From: ara.t.howard@...
Date: 2006-08-06T03:15:32+09:00
Subject: Re: Iterating over an array n element at a time

On Sun, 6 Aug 2006, Kim Pedersen wrote:

> Is there an elegant way to iterate over an array n elements at a time?
> e.g. something like...
>
> a = [1,1,1,2,2,2,3,3,3]
>
> a.each(3) do |x,y,z|
>   print x,y,z,"\n"
> end
>
> prints...
> 111
> 222
> 333
>
> //kim

harp:~ > ruby -r enumerator -e'  %w( 1 2 3 4 5 ).each_slice(2){|slice| p slice}  '
["1", "2"]
["3", "4"]
["5"]


harp:~ > ruby -r enumerator -e'  %w( 1 2 3 4 5 ).each_cons(2){|slice| p slice}  '
["1", "2"]
["2", "3"]
["3", "4"]
["4", "5"]


-a
-- 
happiness is not something ready-made.  it comes from your own actions.
- h.h. the 14th dali lama