From: Patrick Hurley <phurley@...>
Date: 2005-03-23T00:15:58+09:00
Subject: Re: stepping through arrays simultaneously

I like transpose as well, but FYI there is also the generator library:

require 'generator'
a = [1, 2, 3]
b = ['a', 'b', 'c']
c = [:a, :b, :c]

gen = SyncEnumerator.new(a, b, c)
gen.each {|x, y, z| puts "#{x} #{y} #{z}"

Patrick


On Tue, 22 Mar 2005 12:04:59 +0900, Csaba Henk
<csaba@phony_for_avoiding_spam.org> wrote:
> On 2005-03-22, James Edward Gray II <james@grayproductions.net> wrote:
> >> times = [ '1', '2', '3', '4', '5']
> >> events = [ 'eat', 'sleep', 'eat', 'play', 'sleep' ]
> >>
> >> times.size.times { |cnt|
> >>   puts times[cnt] + ": " + events[cnt]
> >> }
> > Sure is.  You want Array#zip().
> 
> There is also Array#transpose:
> 
> [times, events].transpose.each { |t,e|
>   puts t + ":" + e
> }
> 
> Or maybe:
> 
> [times, events].transpose.each { |te|
>   puts te.join(":")
> }
> 
> Csaba
> 
>