Re: collections of primitive types

[Chris B. Vetter]

On Fri, 28 Feb 2003 10:26:24 -0800
Travis Griggs <tgriggs@keyww.com> wrote:
[...]
> NSArray looks fine for storing objects. But quite often I want an
> array of floats or ints. What's the general approach? Do I box up the 
> primitive numbers in objects and use NSArray? Is there a FloatArray or
> IntArray thing? Write my own?
[...]

Use categories and methods ala

@implementation NSMutableArray (MyStuff)

- (void) addFloat: (float) value
{
  [self addObject: [NSNumber numberWithFloat: value]];
  return;
}

@end

@implementation NSArray (MyStuff)

- (float) floatAtIndex: (unsigned) index
{
  id
    value = [self objectAtIndex: index];
  
  return ( [value respondsToSelector: @selector(floatValue)]
          ? [value floatValue]
          : 0. );    // probably not the best return value...
}

@end

-- 
Chris