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

< 

        # Integer.<

(from ruby core)
---
    self < other -> true or false

---

Returns `true` if the value of `self` is less than that of `other`:

      1 < 0              # => false
      1 < 1              # => false
      1 < 2              # => true
      1 < 0.5            # => false
      1 < Rational(1, 2) # => false

    Raises an exception if the comparison cannot be made.

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.