Re: Outline and Table back to front
Re: Outline and Table back to front
- Subject: Re: Outline and Table back to front
- From: Thomas Davie <email@hidden>
- Date: Mon, 20 Jun 2005 18:37:45 +0100
On Jun 20, 2005, at 6:29 PM, Jesus De Meyer wrote:
No - we already do have one object describing the whole Cocoa class hierarchy, it is called NSObject. Everything *is* an NSObject.
An NSObject cannot parse an XML document, it cannot play movies, it can't connect a network, it can't play sounds, ... You need subclasses of NSObject to do all that.
At a more abstract level - a computer is a thing. So is a baseball bat.
Things can hit balls, and do calculations (as I can give you an example thing that does either of these).
Computers con not hit balls
Bats cannot do calculations.
Bob |
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