hash keys now unordered ruby 1.9 irb(main):001:0> {:a=>“a”, :c=>“c”, :b=>“b”}=> {:a=>“a”, :c=>“c”, :b=>“b”} ruby 1.8.6 irb(main):001:0> {:a=>“a”, :c=>“c”, :b=>“b”}=> {:a=>“a”, :b=>“b”, :c=>“c”} Order is insertion order