From: Pit Capitain <pit@...>
Date: 2005-11-26T06:07:25+09:00
Subject: Re: Faster way to pick the every other array member?

Damphyr schrieb:
> we have [1,2,3,4,5,6,7] and want [2,4,6]
> 
> Is there a way other than
> 
> fields=[1,2,3,4,5,6,7]
> fields.collect!{|f|
>     f if fields.index(f)%2==1
> }.compact!
> 
> And by another way I mean something shorter and more beautiful :).

   fields.values_at(*(0...fields.size).select{|i|i%2==1})

Regards,
Pit