From: "Iñaki Baz Castillo" Date: 2011-06-09T07:47:02+09:00 Subject: Where is the #hash method defined? Hi, any object in Ruby has the method #hash which returns an integer unique for the object (such value doesn't change during the lifetime of the Ruby process). I cannot find which class or module #hash method belongs to. I expected it could be in Object class, but it's not. Where is it? Thanks a lot. -- Iñaki Baz Castillo