Issue with Program 17.1

[darren]

Hi folks,

I am attempting to run the first program in chapter 17.  However, the values for the retain counts appear to be off:

2011-08-01 00:35:16.004 Learnin[16956:707] myInt retain count = 7fffffffffffffff
2011-08-01 00:35:16.005 Learnin[16956:707] after adding to array = 7fffffffffffffff
2011-08-01 00:35:16.006 Learnin[16956:707] after assignment to myInt2 = 7fffffffffffffff
2011-08-01 00:35:16.007 Learnin[16956:707] myInt after retain = 7fffffffffffffff
2011-08-01 00:35:16.007 Learnin[16956:707] myInt2 after retain = 7fffffffffffffff
2011-08-01 00:35:16.008 Learnin[16956:707] myInt after release = 7fffffffffffffff
2011-08-01 00:35:16.008 Learnin[16956:707] after removal from array = 7fffffffffffffff

I am running this on a recent MacBook Pro with Lion, so I am guessing this is a 64bit issue of some kind.  What would be the proper way to print these out?

Also, I think there is a typo in the creation of the NSNumber object:

    NSNumber *myInt = [[NSNumber alloc: initWithInteger: 100];

Shouldn't that be:

    NSNumber *myInt = [NSNumber numberWithInt: 100];

or am I missing something?

Thanks.

[skochan]

Hmm, I just discovered this problem.  It appears as though Apple has made a change to the way retain counts are kept for NSNumber objects.  It looks as though they're all set to that value--meaning they can never be released.  I'll have to make a note of that.

As for your second question, you can do [[NSNumber alloc] initWithInteger: 100] or [NSNumber numberWithInt: 100]

Cheers,

Steve