From: Phlip <phlip2005@...>
Date: 2008-09-21T07:52:06+09:00
Subject: Re: for or each?

Joe W�lfel wrote:

> You can try my test if you like.  I haven't checked it carefully.   
> But it does seem like 'each' is much faster under both ruby 1.86 and  
> ruby 1.9.  The code is below.

I just experimented with 'for' and found it does not reevaluate its header each 
time it runs. That's the only thing that could have explained the time 
difference, so maybe Matz & Co. have simply neglected 'for' while optimizing 
.each, which everyone uses. (Though it's still technically superior; not just an 
/ad populum/ thing...)

Another reason to use .each is your collection-like class might override it to 
do something cool...