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

result 

        # ERB.result

(from ruby core)
---
    result(b=new_toplevel)

---

Executes the generated ERB code to produce a completed template,
returning the results of that code.  (See ERB::new for details on how
this process can be affected by *safe_level*.)

*b* accepts a Binding object which is used to set the context of code
evaluation.

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.