From: ara.t.howard@...
Date: 2007-02-02T03:38:48+09:00
Subject: Re: skim Array two by two

On Fri, 2 Feb 2007, Mickael Faivre-Macon wrote:

> Hi,
>
> Is it possible to get 2 elements at once ?
>
> [1,2,3,4].each {|a,b| puts a;puts b;puts 'x'}
> produces
> 1,
> nil
> x
> 2
> nil
> x
> 3
> nil
> x
> 4
> nil
> x
>
> I'd like to get
>
> 1
> 2
> x
> 3
> 4
> x
>
> Thanks !

harp:~ > cat a.rb
require 'enumerator'

puts
%w( a b c d e ).each_cons(2){|x,y| p [x,y]}

puts
%w( a b c d e ).each_slice(2){|x,y| p [x,y]}
harp:~ > ruby a.rb

["a", "b"]
["b", "c"]
["c", "d"]
["d", "e"]

["a", "b"]
["c", "d"]
["e", nil]


-a
-- 
we can deny everything, except that we have the possibility of being better.
simply reflect on that.
- the dalai lama