Justin wrote: > There is a link to "Object#kind_of?" which is an instance method. > Clearly the purpose of the hash mark has another purpose. Anyone know > what document explains this? The notation's explained in the preface: http://www.rubycentral.com/book/preface.html#S10 Basically it means "the instance method kind_of? implemented by the Object class"; not really syntax, but convention for discussing Ruby. The 'ri' utility uses something similar. -- Posted via http://www.ruby-forum.com/.