Transform Values in a nested hash

hash.rb

class Hash
  def self.transform_values(node,&block)
    if node.class == Hash
      Hash[node.map{|k,v| [k,Hash.transform_values(v, &block)]}]
    else
      block.call(node)
    end
  end

  def transform_values(&block)
    Hash.transform_values(self, &block)
  end
end


#Allows you to transform values in a nested hash
# {:a => 1, :b => {:c => 2}}.transform_values {|val| val + 1}
#=> {:a => 2, :b => {:c => 3}}