From: "Mauricio Fernández" <batsman.geo@...>
Date: 2002-10-08T19:11:55+09:00
Subject: Re: Specifying local and external block parameters (that old chestnut)

On Tue, Oct 08, 2002 at 06:31:03PM +0900, ts wrote:
> 
>  * at compile time, the lhs is modified (and a block local variable is
>   created) *after* ruby has parsed the rhs
> 
>  * at runtime, ruby first execute the rhs and then make the assignement
>    (i.e. create a new block local variable)
> 
>  This give something similar to a let*
> 
> pigeon% cat b.rb
> #!./ruby
> 2.times do |i|
>    b = i
>    3.times do |i|
>       b := b + i
>       p "in  #{b}"
>    end
>    p "out #{b}"
> end
> 
> pigeon% 
> 
> pigeon% b.rb
> ./b.rb:4: warning: shadowing variable `i'
> ./b.rb:5: warning: shadowing variable `b'
> "in  0"
> "in  1"
> "in  2"
> "out 0"
> "in  1"
> "in  2"
> "in  3"
> "out 1"
> pigeon% 

At first sight, this looks great!

-- 
 _           _                             
| |__   __ _| |_ ___ _ __ ___   __ _ _ __  
| '_ \ / _` | __/ __| '_ ` _ \ / _` | '_ \ 
| |_) | (_| | |_\__ \ | | | | | (_| | | | |
|_.__/ \__,_|\__|___/_| |_| |_|\__,_|_| |_|
	Running Debian GNU/Linux Sid (unstable)
batsman dot geo at yahoo dot com

Q: What's the big deal about rm, I have been deleting stuff for years?  And 
   never lost anything.. oops!
A: ...
	-- From the Frequently Unasked Questions