From: Paul Harrington <xeno@...>
Date: 2010-08-19T14:00:26+09:00
Subject: Re: Hashes in 1.9 index

Iain Barnett wrote:
> Since hashes in 1.9 retain their insert order, is there a built in way 
> to get values by index as well as key?
> 
> For example:
> h = { a: 17, b: 18, c: 19 }
> 
> puts h[1]
> => 19
> 
> Obviously that can't work, but there may be some other way I haven't 
> found by looking through the docs? At the moment I'm using this:
> 
> class Hash
>     def by_index( n )
>       self.each_with_index { |item, index| break item if index == n }
>     end
> end
> 
> Just wondering.
> 
> Regards,
> Iain

I think the closest to what you want is Hash#to_a

Just like
irb(main):011:0> h = Hash[:a, 1, :b, 2, :c, 3]
=> {:a=>1, :b=>2, :c=>3}
irb(main):012:0> h.to_a[0][1]
=> 1
irb(main):013:0>
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