Question

I have a case where I’m declaring an NSMutableArray and then testing it like so:

-(void)whatever {
    NsMutableArray *array;

    for(int i = 0; i < 10; i++) {
        if(array){
            [array release];
        }
        array = [[NsMutableArray alloc] init];
        // Add things to the array and do stuff with those things before starting over
    }
    if ([array count] > 0) {
        // Do something else
    }
}

For some reason the if(array){} is evaluating to YES and it’s trying to release an object that doesn’t exist yet on the first pass through. It also evaluates to YES if I try if(array != nil){}. Is there a better way to test this?

Answer 1

When you declare your array set it to nil:

NSMutableArray *array = nil;

Otherwise you can get junk in the pointer.