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

i 

        # Numeric.i

(from ruby core)
---
    i -> complex

---

Returns `Complex(0, self)`:

    2.i              # => (0+2i)
    -2.i             # => (0-2i)
    2.0.i            # => (0+2.0i)
    Rational(1, 2).i # => (0+(1/2)*i)
    Complex(3, 4).i  # Raises NoMethodError.

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.