This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.
# OpenSSL::PKey::DSAError < OpenSSL::PKey::PKeyError (from ruby core) --- Generic exception that is raised if an operation on a DSA PKey fails unexpectedly or in case an instantiation of an instance of DSA fails due to non-conformant input data. ---
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.