From: John Sikora <john.sikora@...>
Date: 2009-09-05T02:24:12+09:00
Subject: Re: Is Passing a Binding with Parameters Possible?

Space Ship Traveller wrote:
> I like lmgtfy:
> 
> http://lmgtfy.com/?q=Binding+of_caller
> 
> Kind regards,
> Samuel


SST,

Thanks for the link. No one has ever accused me of being particularly 
adept at conducting a web search.

Unfortunately, I feel even more ignorant because I cannot get the code 
to work. At first I tried adapting the code in my post to use 
Binding.of_caller.  When it did not work, I tried the example code from 
the link:


require 
'c:/Ruby/lib/ruby/gems/1.8/gems/extensions-0.6.0/lib/extensions/binding'

def inc_counter
  Binding.of_caller do |b|
    eval("counter += 1", b)
  end
end

counter = 0
inc_counter
inc_counter
puts counter


I get an error message that says: in 'inc_counter': undefined method '+' 
for nil:NilClass.  So it is not getting the correct binding. Debugging 
shows that Binding.of_caller returned a binding to inc_counter.

The code in the require file matches the source code of of_caller in the 
link, so at least I know that is right.

Is there something obvious am I doing wrong? I am running Ruby 1.8.6 on 
Windows. I will try to educate myself by studying the source code to 
figure out what is wrong, but it will take some time (if I ever get 
there).

Thanks,
John S.
-- 
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