Recursive symbolize keys

hash.rb

require 'active_support/core_ext'

class Hash
  
  def recursive_symbolize_keys!
    symbolize_keys!
    values.each do |h|
      case h
      when Array
        h.each{|vv| vv.recursive_symbolize_keys! if Hash === vv }
      when Hash
        h.recursive_symbolize_keys!
      end
    end
    self
  end
  
end

I've re-googled this one a few too many times. I'll remember where this is now. This is a cleanup/mix of several ideas found here