From: Gregory Seidman <gsslist+ruby@...>
Date: 2008-01-02T08:58:37+09:00
Subject: Re: transform hash key from string into symbol

On Wed, Jan 02, 2008 at 08:26:31AM +0900, Old Echo wrote:
> Hello Rubyists,
> When dealing with hashes, I like using symbols for key names instead of
> strings. Is there an easy way to convert hash keys from symbols into
> strings?
> 
> E.g. I'd like to do something like this:
> 
> my_hash = YAML.load_file('my_file.yml')
> => { 'one' => 1, 'two' => 2, 'three' => 3 }
> my_hash.super_cool_hash_key_string_to_sym_transformation #one line of
> code?
> ...
> my_hash
> => { :one => 1, :two => 2, :three => 3 }
> 
> Please display your ninja skills. : )

class Hash
  def symbolize_keys
    replace(inject({}) { |h,(k,v)| h[k.to_sym] = v; h })
  end
end

> Thanks,
> kodama
--Greg