From: Rick DeNatale <rick.denatale@...>
Date: 2007-03-23T22:48:53+09:00
Subject: Re: getting a n-th key-value pair from a hash

On 3/23/07, D. Krmpotic <david.krmpotic@gmail.com> wrote:
> Hi!
>
> suppose I have this hash:
>
> data = { "a" => 1, "b" => 2, "c" => 3 }
>
> I'd like to get a random pair from the hash.
>
> so
>
> data.get_pair(data.rand)
>
> should return ["b", 2] for example.
>
> How could this be done? I cannot find any method in the documentation.
>
> Thank You!
>
> david

class Hash

  def random_pair
       to_a[rand(size)]
  end
end

Note that what you asked for here is not getting the n-th pair as your
title suggests.  That's problematical with a hash since hashes have no
defined ordering.

But to get a random key-value pair this should work.
-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/