From: brabuhr@...
Date: 2008-12-31T06:26:26+09:00
Subject: Re: Ruby Noobie needs some help

On Tue, Dec 30, 2008 at 3:49 PM, r <rt8396@gmail.com> wrote:
> Hello,
> I am coming from the python world and trying to learn ruby. Why does
> this throw an error?
>
> #testscript.rb
> cams = ['cam1', 'cam2', 'cam3']
> def function(s)
>    puts s
>    for x in cams
>        print x
>    end
> end
> test()

Two problems:
  * test() is not defined anywhere?
  * The variables named "cams" in the function definition and outside
of it are local variables in different scopes.  One option would be to
use an instance variable (@cams):

@cams = %w{ cam1 cam2 cam3 }
def function(s)
  puts s
  for x in @cams
    print x
  end
end
function("foo")
#=> "foo\ncam1cam2cam3"