From: "Mauricio Fernández" <batsman.geo@...>
Date: 2002-10-08T19:02:05+09:00
Subject: Re: Specifying local and external block parameters (that old chestnut)

On Tue, Oct 08, 2002 at 06:38:53PM +0900, Yukihiro Matsumoto wrote:
> Hi,
> 
> In message "Re: Specifying local and external block parameters (that old chestnut)"
>     on 02/10/08, Mauricio Fern�ndez <batsman.geo@yahoo.com> writes:
> 
> |i = 0
> |x = 'some value'
> |(0...10).each do |i|
> | x := 'surprise!' if i == 2
> | x = i # uses local after the := is run
> |end
> |
> |x => 1
> |
> |Having 'x = ...' meaning completely different things depending on the
> |"execution context" makes me feel unsecure.
> 
> They are not "completely different".  Think about the following C
> code:
> 
>   int foo() {
>     int a
>     a = 42;
>     printf("a=%d\n", a);
>     {
>       int a;
>       a = 55
>       printf("a=%d\n", a);
>     }
>     printf("a=%d again\n", a);
>   }

My concern is about the code meaning different things in _each iteration_; 
I'd expect the code in a for loop to always behave the same.
 
> This is somewhat confusing but completely valid code in C.  Besides,
> in (future) Ruby, you will be warned for a bad style.
> 
> 							matz.

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