On 10/10/07, Larry Garfield <larry@xxxxxxxxxxxxxxxx> wrote: > > > On Wed, 10 Oct 2007 13:39:31 -0400, "Nathan Nobbe" <quickshiftin@xxxxxxxxx> > wrote: > > > The fact that you have used interfaces in that example proves nothing to > > me. > >> It is possible to code a solution which does not use interfaces, so > what > >> are > >> the benefits of the "with interfaces" solution over the"without > >> interfaces" > >> solution. If there are no benefits then I prefer to stick with the > >> "without > >> interfaces" solution. > > > > > > lets see your w/o example then. > > > That it is possible to write functioning code without Interfaces has never > been disputed. and im not disputing it either. > Just because you CAN use interfaces does not mean that you MUST use > >> interfaces. I can build solutions without them, so I do not see any > >> advantage in using them. > >> > > > > i told you what the benefit is; HumanHand and Grass have no relationship > > other than > > they are both Cuttable. > > the advantage to using them in this case is if Grass and HumanHand both > > inherited from > > the same base class they would have common member variables which makes > no > > sense > > because they arent directly related. > > > > there are plenty of libraries that are open source and utilize > interfaces > > in > > their design. > > look at ezc, onphp and SPL for more examples. > > > > -nathan > > Multiple inheritance. If you extend a class, you can do so at most once > for a given child class. But you can implement many interfaces. right; thats a benefit of interfaces i mentioned yesterday, but implementors dont get behavior from the interfaces the implement. which is a benefit exhibited by the lawnmower example that uses interfaces. -nathan
