From: Eugene Ventimiglia <eventi@...>
Date: 2001-03-01T01:51:49+09:00
Subject: [ruby-talk:11783] Re: How do I reach members from a Proc?

One more thing:
  How do I pass parameters to @action?  Code's modified below

  class Hello
   def install(&p)
    @action=p
   end
   def do(thing)

#   @action.call(thing)

?     instance_eval(&@action) #????

   end
   def help(frotz)
    puts "in help" + frotz.to_s
   end
  end
  
  h=Hello.new
  h.install {|frump|
   puts "in proc" + frump.to_s
   help
  }
  h.do("fish")
 
 
> 'instance_eval' effectively evaluates the block in the context of its
> receiver (in this case 'h'). Without it, the block is run in it's
> original context.
> 
> (http://www.rubycentral.com/book/ref_c_object.html#instance_eval)
> 
> 
> Regards
> 
> 
> 
> Dave
>