Re: !foo vs foo == nil
Re: !foo vs foo == nil
- Subject: Re: !foo vs foo == nil
- From: "mm w" <email@hidden>
- Date: Wed, 20 Aug 2008 16:39:34 -0700
hum (void *)0 is equal to 0 interesting...
type *ptr != type *ptr= NULL
you should also align your knowledge
you failed, you are a lazy pointer
On Wed, Aug 20, 2008 at 4:15 PM, Torsten Curdt <email@hidden> wrote:
>
> On Aug 21, 2008, at 00:30, Filip van der Meeren wrote:
>
>> On 21 Aug 2008, at 00:23, Torsten Curdt wrote:
>>
>>> This question has come up during the last CocoaHeads and no one was
>>> really able to give a definite answer.
>>> Do both expressions really mean the same thing (as nil is not null)?
>>>
>>> if (!foo) {
>>> ...
>>> }
>>>
>>> if (foo == nil) {
>>> ...
>>> }
>>>
>>
>> Just try it out in a small project...
>>
>> Keep in mind that Objective-C is the same as C, and C only checks for
>> numbers within the if() statement...
>> 0 = false, 1 or more = true...
>>
>> nil = 0 so, they mean the same thing...
>
> I guess my questions wasn't phrased correctly. The point was more: is 'nil'
> really the equivalent of 0 or NULL.
>
> There was a common perception that NULL is not really the same as nil. But
> seems like in the end it really is (void*)0.
>
> http://cocoawithlove.com/2008/06/doing-things-in-cocoa-with.html
>
> cheers
> --
> Torsten
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--
-mmw
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