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

shuffle! 

        # Array.shuffle!

(from ruby core)
---
    array.shuffle!(random: Random) -> array

---

Shuffles the elements of `self` in place.
    a = [1, 2, 3] #=> [1, 2, 3]
    a.shuffle!    #=> [2, 3, 1]
    a             #=> [2, 3, 1]

The optional `random` argument will be used as the random number
generator:
    a.shuffle!(random: Random.new(1))  #=> [1, 3, 2]

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.