From: Yuh-Ruey Chen <maian330@...>
Date: 2008-11-01T03:49:16+09:00
Subject: Re: How to access to local variables in enclosing scopes?

On Oct 31, 1:31 pm, Pit Capitain <pit.capit...@gmail.com> wrote:
> 2008/10/31 Yuh-Ruey Chen <maian...@gmail.com>:
>
> > x = 10
>
> > def foo
> >        # how to access x from here?
> > end
>
> > class Klass
> >        # how to access x from here?
> >        def bar
> >                # how to access x from here?
> >        end
> > end
>
> > And no, I don't want to have to use global variables - that would just
> > be pollution and would be incredibly unwieldy in large projects.
>
> What is the difference between your "local" variable x, which should
> be accessible from everywhere, and a global variable?
>
> Regards,
> Pit

The difference that the local variable doesn't have to be defined in
global scope. Only child scopes should have access to that local
variable.

def foo
	a = 10
	def bar
		# should somehow be able to access a
	end
	bar
end
foo
# here, we should not be able to access foo's a, but if there is
another a in scope, we can access that

Or to put it in Python:

a = 20
def foo():
	a = 10
	def bar():
		print a	# prints 10
	bar()
foo()
print a	# prints 20