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

each 

        # Rake::LinkedList.each

(from gem rake-13.0.6)
### Implementation from LinkedList
---
    each() { |head| ... }

---

For each item in the list.

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.