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Posted by Richard Levasseur on 06/29/06 19:57
FluffyCat wrote:
> On 27 Jun 2006 23:22:38 -0700, "Richard Levasseur"
> <richardlev@gmail.com> wrote:
>
> >
> >FluffyCat wrote:
> >> Last month I continued my series of design patterns examples using PHP
> >> 5 with the Observer Pattern and the Prototype Pattern. Here now is my
> >> 16th example, the Adapter pattern.
> >>
> >> http://www.fluffycat.com/PHP-Design-Patterns/Adapter/
> >>
> >> In the Adapter Pattern we adapt a class we have to provide methods
> >> another class needs, without changing the original class.
> >>
> >> If you work with a lot of classes that you can not change, then this
> >> pattern is certainly something you would want to consider using on a
> >> regular basis.
> >
> >Wow, thats a very nice website you have. Some very clean examples,
> >though a bit more explanation might be needed for some. It contains
> >some things that every developer should know, especially PHP ones,
> >since most PHP devs aren't formally taught these concepts.
> >
> >For the iterator pattern you should note that there is a native
> >iterator interface in PHP5 (several, actually), allowing you to iterate
> >over arbitrary objects using foreach(). Other interfaces are available
> >to allow array access with [], using count(), etc etc.
> >
> >Might want to note that only the most recent versions of MySQL support
> >the really useful SQL features, too, simply because MySQL < 4.1 is
> >still so common.
> >
> >A short blurb or links about database normalization could be helpful,
> >too.
>
> Thanks very much for checking out the site!
>
> I agree with you on the thin explanations. The focus of the site is
> to just give examples, but being a little more verbose would probably
> help many readers.
>
> Good point about iterators too. It's a funny pattern with most
> languages already having an iterator, which is why I tried to
> illustrate implementing an iterator with an algorythm that wasn't just
> linearly traversing the array one element at a time.
>
> Funny you mention db normalization, I was considering doing a series
> on that once I finish the php design patterns. Probably show one
> example in 1st - 4th or 5th normal form. Have to come up with good
> example data for that.
>
> -Larry Truett
>
> LTruett@FluffyCat.com
>
>
> www.FluffyCat.com
A good example would probably be something along the Item-Supplier
common for shopping carts, or Employes-Managers-Dept-Company-etc.
This professor has some pretty good examples that you could mutiliate
for the purposes of explanation. His lecture notes also provide decent
explanation of the various normal forms.
http://www.sci.csueastbay.edu/~billard/case/
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