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Objective C != Operator overloading
12 Oct2009
Yeah I know… ObjC does not overload operators… but I’m so used to this feature, that this is a source if mistakes for me…
Always remember to use compare, isEqual or else!
Here is a snipped to compare dates
#import
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSDate *dateOne = [NSDate date];
sleep(3);
NSDate *dateTwo = [NSDate date];
switch ([dateOne compare:dateTwo]) {
case NSOrderedSame:
NSLog(@"These dates are the same!");
break;
case NSOrderedAscending:
NSLog(@"dateOne is earlier than dateTwo!");
break;
case NSOrderedDescending:
NSLog(@"dateTwo is earlier than dateOne!");
break;
default:
NSLog(@"Bad times. Invalid enum value returned.");
break;
}
[pool release];
return 0;
}
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSDate *dateOne = [NSDate date];
sleep(3);
NSDate *dateTwo = [NSDate date];
switch ([dateOne compare:dateTwo]) {
case NSOrderedSame:
NSLog(@"These dates are the same!");
break;
case NSOrderedAscending:
NSLog(@"dateOne is earlier than dateTwo!");
break;
case NSOrderedDescending:
NSLog(@"dateTwo is earlier than dateOne!");
break;
default:
NSLog(@"Bad times. Invalid enum value returned.");
break;
}
[pool release];
return 0;
}
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- In: ObjectiveC
