From: Abder-rahman Ali <abder.rahman.ali@...>
Date: 2010-07-13T00:43:01+09:00
Subject: Re: Arrays and Hashes

Gavin Kistner wrote:
> On Jul 12, 6:22�am, Abder-rahman Ali <abder.rahman....@gmail.com>
> wrote:
>> Unlike arrays, the items in a hash are not kept in a specific order.
> 
> Note that this is no longer true in Ruby 1.9. Insertion order,
> including initialization, is maintained for Hashes:
> 
> 
> Slim2:~ phrogz$ irb --simple-prompt
>>> h = { a:1, z:7 }
> => {:a=>1, :z=>7}
>>> h[:f] = 14; h[:b] = 99
> => 99
>>> h['last'] = "this one"
> => "this one"
>>> h[-1] = "really last"
> => "really last"
>>> h.each{ |k,v| p [k,v] }
> [:a, 1]
> [:z, 7]
> [:f, 14]
> [:b, 99]
> ["last", "this one"]
> [-1, "really last"]
> => {:a=>1, :z=>7, :f=>14, :b=>99, "last"=>"this one", -1=>"really
> last"}
>>> h.keys
> => [:a, :z, :f, :b, "last", -1]

Thanks a lot Gavin.

I may not getting your point clear. What is it not applicable to Ruby 
1.9 from what Jake said?


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