From: Jeff Wood <jeff.darklight@...>
Date: 2005-08-05T17:00:04+09:00
Subject: Re: new block notation (was: Re: ruby-dev summary 26468-26661)

matz,

I haven't heard any comment from you on the with do and the def with style 

hash.each with a,b do
  #blah
end

or

def foo with a,b
  #blah
end

j.

On 8/4/05, Yukihiro Matsumoto <matz@ruby-lang.org> wrote:
> Hi,
> 
> In message "Re: new block notation (was: Re: ruby-dev summary 26468-26661)"
>     on Fri, 5 Aug 2005 11:44:23 +0900, Florian Gro� <florgro@gmail.com> writes:
> 
> |This is probably the wrong place to ask, but is there resources that
> |explain the evolution of Ruby's design in detail? It is something that I
> |find very interesting.
> 
> I don't think so.  Google on ruby-talk may give you some information.
> Or, ask me.  I will answer you, if I could have some spare time.
> 
> |I think that the check is not strictly necessary in blocks. I guess it
> |could be argued about if it is necessary to have it for lambdas.
> |
> |Or can we just add the check to all blocks and lambdas? This would mean
> |that multiple assignment semantics are totally gone and that [1, 2,
> |3].each_with_index { |x| p x } would no longer work which might be a
> |good thing, anyway.
> |
> |Ignoring values has been troublesome even with multiple assignment
> |because of the array assignment effect anyway.
> 
> Don't misunderstand me.  Blocks will remain blocks.  I just want to
> make lambdas real anonymous functions.  Current lambdas are sort of
> "faked anonymous functions" mostly due to its handling of arguments
> (and local-exit).
> 
> |Here's another try to come up with an alternative:
> |
> |[1, 2, 3].inject { |a| a } # => 1
> |[1, 2, 3].inject { |*a| a } # => [[1, 2], 3]
> |I think both would eventually not produce warnings. The first could
> |still emit a warning for a short period to get users used to the change.
> 
> Again, this issue is not related to block behavior.
> 
>                                                         matz.
> 
> 


-- 
"So long, and thanks for all the fish"

Jeff Wood