From: dblack@...
Date: 2006-01-04T03:39:48+09:00
Subject: Re: Implicit block parameter?

Hi --

On Wed, 4 Jan 2006, Ross Bamford wrote:

> 	[[1,2,3],[2,3,4],[3,4,5]].each { it.select { it % 2 == 0 } }
>
> (I've not tested that btw but you get the idea). However I guess with that 
> it's also potentially confusing when using the implicit idea, since it has 
> the same magic variable meaning two different things in the same line. I 
> guess in this case I'd probably declare the argument in the select block 
> anyway (as 'i' or something).

That's actually another good argument against "it": you'd be trampling
the outer it with the inner it.  And having to remember to declare the
inner argument to protect it from this really puts the whole thing in
the "added to the language as an afterthought" category.


David

-- 
David A. Black
dblack@wobblini.net

"Ruby for Rails", from Manning Publications, coming April 2006!
http://www.manning.com/books/black