This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

flatten!

        # Set.flatten!

(from ruby core)
---
    flatten!()

---

Equivalent to Set#flatten, but replaces the receiver with the
result in place. Returns nil if no modifications were made.



      

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.