From: Stefan Rusterholz <apeiros@...>
Date: 2007-07-20T01:53:19+09:00
Subject: Re: RCR? Added syntax for chains that possibly return nil

Eugen Minciu wrote:
> <hack>
> class Object
>   alias regular_method_missing method_missing
>   def method_missing(meth)
>     if meth.to_s[0]=='_'[0]
>       return nil
>     else
>       regular_method_missing(meth)
>     end
>   end
> end

Reworked it a bit:
class Object
  alias method_missing_no_underscore method_missing
  def method_missing(m,*a,&b)
    m.to_s[0] == ?_ ? send(m.to_s[1..-1],*a,&b) : 
method_missing_no_underscore(m,*a,&b)
  end
end

class NilClass
  alias method_missing_no_underscore method_missing
  def method_missing(m,*a,&b)
    m.to_s[0] == ?_ ? nil : method_missing_no_underscore(m,*a,&b)
  end
end

while line = gets._chomp
...
end

so ._ simulates -> with that hack. Thanks for the idea. Should check for 
m.to_s != "_", though, since that method is used e.g. with gettext.

Regards
Stefan

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