I want to do something ordered hash with ruby.

Ruby wanted to deal with the Map data structure implemented in the tree structure.Are there any classes that meet the following requirements?Do you have any libraries implemented?

You can store values with
• h.set(key,value) and get them with h.get(key).They can run below O(log(N))
In
• h.find_sup(key), a minimum key larger than key and a corresponding pair of values can be obtained.It can be done with O(log(N))