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

ERB 

        # ERB < Object

(from ruby core)
---

---
# Constants:

NOT_GIVEN
:   [not documented]
VERSION
:   [not documented]


# Class methods:

    new
    version

# Instance methods:

    def_class
    def_method
    def_module
    encoding
    filename
    lineno
    location=
    make_compiler
    new_toplevel
    result
    result_with_hash
    run
    set_eoutvar
    src

# Attributes:

    attr_accessor filename
    attr_accessor lineno
    attr_reader encoding
    attr_reader src

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.