Hi --

On Sun, 11 May 2008, 7stud -- wrote:

>  Tim Conner wrote:
> > What is the best way to delete every other value in a ruby array?
> > e.g.
> > %w(a b c d e f g h i j k)
> >
> > becomes => [a c e g i k]
> >
> > thanks
> 
> 
>  letters = ("a".."z").to_a
>  last_index = letters.length - 1
> 
>  results = []
> 
>  0.step(last_index, 2) do |i|
>   results << letters[i]
>  end
> 
>  letters = results
>  p letters

In Ruby 1.9 you can do:

   letters.values_at(*0.step(letters.size-1,2))

using the enumerator returned from step called without a block.


David

-- 
Rails training from David A. Black and Ruby Power and Light:
   INTRO TO RAILS         June 9-12            Berlin
   ADVANCING WITH RAILS   June 16-19           Berlin
   INTRO TO RAILS         June 24-27           London (Skills Matter)
See http://www.rubypal.com for details and updates!