From: Dave Thomas <Dave@...>
Date: 2001-02-28T14:55:38+09:00
Subject: [ruby-talk:11748] Re: How do I reach members from a Proc?

"Eugene Ventimiglia" <eventi@nyic.com> writes:

> Here's a reduced version of what I'm trying to do:


 class Hello
  def install(&p)
   @action=p
  end
  def do
#   @action.call
    instance_eval(&@action) #<<<
  end
  def help
   puts "in help"
  end
 end
 
 h=Hello.new
 h.install {
  puts "in proc"
  help
 }
 h.do


'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