From: Martin DeMello <martindemello@...>
Date: 2006-08-06T06:12:53+09:00
Subject: Re: Iterating over an array n element at a time

On 8/6/06, Trans <transfire@gmail.com> wrote:
> But why not have Ruby fill those arguments out automatically? This
> already does:
>
>   a = [[1,1,1],[2,2,2],[3,3,3]]
>   a.each { |x,y,z| print x,y,z,"\n" }
>
> So couldn't some "slurping" indicator be used?
>
>   a = [1,1,1,2,2,2,3,3,3]
>   a.each { |(x,y,z)| print x,y,z,"\n" }
>
> Or something.

require 'enumerator'

module Enumerable
  def eachn(&block)
    n = block.arity
    each_slice(n) {|i| block.call(*i)}
  end
end

a = (1..10).to_a
a.eachn {|x,y,z| p [x,y,z]}

martin