From: nobu.nokada@...
Date: 2003-12-08T17:26:28+09:00
Subject: Re: optparse examples

Hi,

At Fri, 5 Dec 2003 13:32:05 +0900,
Jeff Dickens wrote:
> 
> I have a question about the optparse examples at
> http://docs.meg.nu/local-docs/ruby/optparse/optparse.html
> What does the following do ?
> if (Fixnum === :-)
>   class << vars
>     def inspect
>       "{" + collect {|k,v| ":#{k.id2name}=>#{v.inspect}"}.join(", ") + "}"
>     end
>   end
> end

In older version, ruby didn't have Symbol class and symbols are
just Fixnum.  The code is to show the hash keys as symbols.

> and then this line which is commented out: #opts.variable.each {|sym| puts
> "#{sym} = #{opts.send(sym).inspect}"}Looks like some kind of debug code, but
> I thought if I understood it itshed some light on things in general.

Eariest OptionParser had #variable method, but it has been
abolished long ago.

-- 
Nobu Nakada