From: Rob Biedenharn <Rob@...>
Date: 2010-03-23T04:49:43+09:00
Subject: Re: Sorting keys of hash based on value

On Mar 22, 2010, at 2:40 PM, Aldric Giacomoni wrote:

> Riccardo Cecolin wrote:
>>>
>> Do you want keys or the whole hash?
>>
>> irb(main):015:0> hash.keys.sort { |a,b| hash[b][:happy] <=>
>> hash[a][:happy] }
>> => [:c, :a, :b]
>
> Of course.. I was trying to make it too complicated. Thanks!
>

Or the slightly simpler sort_by

hash.keys.sort_by {|k| hast[k][:happy] }

If the hash.size is large, this can be a big performance win, but with  
just three keys, you won't notice any difference.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com