Re: Problem using dictionary
Re: Problem using dictionary
- Subject: Re: Problem using dictionary
- From: Quincey Morris <email@hidden>
- Date: Fri, 8 Oct 2010 11:34:34 -0700
On Oct 8, 2010, at 04:47, Remco Poelstra wrote:
> Is there a reason valueForKey: is documented directly but valueForKeyPath: is not?
They're both documented, but it requires familiarity with how to read the Cocoa documentation, which is an important point that goes beyond just this example.
The methods are documented as part of the NSKeyValueCoding protocol here:
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/Reference.html
It's briefly mentioned, in that document and slightly more definitively in:
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/Overview.html
that there's a default implementation of NSKeyValueCoding in NSObject. NSDictionary inherits this behavior from NSObject, but because the default 'valueForKeyPath:' is documented as operating in terms of 'valueForKey:', NSDictionary only needs to override the latter, and its own documentation only needs to document the override.
The point is to keep in mind that the behavior of objects is documented in their reference guides *and* those of their superclasses.
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