module Fretboards
  module Ext
    module Hash
      
      def deep_merge(other_hash)
        dup.deep_merge!(other_hash)
      end
      
      def deep_merge!(other_hash)
        other_hash.each_pair do |k,v|
          tv = self[k]
          self[k] = tv.is_a?(Hash) && v.is_a?(Hash) ? tv.deep_merge(v) : v
        end
        self
      end
    
    end
  end
end

class Hash
  include Fretboards::Ext::Hash
end