From: Martin Martinos <chabotm@...>
Date: 2007-10-03T13:21:50+09:00
Subject: Re: File scope variable

7stud -- wrote:
> Martin Martinos wrote:
>> A
>> variable that I can access in each function of each class but which is
>> private to my .rb file.
>> 
>> Does anybody has a idea?
> 
> Yes.  Don't do it.  That's a horrible idea.  If a method in your class 
> needs a value, pass the value as an argument.


I agree with you on this point, but in some circumstance it would be 
interesting to have file scoped variables.   There are at least one 
built-in variable that is local to the current file and it's the 
__FILE__ variable.  In fact in my require function I would use a local 
variable that tells me what is the current file folder path.  I would 
also use it to localize the path of the binary files that my script 
uses. I don't think in that case its a bad idea since __FILE__ has also 
a file scope.

example:

require 'pathname'
my_path = Pathname.new(__FILE__).realpath.dirname

require my_path +'mylib'

def exec_my_bin()
  `#{my_path + 'bin/mybin'}`
end
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