From: James Edward Gray II <james@...>
Date: 2007-04-29T04:49:46+09:00
Subject: Re: Output A File w/ Line Numbers?

On Apr 28, 2007, at 12:05 PM, John Joyce wrote:

> So let me see if I got this close to straight:
> each_with_index is like each in that it alows you to iterate  
> through the array, but additionally hands over a counter that is  
> also incremented?!

Right.

> If this is the deal, then I'm gonna have to go to rehab because of  
> that method. How useful it will be. I think for the last week I've  
> been wanting exactly that in more places than I can think of.

Just be careful.  In my experience the need for and index is often a  
hint that you haven't yet found the Ruby way to approach the  
problem.  That's not always true, but often.

> Where I had been building iterating blocks with some externally  
> initialized counter.

See the standard generator library for doing this without a counter.

James Edward Gray II