From: Navindra Umanee <navindra@...>
Date: 2005-02-05T07:18:53+09:00
Subject: Re: iteration the ruby way

John Wilger <johnwilger@gmail.com> wrote:
> > I have a question about The Ruby Way.  Pickaxe gives the following
> > example for using iterators in Ruby:
> > 
> > a = [ "a", "b", "c" ]
> > a.each {|x| print x, " -- " }
> > 
> > This outputs:
> > 
> > a -- b -- c --
> > 
> > But what if I want to print "a -- b -- c"?  What's the proper Ruby way
> > of doing that?
> 
> a = ["a","b","c"]
> puts a.join(' - ')

I guess I over-simplified.  I really want to do computations based on
each element and compute my output.  However, it's slightly different
for the last element.  I would like to detect the last element in the
iteration.

For example:

     bottom_items.each{ |item|
        do_something_with(item[0], item[1], item[2])
	if_not_last_item_do_this    
     }

Thanks,
Navin.