Insert-ordered hash tables are a little less unique now. Ruby 1.9+ has them (with the built-in Hash), though it was introduced quietly and not a lot of people s

Insert-ordered hash tables are a little less unique now. Ruby 1.9+ has them (with the built-in Hash), though it was introduced quietly and not a lot of people seem to know that. It's a surprisingly useful data structure sometimes. I'm not sure if conflating three major kinds of data structures into one was a great decision, though. Honestly the OP's weirdness is much less likely to be important than the mixed-integer/string key weirdnesses you're more likely to run into.