Re: NSArray operator implementing
Re: NSArray operator implementing
- Subject: Re: NSArray operator implementing
- From: Steven Kramer <email@hidden>
- Date: Fri, 26 Nov 2004 11:51:30 +0100
Hi Cornelius,
Don't think this is going to be trivial. I haven't tried and have no
knowledge of prior art, but the only way I can think of to achieve this
would be to override several of the KVC and KVO methods in a subclass
of NSArrayController. I think you need to override (at least)
addObserver:forKeyPath:options:context: and valueForKeyPath: and the
implementations will be non-trivial.
Perhaps someone@apple can tell you more, I doubt you'll find this info
outside of Apple.
How is this done in Java, BTW?
Good luck,
Steven
Op 23-nov-04 om 0:59 heeft Cornelius Jaeger het volgende geschreven:
Hi All
i'm new to cocoa and i'm wondering how to extend or add operators to
NSArray.
In Java it is fairly simple, not sure how to go about it in
Objective-C.
what i need is a @flatten operator, that will take a keypath and
flatten the arrays within.
the motivation is that i've been using bindings, thanks mmalc for the
excellent examples, got me up and running presto, and it seems many of
the bindings that expect BOOL or ValueTransformers need to be a fed a
value from an array. I've come across some situations where i have
nested arrays which won't work on the receiver.
To Use mmalcs ToDo example
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