From: Joel VanderWerf <vjoel@...>
Date: 2008-07-07T14:32:13+09:00
Subject: Re: Accessing variables when loading a file to irb

Joel VanderWerf wrote:
> If 
> you need to load files from a program, and keep their instance (not 
> local) variables, constants, and methods in separate scopes, you might 
> be interested in these:
> 
> http://raa.ruby-lang.org/project/script/

Ok, I said no local variables, but it's possible to expose them to the 
caller too, using eval(var_name, binding). So anyway, the 0.3 release of 
the above lets you do the following:


$ cat prog.rb
require 'script'

script = Script.load("my-script.rb")

p eval("x", script.__script_scope)
p script.__local_variable_get(:x)
p script.__local_variables
p script.instance_variables

$ cat my-script.rb
x = 4
require 'my-script-sub'

$ cat my-script-sub.rb
x = 5
y = 6

$ ruby prog.rb
4
4
["__file__", "x"]
["@__script_scope", "@__loaded_features", "@__dir", "@__main_file"]


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