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

+ 

        # Integer.+

(from ruby core)
---
    self + numeric -> numeric_result

---

Performs addition:

    2 + 2              # => 4
    -2 + 2             # => 0
    -2 + -2            # => -4
    2 + 2.0            # => 4.0
    2 + Rational(2, 1) # => (4/1)
    2 + Complex(2, 0)  # => (4+0i)

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.