From: Hans Fugal <fugalh@...>
Date: 2006-03-13T07:08:45+09:00
Subject: Re: array element access

Daniel Harple wrote:
> 
> On Mar 12, 2006, at 9:34 PM, Tomas Fischer wrote:
> 
>> Hi,
>>
>> I've got an array a= [1,2,3,4,5,6] and want to access each second
>> element:
>> b=[2,4,6]. How is this done in ruby?
>>
>> I know, that I can use a for-loob and modulo operator, but I think there
>> is a "ruby way" of doing this.
>>
>> Thanks.
>> tomas
>>
>> --Posted via http://www.ruby-forum.com/.
>>
> 
> require 'enumerator'
> a = (1..10).to_a
> p a.enum_for(:each_slice, 2).collect { |m| m[1] } # -> [2, 4, 6, 8, 10]
> 
> -- Daniel
> 
> 

I might do it this way:

map , = (1..10).partition{|i| i%2==0}
map.each {|i| puts a[i]}

or this way

a.each_with_index {|a,i| if i%2 == 0; ... ; end}

Depending on my needs and mood