From: Jano Svitok <jan.svitok@...>
Date: 2007-08-08T22:44:42+09:00
Subject: Re: Iterating list in pairs

On 8/8/07, FireAphis <FireAphis@gmail.com> wrote:
> Hello,
>
> I need to iterate through a list and handle two elements on every
> iteration. That is I'd like to do something like
>
> [1,2,3,4,5].each { |x, y| puts x.to_s + y.to_s }
>
> 12
> 23
> 34
> 45
>
> This code doesn't work off course.
> I can iterate using indices
>
> 0.upto(list.size-1) { |i| puts list[i] + list[i+1] }
>
> But it looks ugly to me. Do you know any elegant tricks that don't use
> list indices?
>
> Thanks
> FireAphis

Enumerable#each_slice(n) {|...| ...}