This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Array.<< (from ruby core) --- array << object -> self --- Appends `object` to `self`; returns `self`: a = [:foo, 'bar', 2] a << :baz # => [:foo, "bar", 2, :baz] Appends `object` as one element, even if it is another Array: a = [:foo, 'bar', 2] a1 = a << [3, 4] a1 # => [:foo, "bar", 2, [3, 4]]
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.