From: Gavin Kistner <gavin@...>
Date: 2004-10-10T12:51:14+09:00
Subject: Re: [ANN] Ruby Course 1.0

On Oct 9, 2004, at 12:18 PM, Brian Schr�der wrote:
> [Ruby Course 2004](http://ruby.brian-schroeder.de/course/)

Very nice work, Brian. (I especially like the progress bar at the 
bottom :)

One minor note: on page 18, you say:
"A block is a piece of code, similar to an anonymous function, but it 
does not open a new scope. "

This is incorrect, I think; as a closure, it inherits the previous 
scope, but there certainly is a new scope:

rb(main):01> def echo(s); yield s; end
#=> nil

irb(main):02> foo = 'Hello, '
#=> "Hello, "

irb(main):03> echo(12){ |arg| arg_as_string = arg.to_s; puts foo + 
arg_as_string }
Hello, 12
#=> nil

irb(main):04> arg_as_string
NameError: undefined local variable or method `arg_as_string' for 
main:Object
         from (irb):4