Re: Can an NSArray ever have a count of -1?
Re: Can an NSArray ever have a count of -1?
- Subject: Re: Can an NSArray ever have a count of -1?
- From: Marco S Hyman <email@hidden>
- Date: Fri, 19 Feb 2016 15:46:04 -0800
>> On Feb 19, 2016, at 4:29 PM, Jens Alfke <email@hidden> wrote:
>>
>> NSInteger is a typedef of ‘long’ in 64-bit, and ‘int’ in 32-bit.
>> You’re correct that %d should be used for NSInteger in 32-bit.
>
> The recommended way to use an NSInteger, as per Apple documentation, is to use %ld and explicitly cast it to long.
>
> NSLog(@“foo is %ld”, (long)foo);
>
> This will work regardless of platform.
>
> For NSUInteger, you use %lu and cast to unsigned long.
This was posted on the xcode list a while back by Quincey Morris:
"As suggested by Greg Parker on this list a couple of years ago, you can use
%t… (%td, %to, %tu %tx, %tX) for unsigned results
%z… (%zd, %zo, %zu %zx, %zX) for signed results
and these work on NS[U]Integer-sized variables on all platforms and architectures that are supported by Apple (without having to cast the parameters).”
They are documented in (all version I think) of the String Programming Guide.
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