Re: NSUInteger in for-loop?
Re: NSUInteger in for-loop?
- Subject: Re: NSUInteger in for-loop?
- From: "Clark Cox" <email@hidden>
- Date: Sun, 14 Sep 2008 21:48:12 -0700
On Sun, Sep 14, 2008 at 9:44 PM, Alex Reynolds <email@hidden> wrote:
> The %lu with casting seems to run into the same issue as %u:
>
> ...
> 2008-09-14 21:43:07.241 NSUIntTest[19779:10b] NSUInteger: 2
> 2008-09-14 21:43:07.259 NSUIntTest[19779:10b] NSUInteger: 1
> 2008-09-14 21:43:07.260 NSUIntTest[19779:10b] NSUInteger: 0
> 2008-09-14 21:43:07.261 NSUIntTest[19779:10b] NSUInteger: 4294967295
> 2008-09-14 21:43:07.262 NSUIntTest[19779:10b] NSUInteger: 4294967294
The results will be very different in a 64-bit program :)
The general point is that the NSLog is irrelevant. You are testing
that an unsigned variable is >= 0. An unsigned variable is *always*
>=0 ... it's *unsigned*. This is the reason that your loop isn't
performing to your expectations; it's doing what you said, not what
you meant :).
--
Clark S. Cox III
email@hidden
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