From: Ilan Berci <coder68@...>
Date: 2008-01-29T06:31:30+09:00
Subject: Re: Hash Sorting

Nico Ritsche wrote:
> James Tucker wrote:
>> On 28 Jan 2008, at 17:45, Nico Ritsche wrote:
>>>
>>> Any ideas?
>> 
>> hash.to_a.sort
> 
> Tried that, the result is the same, no sorting is happening at all.
> Same as if I just do hash.to_a.

James is correct, the array will be sorted but the hash will remain 
"unsorted".  Hashes are random access unsorted collections.. you can't 
"sort" a hash..

you can however as James suggested, move the elements to a hash and then 
sort the result any way you want..

irb(main):001:0> h = {1=>2,3=>4,5=>6}
=> {5=>6, 1=>2, 3=>4}
irb(main):002:0> h.to_a.sort
=> [[1, 2], [3, 4], [5, 6]]
irb(main):003:0> h.to_a.sort_by {|a,b| b}
=> [[1, 2], [3, 4], [5, 6]]
irb(main):004:0>
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