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

* 

        # Array.*

(from ruby core)
---
    array * n -> new_array
    array * string_separator -> new_string

---

When non-negative argument Integer `n` is given, returns a new Array
built by concatenating the `n` copies of `self`:
    a = ['x', 'y']
    a * 3 # => ["x", "y", "x", "y", "x", "y"]

When String argument `string_separator` is given, equivalent to
`array.join(string_separator)`:
    [0, [0, 1], {foo: 0}] * ', ' # => "0, 0, 1, {:foo=>0}"

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.