From: nobu@...
Date: 2006-08-06T20:41:09+09:00
Subject: Re: Iterating over an array n element at a time

Hi,

At Sun, 6 Aug 2006 19:55:37 +0900,
Trans wrote in [ruby-talk:206591]:
>   [1,1,2,2,3,4].select { |slide(a,b)|  a == b }
> 
> Otherwise you need a select_slice, select_cons, collect_slice,
> collect_cons, and so on.

Longer a little, but it's possible with enumerator.

  [1,1,2,2,3,4].enum_cons(2).select {|a, b| a == b}

-- 
Nobu Nakada