From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2009-12-19T07:15:23+09:00
Subject: Re: loses scope?

On Fri, Dec 18, 2009 at 11:06 PM, Roger Pack <rogerpack2005@gmail.com> wrote:
> Anybody know why this fails?
>
> a = 32
> class A
>  def go
>  a
>  end
> end
> puts A.new.go # raises with "a not defined"
>
> ?

Because both "class" and "def" keywords create a new scope. They are
not closures, they don't see their surrounding scope. Consider this
other way, which doesn't create new scopes:

irb(main):001:0> a = 3
=> 3
irb(main):008:0> Test = Class.new do
irb(main):009:1* define_method(:go) do
irb(main):010:2* puts a
irb(main):011:2> end
irb(main):012:1> end
=> Test
irb(main):013:0> Test.new.go
3
=> nil

Jesus.