Document Revision History

This table describes the changes to NSObject Protocol Reference.

2013-01-28Updated isEqual: to note that it should accept a nil argument and return NO in that case.
2012-09-19Added debugDescription.
2012-07-17Updated for OS X V10.8.
2009-11-23Removed use of a deprecated NSString method in an example.
2008-12-22Updated discussion of retainCount method.
2007-07-19Updated definition of release, added a clarification to -hash, and added links to companion documents.
2006-06-28Updated to conform to reference consistency guidelines.
2006-05-23First publication of this content as a separate document.