From: "Guy N. Hurst" <gnhurst@...>
Date: 2000-10-23T18:43:56+09:00
Subject: [ruby-talk:5780] Re: Some newbye question



ts wrote:
> 
> >>>>> "G" == Guy N Hurst <gnhurst@hurstlinks.com> writes:
> 
>  I see 2 problems with your idea
> 
> G>              block{|a~,b~|
> 
>  if someone has defined a def 'block', it will have a problem no ?
> 

Hmm. Could you explain what you mean more?

> G>                      b # block variable, has value 12
> G>                      a # block variable, has value 24
> 
>  You can't move the block with cut/paste because the value of 'a', and 'b'
> depend of the previous variable 'a' and 'b', no ?
> 

Right.  

> G>                      b = 24
> G>                      a = 36
> 
> G> Could this be implemented?
> 
>  You can perhaps implement a 'let' if you re-use an existing keyword like
>  for example 'do'
> 

Well, the tilde notation implies a 'let', 

{|x,y~| ....}

without having to resort to

{|x, y=y| .... } 


y~ means make an in-block var initialized with local var 'y'.

I think y=y is confusing.


Guy N. Hurst


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