Methods to help turn all hash keys into symbols

symbolize_keys.rb

class Hash
  def symbolize_keys
    replace( keys.inject({}) { |new_hash,key| new_hash[key.to_sym] = self[key]; new_hash } )
  end

  def symbolize_keys!
    symbolized_hash = keys.inject({}) do |new_hash,key|
      new_hash[key.to_sym] = self[key]
      new_hash[key.to_sym].symbolize_keys! if new_hash[key.to_sym].respond_to? :symbolize_keys!
      new_hash
    end
    self.replace( symbolized_hash )
  end
end