Re: Help in 2 Diamensional Array
Re: Help in 2 Diamensional Array
- Subject: Re: Help in 2 Diamensional Array
- From: Andy Lee <email@hidden>
- Date: Sat, 1 Apr 2006 19:43:45 -0500
On Apr 1, 2006, at 12:53 PM, William Bumgarner wrote:
@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding>
- (unsigned)count;
- (id)objectAtIndex:(unsigned)index;
@end
And:
@interface NSMutableArray : NSArray
- (void)addObject:(id)anObject;
- (void)insertObject:(id)anObject atIndex:(unsigned)index;
- (void)removeLastObject;
- (void)removeObjectAtIndex:(unsigned)index;
- (void)replaceObjectAtIndex:(unsigned)index withObject:(id)anObject;
@end
The rest of the implementation on the NSArray and NSMutableArray
classes are implemented entirely in terms of those methods.
[...] In the context of the 2D array, all of the above methods
could be made to do something semi-reasonable in such a context.
When I imagine the API for an Array2D class, the insert and remove
methods don't make sense to have at all -- but I admit I'm jumping to
conclusions about what the OP really needs; there could be all kinds
of reasonable definitions for Array2D. Supporting a couple of odd
methods (especially if you'll never call them directly in practice)
might arguably be worth it to get things like make-perform for free.
Implementing a subclass of NSObject that offers a 2D array of
objects would be straightforward, as well.
If you're just talking about creating a basic data structure with
getters and setters, I think in fact it would be more straightforward
and less error-prone than fitting a 2D API on an NSArray subclass.
Most of the important implementation would not be in the class
cluster methods I'd be implementing; most of it would be in the init
method, where internal storage will be allocated, and in accessor
methods that take two indices instead of one.
--Andy
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden