Convert hash to struct

class Hash
   def to_struct(struct_name)
      Struct.new(struct_name,*keys).new(*values)
   end
end

if $0 == __FILE__
   h = {:name=>"Dan","age"=>33,"rank"=>"SrA","grade"=>"E4"}

   s = h.to_struct("Foo")

   puts "name: " + s.name
   puts "age: " + s.age.to_s
   puts "rank: " + s.rank
   puts "grade: " + s.grade
end

=begin
Note: An empty string used as a key will cause 1.8 to choke
=end