From: Lars Haugseth <ruby-talk@...>
Date: 2012-06-26T17:58:37+09:00
Subject: Re: working with two arrays

On 06/26/2012 05:25 AM, Avdi Grimm wrote:
> On Mon, Jun 25, 2012 at 9:06 PM, skolo pen <lists@ruby-forum.com
> <mailto:lists@ruby-forum.com>> wrote:
>
>     What method could I use to do the following:
>
>     people = ["person1","person2","person3"]
>
>     issue = ["issue1","issue2","issue3","issue4","issue5","issue6"]
>
>     person1 => issue1
>
>     person2 => issue2
>
>     person3 => issue3
>
>     person1 => issue4
>
>     person2 => issue5
>
>     person3 => issue6
>
>
> people.cycle.take(issue.size).zip(issue)

Nice!

> Note that this will produce an array of arrays. A Hash doesn't work for
> this because any given key can only appear once.

Hash[people.each_with_index.map {|p, i|
   [p, i.step(issue.size - 1, people.size).map {|j| issue[j]}]
}]

=> {"person1"=>["issue1", "issue4"],
     "person2"=>["issue2", "issue5"],
     "person3"=>["issue3", "issue6"]}

-- 
Lars Haugseth