Re: [Obj-C] if (self) vs. if (self != nil)
Re: [Obj-C] if (self) vs. if (self != nil)
- Subject: Re: [Obj-C] if (self) vs. if (self != nil)
- From: Erik Stainsby <email@hidden>
- Date: Fri, 24 Feb 2012 12:26:56 -0800
And what does the list feel about the following form (which I think I picked up from a Wil Shipley article):
if(nil != (self = [super init]))
Myself I find it elegantly brief and imminently readable.
Time Dwarf,
Roaring Guy
On 2012-02-24, at 9:30 AM, David Duncan <email@hidden> wrote:
> On Feb 24, 2012, at 6:50 AM, Oleg Krupnov wrote:
>
>> So basically, nil is of type "void*", so the expression "self != nil"
>> compares two pointers and the result is "boolean", which is perfect
>> for testing in the "if" statement. But the "self" alone is of type
>> "pointer" and so when it is tested by the "if" statement, it's
>> implicitly cast to the type "boolean".
>
> In C any non-zero value is 'true', as such if (self) vs if (self != nil) is a pure stylistic choice, neither is more correct than the other in terms of the language itself.
> --
> David Duncan
>
>
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