From: Joel VanderWerf <vjoel@...>
Date: 2008-10-08T03:11:12+09:00
Subject: [ruby-core:19177] Re: [Feature #615] "with" operator

Pit Capitain wrote:
> Maybe I see it too simplistically, but if all that's wanted in this
> discussion is a possibility to get access to the outer scope, then all
> you have to do is to capture it in a local variable:
> 
>   def with( obj, &blk )
>     obj.instance_eval( &blk )
>   end
> 
>   outer_self = self
>   with "sample" do
>     puts "inner self: #{self.class} #{self}"
>     puts "outer self: #{outer_self.class} #{outer_self}"
>   end
> 
> which results in
> 
>   inner self: String sample
>   outer self: Object main

and in 1.9:

   def with( obj, &blk )
     obj.instance_exec( self,  &blk )
   end

   with "sample" do |outer_self|
     puts "inner self: #{self.class} #{self}"
     puts "outer self: #{outer_self.class} #{outer_self}"
   end

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407