of a  ``SumModule''  to be mixed into a ContainerClass
providing
this missing ZERO (alternatively the ContainerClass could provide a #zero
method.)

Christoph