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Re: how to make an object with a single unique instance like NSNull?
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Re: how to make an object with a single unique instance like NSNull?


  • Subject: Re: how to make an object with a single unique instance like NSNull?
  • From: Finlay Dobbie <email@hidden>
  • Date: Tue, 29 Mar 2005 15:48:44 +0100

On Tue, 29 Mar 2005 09:42:22 -0500, Johnny Deadman
<email@hidden> wrote:
> I need to make a version of NSNull for my own purposes (it has to be
> a coredata* object so NSNull won't suffice) but I can't figure out
> NSNull's trick of only having a single unique instance. In other words
>
> [NSNull null]
>
> always returns the same instance of NSNull no matter how many times
> you call it.
>
> How do I do this?

<http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaObjects/Articles/CreateSingleton.html>

 -- Finlay
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 >how to make an object with a single unique instance like NSNull? (From: Johnny Deadman <email@hidden>)

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