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

clear 

        # String.clear

(from ruby core)
---
    clear -> self

---

Removes the contents of `self`:

    s = 'foo' # => "foo"
    s.clear   # => ""

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.