On Sep 12, 2008, at 3:24 PM, Graff wrote:
// create the 2-D array
NSArray *twoD = [NSArray arrayWithObjects:
[NSMutableArray new],
[NSMutableArray new],
[NSMutableArray new],
[NSMutableArray new], nil];
I wrote this quickly without thinking about it. The +new method is
not the correct one to use in this example because it will create an
object with a retain count of 1, which means that it will leak when
the NSArray object is released since the NSArray automatically retains
objects added to it. It's better to use the +array method as follows:
// create the 2-D array
NSArray *twoD = [NSArray arrayWithObjects:
[NSMutableArray array],
[NSMutableArray array],
[NSMutableArray array],
[NSMutableArray array], nil];
This way the NSArray gets NSMutableArray objects with a retain count
of 0 so they will be deallocated when the NSArray is deallocated and
calls release on the objects it contains.
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