This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# Symbol.intern (from ruby core) --- sym.to_sym -> sym sym.intern -> sym --- In general, `to_sym` returns the Symbol corresponding to an object. As *sym* is already a symbol, `self` is returned in this case.
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.