Re: question about informal protocols
Re: question about informal protocols
- Subject: Re: question about informal protocols
- From: Jens Alfke <email@hidden>
- Date: Fri, 20 Nov 2009 12:22:48 -0800
On Nov 20, 2009, at 12:09 PM, Michael de Haan wrote:
> Does the, in your opinion, "optional" addition pretty much replace categories as a whole, or is there still a role for them?
It replaces informal protocols. There are many other uses for categories, like
* Breaking a class implementation across several source files
* Declaring private/internal class methods that a few other classes are allowed to call
* Declaring some of a class's methods in other headers (ones that only make sense in the context of that other header)
* Adding methods to a pre-existing framework class
—Jens_______________________________________________
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