From: "Darryl L. Pierce" <mcpierce@...>
Date: 2012-01-20T21:19:39+09:00
Subject: Re: Understanding 'require'

On 01/18/2012 06:45 PM, Doug Jolley wrote:
> I am clearly missing something WRT 'require'. I have a program file
> (test1) which requires another file (test1a). My content, etc. is shown
> below.  Why doesn't running test1 produce, 'Hello, world!' as output?
> Thanks for any input.
> 
>         ... doug
> 
> $ ls
> test1  test1a.rb
> $ cat test1a.rb
> var1='Hello, world!'
> $ cat test1
> #!/usr/bin/ruby
> 
> require './test1a.rb'
> puts(var1)
> $ ./test1
> ./test1:4: undefined local variable or method `var1' for main:Object
> (NameError)
> $
> 

var1 is not a global variable, but is instead scoped only to the content
of test1a.rb. If you want to output it from test1 then you would need to
declare it as:

$var1='Hello, world!'

The $ makes it global.

-- 
Darryl L. Pierce <mcpierce@gmail.com>
http://mcpierce.multiply.com/
"What do you care what people think, Mr. Feynman?"