From: "David A. Black" <dblack@...>
Date: 2005-10-14T07:54:50+09:00
Subject: Re: Default argument values for blocks

Hi --

On Fri, 14 Oct 2005, Trans wrote:

>> This one was proposed long ago as a way to declare a var whose scope is
>> outside the block:
>>
>> lambda { <foo = 1|2> puts foo }
>
> All sorts of things can work, one that looks quite nice:
>
>  lambda { foo = 1|2 -> puts foo }
>
> But I would suggest that everyone give the -> () {} notation chance. I
> really hated it at first too, but it has grown on me and I am starting
> to like it even more then goal posts b/c of the way it brings the
> parameters outside of the block.

That's one of the things I don't like about it.  Just on a kind of
visceral level, { ... } conveys a much greater sense of a "closure".

Actually, if we must have -> then it would be better to just make it
look more like a method definition, but anonymous:

   def x(a,b)
     ...
   end

   -> (a,b)
     ...
   end

and just forget about the {}.  ->(){} just requires too much visual
parsing and explaining.


David

-- 
David A. Black
dblack@wobblini.net