Objective-C Pocket Reference
by Andy Duncan

This errata page lists errors outstanding in the most recent printing.

If you have technical questions or error reports, you can send them to
booktech@oreilly.com.  Please specify the printing date of your copy.

This page was updated June 18, 2008.

Here's a key to the markup:
	[page-number]: serious technical mistake
	{page-number}: minor technical mistake
	<page-number>: important language/formatting problem
	(page-number): language change or minor formatting problem
	?page-number?: reader question or request for clarification



Confirmed errors:

(10)  Second paragraph, starting "Line 3";
Keyword "ec@class" should be "@class".


[10]  Top of page in line 11 in sample class interface;
Class method declaration in line 11 reads as:

+(void)numCircles;
should be:
+(int)numCircles;


[12]  Middle of page in line 7 of sample class implementation;
Class method implementation in line 7 reads as:

+(void)numCircles { return count; }
should be:
+(int)numCircles { return count; }


(22)  1st paragraph (last line of code);
The last line of the code should be line 10, not 8.


(28)  Code sample at bottom;
Last line of code sample should be numbered 6, not 5. In subsequent discussion,
reference to line 5 should also read line 6.


{56}  First code snippet towards the top of the page;
The code snippet for copyWithZone: has too few left brackets.  There should be 3 instead.  
The following is the corrected code:

- (id) copyWithZone: (NSZone *) zone {
    return [[[self class] allocWithZone:zone] init];
}


(65)Item 5 in the numbered list;
Typo in text:

"Both Object and NSObject provides ..."

should be:

"Both Object and NSObject provide ..."