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: David Duncan <email@hidden>
- Date: Fri, 24 Feb 2012 09:30:04 -0800
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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