From: Martin DeMello <martindemello@...>
Date: 2005-12-07T18:47:34+09:00
Subject: Re: increasing counter whithin loop?

Patrick Gundlach <clr8.10.randomuser@spamgourmet.com> wrote:
> Hello again,
> 
> 
> thanks for the answers. I have been very unclear what I wanted, but
> Malte, Guy and JEGII seemed to have read my mind.
> 
> a=%w( a b b d b e )
> 
> a.each_with_index do |x, i|
>   next if x == "b" and a[i - 1] == "b"
>   if x=="b" and a[i+1]=="b"
>     puts "double b"
>   else
>     puts x
>   end
> end

I'd use Gary Watson's method, and cache the last seen element, rather
than rely upon the index (e.g. if you use a stream rather than an array,
you no longer have access to a[i-i]).

martin