From: "Brian Schröder" <ruby@...>
Date: 2004-12-05T05:20:42+09:00
Subject: Re: Using yield

On Sat, 4 Dec 2004 09:32:39 +0900
"Joe Van Dyk" <joe.vandyk@boeing.com> wrote:

> I come from a heavy C++ background, discovered Ruby a few months ago and
> love it.
> 
> I've found that using blocks is a very natural thing.  However, I have not
> once used 'yield'.  I'm sure that there are events when using yield would be
> helpful, but I have no clue when it would be appropriate to use.
> 
> Thoughts?  When do you use the 'yield' statement in code?
> 
> Joe

Yield is just a shortcut for block.call. 

If I am Lazy, and I don't need to pass the block further I use yield. But I
believe that normally using block.call is more explicit and therefore
preferable. 

It may be the case that block.call has a small performance penalty compared
with yield because the block needs to get bound to a variable and therefore be
turned into an object.

Regards,

Brian


-- 
Brian Schr�der
http://ruby.brian-schroeder.de/quiz/crossword/     (Spoiler)