You can use C-type arrays for primitives and (id).

id bob[10];

compiles just fine.

NSArray provides all the *memory management* associated with handling objects in Obj-C so that

NSArray *joe = [NSArray arrayWithContentsOfURL: myURL];

creates all the objects and

[joe release];

removes them all from memory. Otherwise, you’d have to:

for (int i = 0; i < 10; i++) {
[bob[i] release];
}

Hope that helps!

-S!

hhamm: yes, it’s slow. If speed is what you need, NSNumber is out of the question.

Ted: because NSArray auto-retains and auto-releases and does a lot of things which require that whatever you put in there responds to certain protocols (namely those dictated in NSObject).

-Kalle.

Anyone know why?

Thanks

but this seems to be slow, memory intensive and ugly…
how to calc something more complex with that ?

like :

value = value * t + (1-t) * ( sin( value * M_PI) )

value = [NSNumber numberWithFloat:[value floatValue] * t + (1-t) * (sin ( [value floatValue] * M_PI) )];

*phooo* that stinks!

I don’t think it’s possible to write a method as you have shown passing in a “number” as NSNumber is an object and NSInteger is standard C data type (not an object). You could have a method where you pass in an object of type “id” the generic object type and then determine if the object is an NSNumber similar to this:

-(void)reportDataType:(id) number
{
  if ([number isKindOfClass:[NSNumber class]])
    NSLog(@"Is NSNumber");
  ...
}

I wrote about determining class types here: Determining Class Types

Hope that helps.

-(void)reportDataType:number{

if(…) NSLog(@”received NSInteger”);
if(…) NSLog(@”received NSNumber”);

}