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Re: Is Apple's singleton sample code correct?
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Re: Is Apple's singleton sample code correct?


  • Subject: Re: Is Apple's singleton sample code correct?
  • From: Uli Kusterer <email@hidden>
  • Date: Sat, 26 Nov 2005 18:43:33 +0100


Am 26.11.2005 um 18:21 schrieb David Gimeno Gost:
+ (MyGizmoClass*) sharedInstance
{
@synchronized( self ) {
if ( sharedGizmoManager == nil ) {
// The extra -retain in +allocWithZone: is needed only when the
// result of [[alloc] init] is assigned to a variable other than
// our static shared instance, so we undo it here.
sharedGizmoManager = [[[self alloc] init] release];
}
}
return sharedGizmoManager;
}

Weren't we trying to make our code safer and more readable? I hope I never end up writing code like


	[[[self alloc] init] release]

in any of my programs. This code effectively does nothing, and its side effects do everything. Yes, the comment elaborates on that, but in this case I'd prefer self-documenting code.

Cheers,
-- M. Uli Kusterer
http://www.zathras.de


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  • Follow-Ups:
    • Re: Is Apple's singleton sample code correct?
      • From: David Gimeno Gost <email@hidden>
References: 
 >Is Apple's singleton sample code correct? (From: David Gimeno Gost <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Shawn Erickson <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: David Gimeno Gost <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: Uli Kusterer <email@hidden>)
 >Re: Is Apple's singleton sample code correct? (From: David Gimeno Gost <email@hidden>)

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