Re: Why does NSArray count return NSUInteger?
Re: Why does NSArray count return NSUInteger?
- Subject: Re: Why does NSArray count return NSUInteger?
- From: "email@hidden" <email@hidden>
- Date: Mon, 30 May 2011 14:37:38 -0700
Maybe this will assuage your outrage (excuse the lame programmer poetry):
If you were to look at the apis for NSArray and see that indices are signed integers, you could reasonably conclude that storing/retrieving an object from a negative index is a legitimate thing to do. That would maybe be a fun capability, but then it raises questions like is the array zero-based or what? Etc.
Starting to make more sense?
_murat
On May 30, 2011, at 2:10 PM, julius wrote:
>
> On 30 May 2011, at 21:56, Dave Zarzycki wrote:
>
>> On May 30, 2011, at 1:45 PM, julius wrote:
>>
>>>
>>> On 30 May 2011, at 20:03,Quincey Morris wrote
>>>>
>>>> On May 30, 2011, at 08:27, julius wrote:
>>>>
>>>>> All I had hoped was that someone on this list might illuminate the issue more than has happened so far.
>>>>
>>>> The problem isn't really lack of illumination, but that you're not prepared to accept the consequences of the explanation.
>>>
>>> Hilarity and riot.
>>>
>>>>
>>>> Here's my version of the illumination:
>>>>
>>> snip
>>>> -- It at least theoretically provides opportunities for compile-type (== better) error messages if you accidentally pass a value of the wrong type.
>>>>
>>>> -- It at least theoretically eliminates the need to code some range validation checks.
>>>>
>>>
>>> Here is a nice instance that I think quite germane.
>>>
>>> The input parameter to NSArray's objectAtIndex: is an NSUInteger.
>>> Both these code snippets work perfectly (they retrieve element 3).
>>> zStr = [zAry objectAtIndex:3.1];
>>> and
>>> CGFloat zF1 = 3.2;
>>> zStr = [zAry objectAtIndex:zF1];
>>>
>>> I'm sure that by setting the right flags one could get warning messages to appear.
>>
>>
>> Julius,
>>
>> As others have pointed out, this has nothing to do with Objective-C or Cocoa.
>
> NSArray and its count method has nothing to do with Cocoa?
>
>
> I'm off to save a few sheep off the Antrim coast.
>
> Julius
>
>
> http://juliuspaintings.co.uk
>
>
>
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